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Job DescriptionAt Quantcast, we're redefining what's possible in digital advertising. As a global Demand Side Platform (DSP) powered by AI, we help marketers connect with the right audiences and deliver measurable results across the Open Web. Our foundation is built on cutting-edge measurement and consumer analytics, giving our clients the tools they need to drive success in an ever-evolving digital landscape. Since our start in 2006, we've pioneered industry firsts—from launching the original measurement platform for digital publishers to introducing the first AI-driven DSP. If you're ready to be part of a dynamic, forward-thinking team that thrives on creating transformative solutions, Quantcast is the perfect place to grow your career. Quantcast is hiring Software Engineers to join our engineering team in our San Francisco office. As the real-time pulse of the Internet, Quantcast runs the world’s largest AI-driven insights and measurement platform directly quantifying over 100 million web destinations. We are using machine learning to drive human learning. Quantcast provides brand marketers and publishers with significant audience insights, predictive targeting and measurement solutions across the customer journey. You’ll have the opportunity to learn Software Engineering methodologies and will own projects from start to finish. You are passionate about building scalable backend systems and customer-facing applications. You will thrive in an environment where independent decision-making based on product requirements is the norm. We foster an agile environment where new ideas and software development come together to effectively pursue some of our industry's toughest problems.What you'll do: • You will provide technical solutions to take on exciting problems in the advertising industry., • You will partner with a team of engineers and work on a variety of large scale systems., • You will collaborate with Product & Business Operations teams to translate business requirements and build highly robust and scalable products., • You will gain exposure to existing Quantcast systems and our technologies to internal and external customers., • You will be responsible for the day-to-day product operations.Who you are:, • 0 - 3 years of experience., • You must be work-authorized in the United States without the need for current or future employer sponsorship., • BS, MS or PhD degree in computer science or related field., • This is a hybrid role based in our San Francisco office. To ensure a manageable commute for in-office days, candidates must reside within a 60-mile radius of San Francisco, CA. No relocation candidates at this time., • Excellent command of one or more programming language in Java or Python., • Experience working with distributed systems, big data and large-scale systems., • Deep understanding of algorithms and data structures., • Extraordinary verbal and written interpersonal skills.The salary range for this position is $144,900 - $168,400. #LI-AC1 Quantcast operates in a hybrid work environment. The in office days are Tuesday, Wednesday, and Thursday. At Quantcast, we craft offers that reflect your unique skills, expertise, and geographic location. On top of a competitive salary, this position includes eligibility for a performance bonus, equity, and a comprehensive benefits package. Depending on your location, this may include generous vacation, medical, dental, and vision coverage, and retirement plans. For more details, visit our Careers page and see how we support our team. Please see the Applicant Privacy Notice for details on our applicant privacy policy. Founded in 2006 and headquartered in San Francisco, we are a diverse, aligned community with offices across 10 countries worldwide. Join the team that unlocks potential. Quantcast is an Equal Opportunity Employer. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Job DescriptionAbout the teamAt Q-CTRL, Quantum Computing Engineering is a global team of software engineers and infrastructure experts,combining deep technical expertise with a startup mindset to deliver real impact through software innovation. Our work is underpinned by robust standards, and by embracing the three virtues. Our team excels in areas across back-end, front-end, machine learning, and platform engineering. We transform Q-CTRL’s world-leading technological breakthroughs into commercial software products with applications across defense, research, and industry. We work closely with Product, Design, and Research teams to accelerate the path to quantum advantage worldwide. About the role: As a Software Engineer, you’ll be responsible for developing software solutions for quantum technologies and deploying them in the Q-CTRL product suite.What you'll be doing: • Development work in the application code base for Q-CTRL’s error suppression products., • Assist in integrating Fire Opal with external customer’s systems., • Implementing novel control and error mitigation techniques developed in collaboration with research scientists for improving quantum circuit performance., • Mentoring other developers and autonomously addressing high priority work., • Review and address code and comments submitted by the team via pull requests., • Build robust tooling for monitoring, benchmarking, and experimentation., • Collaborating cross-functionally with members of Q-CTRL’s technical staff., • Other duties within the Employee's skills and experience, or with reasonable training.Ideally you'll have:, • A Bachelor’s or master’s degree in computer science, physics, or related STEM field., • 4+ years of experience as an individual contributor in a professional software role, or equivalent experience., • 4+ years of programming experience with Python, Rust, C++, or other general-purpose languages., • A background in quantum computing, software design, high performance computing, or the related.It would be fantastic if you have these skills/backgrounds but not essential:, • A Ph.D. in computer science, experimental physics, mathematics, or a related area., • Experience in experimental physics or the design and integration of superconducting quantum devices.

Job DescriptionCanvas Medical is the electronic medical records (EMR) and payments development platform for healthcare. We build modern, elegant front- and back-end tooling to enable new ways for developers and clinicians to collaborate to solve healthcare’s toughest challenges. Canvas is institutionally backed by some of the greatest technology investors in the world (funded notable health tech companies such as GoodRx, Oscar Health, and Hims & Hers Health). The Role We’re hiring an Applied AI Software Engineer to lead evaluations for agents in development and the post-deployment fleet of agents operating in Canvas to automate work for our customers. You will help develop agents in Canvas using state of the art foundation model inference and fine-tuning APIs along with our server-side SDK. The server-side SDK provides extensive tools and virtually all the context necessary for excellent agent performance. You’ll be responsible for designing and running rigorous evaluation experiments that measure performance, safety, and reliability across a wide variety of clinical, operational, and financial use cases. This role is ideal for someone with deep experience evaluating LLM-based agents at scale. You’ll create high-fidelity unit evals and end-to-end evaluations, define expert-determined ground truth outcomes, and manage iterations across model variants, prompts, tool use, and context window configurations. Your work will directly inform model selection, fine-tuning, and go/no-go decisions for AI features used in production settings.You’ll collaborate with product, ML engineering, and clinical informatics teams to ensure that Canvas's AI agents are not only capable, but trustworthy and robust under real-world healthcare constraints. You will also work with technical product marketers and developer advocates to help our broader developer community and the broader market understand the uniquely differentiated value of agents in Canvas.Who You Are • You have extensive hands-on experience evaluating LLM-based systems, including multi-agent architectures and prompt-based pipelines., • You are deeply familiar with foundation model APIs (OpenAI, Claude, Gemini, etc.) and how to systematically benchmark agent performance using those models in applied settings., • You care about correctness and reproducibility and have built or contributed to frameworks for automated evals, annotation pipelines, and experiment tracking., • You bring structure to ambiguity and know how to define “correctness” in complex, nuanced domains., • You are comfortable collaborating across engineering, product, and clinical subject matter experts., • You are not afraid of complexity and are energized by the rigor required in healthcare deployments.What You’ll Do, • Design and execute large-scale evaluation plans for LLM-based agents performing clinical documentation, scheduling, billing, communications, and general workflow automation tasks., • Build end-to-end test harnesses that validate model behavior under different configurations (prompt templates, context sources, tool availability, etc.)., • Partner with clinicians to define accurate expected outcomes (gold standard) for performance comparisons in domains of clinical consequence, and partner with other subject matter experts in other non-clinical domains., • Run and replicate experiments across multiple models, parameters, and interaction types to determine optimal configurations., • Deploy and maintain ongoing sampling for post-deployment governance of agent fleets., • Analyze results and summarize tradeoffs in clarity for product and engineering stakeholders, as well as for technical stakeholders among our customers and the broader market., • Take ownership over internal eval tooling and infrastructure, ensuring speed, rigor, and reproducibility., • Identify and recommend candidates for reinforcement fine-tuning or retrieval augmentation based on gaps identified in evals.What Success Looks Like at 90 Days, • An expanded set of robust evaluation suites exists for all major AI features currently in development and in production., • We have well-defined correctness criteria for each workflow and a reliable source of expert-determined outcome objects., • Product and engineering teams have integrated your evaluation tools into their daily workflows., • Evaluation results are clearly documented and reproducible, enabling trust in the performance trajectory., • Your have effectively engaged your marketing counterparts to translate your work into key messages to the market and to Canvas customers.Qualifications, • 5+ years of experience in applied machine learning or AI engineering, with a focus on evaluation and benchmarking., • Proficiency with foundation model APIs and experience orchestrating complex agent behaviors via prompts or tools., • Experience designing and running high-throughput evaluation pipelines, ideally including human-in-the-loop or expert-labeled benchmarks., • Superlative Python engineering skills and familiarity with experiment management tools and data engineering toolsets in general including, yes, SQL and database management., • Familiarity with clinical or healthcare data is a strong plus., • Experience with reinforcement fine-tuning, model monitoring, or RLHF is a plus.

Job Description StubHub is on a mission to redefine the live event experience on a global scale. Whether someone is looking to attend their first event or their hundredth, we're here to delight them all the way from the moment they start looking for a ticket until they step through the gate. The same goes for our sellers. From fans selling a single ticket to the promoters of a worldwide stadium tour, we want StubHub to be the safest, most convenient way to offer a ticket to the millions of fans who browse our platform around the world. StubHub is seeking Senior Software Engineers in Android to design and develop next-generation technologies and complex features. As a Senior Software Engineer, you will be at the forefront of tackling significant, ambiguous, and non-trivial challenges as a core contributor and innovator, bringing creative technical solutions to life. In order to ensure our company's success, our Senior Software Engineers must demonstrate initiative and enthusiasm for the problems they tackle. StubHub is committed to being a phenomenal and inclusive place to work. As a Senior Software Engineer, you will also be an advocate and mentor for your team members, displaying leadership qualities and being an example for those around you. Location: Hybrid (3 days in office/2 days remote)About the teamThe Consumer Experience (CX) team is responsible for the end-to-end product experience for fans looking to discover, buy, and sell tickets to their favorite live events through our web and mobile platforms. It sits at the forefront of fulfilling StubHub's mission to become the global destination for accessing live event experiences by crafting the product experience that millions of fans interact with every day. We are obsessed with understanding our users' needs and delivering feature innovations, both short-term and long-term, that are as effective as they are enjoyable. We serve a global fan base and aim to deliver a localized experience that feels personalized to every individual in over 60 regions and 30 languages. We believe that diversity of thought and transparency of impact breed the best innovations, which is why we are a cross-functional team of specialists in product, design, engineering, and data working closely together with equal voice in ideation and equal access to insights. We work across the entire stack leveraging any tool or technology necessary to support web and mobile feature innovation at scale.What You'll Do: • Design, develop, test, deploy, and maintain impactful improvements across all StubHub's platforms and products, resulting in high-quality outcomes, • Collaborate with team members to ensure best practices across our code, • Manage individual initiative priorities, deadlines, and deliverables with your technical expertise, • Mentor other team members and help many increase their technical capabilities, fostering a culture of inclusion, results-oriented execution, open innovation, and limitless creativity What You've Done:, • 5-6+ years of professional experience in software development, • Extensive experience developing robust, mission-critical systems using multiple general-purpose programming languages (Kotlin or Java), • Demonstrated expertise in building software with one or more of the following: Infrastructure, Databases, Data Processing, Machine Learning, Distributed Systems, Security, and Privacy, • Previous experience designing and developing solutions to complex problems with significant business impact, • A strong understanding of how their systems interact with the broader production environment, including dependencies and platform primitives, • Exposure to React Native, • Proven ability to learn other coding languages, platforms, frameworks, and tool, • Experience owning projects from the initial idea all the way to production, • Experience mentoring junior engineers What We Offer:, • Accelerated Growth Environment: An environment designed for swift skill and knowledge enhancement, where you have the autonomy to lead experiments and tests on a massive scale., • Top Tier Compensation Package: Competitive base, equity, and upside that tracks with your impact., • Flexible Time Off: Enjoy unlimited Flex Time Off, giving you the flexibility to manage your schedule and take time to recharge as needed., • Comprehensive Benefits Package: Prioritize your well-being with a comprehensive benefits package, featuring 401k, and premium Health, Vision, and Dental Insurance options. The anticipated gross base pay range is below for this role. Actual compensation will vary depending on factors such as a candidate's qualifications, skills, experience, and competencies. Base annual salary is one component of StubHub's total compensation and competitive benefits package, which includes equity, 401(k), paid time off, paid parental leave, and comprehensive health benefits. Salary Range$200,000—$250,000 USDAbout UsStubHub is the world's leading marketplace to buy and sell tickets to any live event, anywhere. Through StubHub in North America and viagogo, our international platform, we service customers in 195 countries in 33 languages and 49 available currencies. With more than 300 million tickets available annually on our platform to events around the world -- from sports to music, comedy to dance, festivals to theater -- StubHub offers the safest, most convenient way to buy or sell tickets to the most memorable live experiences. Come join our team for a front-row seat to the action. For California Residents: California Job Applicant Privacy Notice found hereWe are an equal opportunity employer and value diversity on our team. We do not discriminate on the basis of race, color, religion, sex, national origin, gender, sexual orientation, age, disability, veteran status, or any other legally protected status.

Job DescriptionAbout PayJoy PayJoy is a mission-first credit provider dedicated to helping under-served customers in emerging markets to achieve financial stability and success. Our patented technology for secured credit provides an on-ramp for new customers to enter the credit system. Through PayJoy’s point-of-sale financing and credit cards, customers gain access to a modern quality of life. PayJoy’s credit also allows our customers to seize opportunities as micro-entrepreneurs, and provide safety acts as insurance for tough times. Through our cutting-edge machine learning, data science, and anti-fraud AI, we have served over 18 million customers as of 2025 while achieving solid profitability for sustainable growth. This role The senior Software Engineer Systems is responsible for defining the architectural direction and making high-impact technical decisions that wi l shape the development of platforms for MarTech Systems, which drive global customer acquisition, activation, engagement, and retention. Responsibilities • Own medium-sized features and services end-to-end — including technical design, development, testing, deployment, and ongoing maintenance., • Write clean, performant, secure, and wel-tested code with strong observability and monitoring., • Independently break down requirements, manage risks, and deliver high-quality outcomes with predictable execution., • Improve system reliability, scalability, and maintainability by addressing technical debt and operational gaps., • Participate in architectural discussions and provide constructive design and code review feedback across the team., • Colaborate with Product, Marketing, Data, and Operations to deliver scalable solutions that drive measurable business impact., • Communicate progress, trade-offs, and risks clearly to peers and stakeholders., • Contribute to onboarding, documentation, knowledge sharing, and a continuous improvement mindset., • Participate in hiring activities, mentorship, and building a strong, inclusive engineering culture. Requirements, • Bachelor’s degree in Computer Science, Software Engineering, or a related technical field., • 6–8+ years of software engineering experience, with ownership of production services and data-driven product features., • Strong proficiency in at least one backend language or framework, and solid experience with cloud-native architectures, including APIs, microservices, and event-driven systems (AWS preferred)., • CRM / CDP integrations (Salesforce and at least one platform such as Marketo, Braze, or HubSpot), • Support for paid media activation (search, social, display, programmatic), • Personalization engines and retention tooling driving acquisition, engagement, and conversion, • Proven ability to execute independently, with strong judgment on when to raise risks, ask for help, or seek alignment., • Excellent communication and interpersonal skills, with the ability to collaborate effectively across Engineering, Marketing, Product, and Data teams, and contribute to an inclusive team culture.Nice to Have, • Experience with Adobe Experience Platform (AEP)., • Exposure to omnichannel activation (email, push, SMS, in-product)., • Interest in growing toward Staff / architecture responsibilities., • Experience in product-led or growth-driven companies.Benefits MXN, • 100% Company-funded Health and dental and vision discount plan for employees and immediate family members., • Life insurance., • Phone finance, Headphone, home office equipment and wellnes perks., • 30 days of Christmas bonus, • 20 days paid Vacation, • 50% Vacation premium, • 13% Saving funds, • $2,000 MXN monthly grocery coupons, • $2,000 MXN monthly restaurant coupons, • $2,000 USD annual Co-working Travel perk, • $2,000 USD annual Professional Development perkBenefits COL, • 100% Company-funded Health and Life Insurance for employees and immediate family members, • Indefinite-term contract, • 20 days of vacations, • $2,000 USD annual Co-working Travel perk, • $2,000 USD annual Professional Development perk, • $500 USD Phone finance with PJ, • $250 Wellness, • $200 Headphones

Job DescriptionAbout Taskrabbit: Taskrabbit is a marketplace platform that conveniently connects people with Taskers to handle everyday home to-do's, such as furniture assembly, handyman work, moving help, and much more. At Taskrabbit, we want to transform lives one task at a time. As a company we celebrate innovation, inclusion and hard work. Our culture is collaborative, pragmatic, and fast-paced. We're looking for talented, entrepreneurially minded and data-driven people who also have a passion for helping people do what they love. Together with IKEA, we're creating more opportunities for people to earn a consistent, meaningful income on their own terms by building lasting relationships with clients in communities around the world. Taskrabbit is a hybrid company with employees distributed across the US and EU and a Built In — Best Places to Work (2022, 2023, 2024) continually ranked across multiple national and regional categories. Join us at Taskrabbit, where your work will be meaningful, your ideas valued, and your potential unleashed! This role operates on a hybrid schedule requiring two days of in-office collaboration per week. The position can be based in either our San Francisco office or our new New York City office (opening January 2026). About the Role Machine Learning is a cornerstone at Taskrabbit, and we're looking for a seasoned Senior Machine Learning Engineer to join our team and help shape the future of ML/AI at Taskrabbit. This is a unique, full-stack role for an individual who is passionate about the entire machine learning lifecycle—from initial research and model development to building the robust infrastructure required to deploy and scale your work. As a Senior Machine Learning Engineer, you will tackle exciting challenges that directly impact how people discover and connect with home services on the Taskrabbit platform. You will play a crucial role in advancing our capabilities in areas like search ranking, content discovery, and recommender systems. You will collaborate closely with data scientists and other engineers to design and implement novel algorithms, and you will partner with software engineers to ensure the scalability, reliability, and optimization of our models in production. What You'll Work On: • Model Development & Research: Research, design, and implement machine learning models to solve key business problems in areas like search ranking, recommendations, and content discovery., • End-to-End ML Lifecycle: Own the entire lifecycle of ML models, including feature engineering, training, evaluation, deployment, and monitoring., • Infrastructure & Scalability: Build scalable and reliable ML infrastructure and data pipelines that support reproducible feature engineering and machine learning model deployment in real-time, near real-time, and batch processes., • Performance & Quality: Build monitoring services to understand data quality and model performance of complex systems, and collaborate with engineering and science teams to optimize existing algorithms for training and evaluation., • BS, MS, or PhD in Computer Science, Statistics, Operations Research, or a related quantitative field., • 3+ years of industry experience building and deploying high-quality, production-grade machine learning models and systems., • Strong theoretical knowledge and hands-on experience in machine learning, particularly in areas like search, ranking, recommender systems, or NLP., • Solid software engineering skills with proficiency in one or more programming languages, including Python. The candidate should have experience with popular ML libraries like Scikit-learn, lightgbm, xgboost, TensorFlow, PyTorch, etc., • Proficiency in SQL is also required for writing complex queries and transforming data., • Experience building REST API-based services., • Experience with modern data and ML technologies, such as Docker, Kubernetes, Kafka, Airflow, data warehouses (eg snowflake, redshift or BigQuery), and data lakes., • Familiarity with dbt (Data Build Tool) is a plus for transforming and testing data., • Familiarity with tools for Infrastructure as Code, such as Terraform, and CI/CD pipelines., • Excellent communication skills, with the ability to present complex findings and recommendations clearly to both technical and non-technical audiences. The base pay range for this position is $148,000 - $200,000. This range is representative of base pay only, and does not include any other total cash compensation amounts, such as company bonus or benefits. Final offer amounts may vary from the amounts listed above and will be determined by factors including, but not limited to, relevant experience, qualifications, geography, and level. You'll love working here because: • Taskrabbit is a Hybrid Company. We value flexibility and choice but also stay committed to regular in-person connection., • The People. You will be surrounded by some of the most talented, supportive, smart, and kind leaders and teams -- people you can be proud to work with!, • The Diverse Culture. We believe that we make better decisions when our workforce reflects the diversity of the communities in which we operate. Women make up half of our leadership team and our diversity representation is above that of the tech industry average. Taskrabbit is an equal opportunity employer and values diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, ancestry, citizenship, sex, gender, gender identity, sexual orientation, age, marital status, military/veteran status, or disability status. Taskrabbit is committed to working with and providing reasonable accommodation to applicants with physical and mental disabilities. Taskrabbit will consider for employment all qualified applicants with criminal histories in a manner consistent with applicable law. Taskrabbit will never use text or chat applications to conduct interviews. We have a thoughtful and interactive interview process that includes an initial recruiter phone screen and several video-based interviews with our hiring teams. Communications will always be conducted by taskrabbit.com domain names.

Job DescriptionAbout Quizlet: At Quizlet, our mission is to help every learner achieve their outcomes in the most effective and delightful way. Our $1B+ learning platform serves tens of millions of students every month, including two-thirds of U.S. high schoolers and half of U.S. college students, powering over 2 billion learning interactions monthly. We blend cognitive science with machine learning to personalize and enhance the learning experience for students, professionals, and lifelong learners alike. We’re energized by the potential to power more learners through multiple approaches and various tools. Let’s Build the Future of LearningJoin us to design and deliver AI-powered learning tools that scale across the world and unlock human potential. About the Role: As a Staff Software Engineer, you will lead architectural efforts for Quizlet’s identity, messaging, and trust & safety platforms. You’ll design secure and scalable systems for authentication, consent, and privacy, while guiding other engineers and influencing cross-team initiatives. Your work will ensure our infrastructure is resilient, compliant, and built for long-term growth. We’re happy to share that this is an onsite position in our San Francisco office. To help foster team collaboration, we require that employees be in the office a minimum of three days per week: Monday, Wednesday, and Thursday and as needed by your manager or the company. We believe that this working environment facilitates increased work efficiency, team partnership, and supports growth as an employee and organization.In this role, you will: • Lead architecture for authentication, authorization, and account management systems., • Build frameworks for consent management, secure messaging, and user protection., • Modernize legacy systems to improve scalability, observability, and compliance., • Partner with product, legal, and data teams to align trust & safety priorities., • Mentor engineers and help define long-term technical standards.What you bring to the table:, • 8+ years of backend/platform engineering experience, with expertise in identity or trust systems., • Demonstrated success leading cross-functional technical initiatives., • Strong knowledge of secure system design and data protection., • Hands-on experience with Node.js, Go, Python, or TypeScript., • Ability to influence technical direction and mentor peers.Compensation, Benefits & Perks:, • Quizlet is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Salary transparency helps to mitigate unfair hiring practices when it comes to discrimination and pay gaps. Total compensation for this role is market competitive, including a starting base salary of $196,320 - $268,100, depending on location and experience, as well as company stock options., • Collaborate with your manager and team to create a healthy work-life balance, • 20 vacation days that we expect you to take!, • Competitive health, dental, and vision insurance (100% employee and 75% dependent PPO, Dental, VSP Choice), • Employer-sponsored 401(k) plan with company match, • Access to LinkedIn Learning and other resources to support professional growth, • Paid Family Leave, FSA, HSA, Commuter benefits, and Wellness benefits We strive to make everyone feel comfortable and welcome!We work to create a holistic interview process, where both Quizlet and candidates have an opportunity to view what it would be like to work together, in exploring a mutually beneficial partnership. We provide a transparent setting that gives a comprehensive view of who we are! In Closing: At Quizlet, we’re excited about passionate people joining our team—even if you don’t check every box on the requirements list. We value unique perspectives and believe everyone has something meaningful to contribute. Our culture is all about taking initiative, learning through challenges, and striving for high-quality work while staying curious and open to new ideas. We believe in honest, respectful communication, thoughtful collaboration, and creating a supportive space where everyone can grow and succeed together.” Quizlet’s success as an online learning community depends on a strong commitment to diversity, equity, and inclusion. As an equal opportunity employer and a tech company committed to societal change, we welcome applicants from all backgrounds. Women, people of color, members of the LGBTQ+ community, individuals with disabilities, and veterans are strongly encouraged to apply. Come join us! To All Recruiters and Placement Agencies: At this time, Quizlet does not accept unsolicited agency resumes and/or profiles. Please do not forward unsolicited agency resumes to our website or to any Quizlet employee. Quizlet will not pay fees to any third-party agency or firm nor will it be responsible for any agency fees associated with unsolicited resumes. All unsolicited resumes received will be considered the property of Quizlet.#LI-FT We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Job Description Mercor is seeking experienced software engineers to support a leading AI lab in advancing research and infrastructure for next-generation machine learning systems. This engagement focuses on diagnosing and solving real issues derived from major open-source repositories through hands-on coding, debugging, and validation. It’s an opportunity to contribute your technical expertise to cutting-edge AI research while working independently and remotely on your own schedule. Key Responsibilities * Analyze and resolve software issues drawn from large open-source codebases * Write, test, and validate code solutions that address specific bugs or system inefficiencies * Implement and refine APIs, database structures, and backend components supporting AI workflows * Configure local development environments to replicate and investigate complex issues Ideal Qualifications * 1+ years of professional software engineering experience in a fast-paced or technically demanding environment * Proven contribution history to one or more of the following open-source repositories is a must: * astropy/astropy * django/django * matplotlib/matplotlib * pytest-dev/pytest * scikit-learn/scikit-learn * sphinx-doc/sphinx * sympy/sympy * Advanced proficiency in Python, API development, and structured testing * Excellent analytical, written, and communication skills * Exceptional attention to detail and persistence in debugging complex systems * Residency in one of the following regions: United States, United Kingdom, Canada, Australia, or New Zealand. More About the Opportunity * Fully remote and asynchronous — complete work on your own schedule * Expected workload: 10–20 hours per week, with flexibility to scale up to 40 hours * Duration: open-ended engagement with potential for long-term collaboration * Project start date: mid to late October (applications reviewed on a rolling basis) Compensation & Contract Terms * Independent contractor engagement through Mercor * Hourly compensation, paid weekly via Stripe Connect * Payments based on services rendered; contractors maintain full control over their work schedule and methods Application Process * Submit your resume and include links to your GitHub profile and relevant repository contributions * Applications reviewed continuously; shortlisted professionals will be contacted for next steps * Typical response time: within one week of submission About Mercor * Mercor is a talent marketplace that connects top experts with leading AI labs and research organizations * Our investors include Benchmark, General Catalyst, Adam D’Angelo, Larry Summers, and Jack Dorsey * Thousands of professionals across domains like engineering, research, law, and creative services have partnered with Mercor on frontier AI projects

Job DescriptionAbout Quizlet: At Quizlet, our mission is to help every learner achieve their outcomes in the most effective and delightful way. Our $1B+ learning platform serves tens of millions of students every month, including two-thirds of U.S. high schoolers and half of U.S. college students, powering over 2 billion learning interactions monthly. We blend cognitive science with machine learning to personalize and enhance the learning experience for students, professionals, and lifelong learners alike. We’re energized by the potential to power more learners through multiple approaches and various tools. Let’s Build the Future of LearningJoin us to design and deliver AI-powered learning tools that scale across the world and unlock human potential. About the Role: As a Senior Staff Software Engineer, you will work on critical infrastructure powering identity, account management, and trust and safety systems that serve millions of learners. You'll partner with experienced engineers and product managers to improve our secure sign-up/login flows, support compliant messaging, and implement scalable systems for user protection and privacy. We’re happy to share that this is an onsite position in our San Francisco office. To help foster team collaboration, we require that employees be in the office a minimum of three days per week: Monday, Wednesday, and Thursday and as needed by your manager or the company. We believe that this working environment facilitates increased work efficiency, team partnership, and supports growth as an employee and organization.In this role, you will: • Build and maintain secure authentication and account services (OAuth2, MFA, SSO), • Help scale our user messaging platform, integrating systems like Braze, • Implement features that support moderation, privacy requests, and abuse detection, • Ensure regulatory compliance through thoughtful consent flows and data handlingWhat you bring to the table:, • 10+ years of backend/platform engineering experience, with 5+ years in identity, messaging, or trust systems, • Experience in modernizing legacy account systems and building privacy-centric user platforms, • Hands-on experience in security, compliance, and messaging infrastructure (e.g., rate limiting, consent management, opt-in flows), • Hands-on experience with Node.js, Go, Python, or TypeScript., • Familiarity with tools like Braze, Segment, or equivalent martech stacks., • Passion for building platforms that enable scale, intelligence, and trust, • Fluency with platform security, privacy, and system design., • Proven ability to lead architectural transformation while shipping continuously, • Strength in cross-functional collaboration, especially with legal, marketing, and productCompensation, Benefits & Perks:, • Quizlet is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Salary transparency helps to mitigate unfair hiring practices when it comes to discrimination and pay gaps. Total compensation for this role is market competitive, including a starting base salary of $230,240 - $314,000, depending on location and experience, as well as company stock options, • Collaborate with your manager and team to create a healthy work-life balance, • 20 vacation days that we expect you to take!, • Competitive health, dental, and vision insurance (100% employee and 75% dependent PPO, Dental, VSP Choice), • Employer-sponsored 401k plan with company match, • Access to LinkedIn Learning and other resources to support professional growth, • Paid Family Leave, FSA, HSA, Commuter benefits, and Wellness benefits We strive to make everyone feel comfortable and welcome!We work to create a holistic interview process, where both Quizlet and candidates have an opportunity to view what it would be like to work together, in exploring a mutually beneficial partnership. We provide a transparent setting that gives a comprehensive view of who we are! In Closing: At Quizlet, we’re excited about passionate people joining our team—even if you don’t check every box on the requirements list. We value unique perspectives and believe everyone has something meaningful to contribute. Our culture is all about taking initiative, learning through challenges, and striving for high-quality work while staying curious and open to new ideas. We believe in honest, respectful communication, thoughtful collaboration, and creating a supportive space where everyone can grow and succeed together.” Quizlet’s success as an online learning community depends on a strong commitment to diversity, equity, and inclusion. As an equal opportunity employer and a tech company committed to societal change, we welcome applicants from all backgrounds. Women, people of color, members of the LGBTQ+ community, individuals with disabilities, and veterans are strongly encouraged to apply. Come join us! To All Recruiters and Placement Agencies: At this time, Quizlet does not accept unsolicited agency resumes and/or profiles. Please do not forward unsolicited agency resumes to our website or to any Quizlet employee. Quizlet will not pay fees to any third-party agency or firm nor will it be responsible for any agency fees associated with unsolicited resumes. All unsolicited resumes received will be considered the property of Quizlet.#LI-FT We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Job DescriptionAbout Quizlet: At Quizlet, our mission is to help every learner achieve their outcomes in the most effective and delightful way. Our $1B+ learning platform serves tens of millions of students every month, including two-thirds of U.S. high schoolers and half of U.S. college students, powering over 2 billion learning interactions monthly. We blend cognitive science with machine learning to personalize and enhance the learning experience for students, professionals, and lifelong learners alike. We’re energized by the potential to power more learners through multiple approaches and various tools. Let’s Build the Future of LearningJoin us to design and deliver AI-powered learning tools that scale across the world and unlock human potential. About the Role: As a Senior Software Engineer, you’ll design and implement the APIs and integrations that connect Quizlet to a global ecosystem of partners, AI agents, and learning platforms. You’ll help define the architecture for our LearnOS plugin system, build developer tooling, and collaborate across teams to ensure secure, scalable, and discoverable services. We’re happy to share that this is an onsite position in our San Francisco office. To help foster team collaboration, we require that employees be in the office a minimum of three days per week: Monday, Wednesday, and Thursday and as needed by your manager or the company. We believe that this working environment facilitates increased work efficiency, team partnership, and supports growth as an employee and organization.In this role, you will: • Design and deliver APIs powering partner integrations and agentic workflows., • Develop infrastructure for Quizlet widgets and embedded experiences in LMS and productivity tools., • Build developer-facing tools, SDKs, and plugin frameworks for external integrations., • Ensure API reliability, scalability, and security through rate-limiting and observability., • Mentor junior engineers and contribute to platform standards and design reviews.What you bring to the table:, • 5+ years of backend or platform engineering experience, including API design., • Strong experience building extensible REST/gRPC APIs, SDKs, and integration systems., • Knowledge of OAuth2, rate limiting, and platform security best practices., • Hands-on experience in Go, Python, Node.js, or TypeScript., • Strong collaboration skills and a product-focused engineering mindset.Compensation, Benefits & Perks:, • Quizlet is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Salary transparency helps to mitigate unfair hiring practices when it comes to discrimination and pay gaps. Total compensation for this role is market competitive, including a starting base salary of $170,880– $231,600, depending on location and experience, as well as company stock options., • Collaborate with your manager and team to create a healthy work-life balance, • 20 vacation days that we expect you to take!, • Competitive health, dental, and vision insurance (100% employee and 75% dependent PPO, Dental, VSP Choice), • Employer-sponsored 401(k) plan with company match, • Access to LinkedIn Learning and other resources to support professional growth, • Paid Family Leave, FSA, HSA, Commuter benefits, and Wellness benefits We strive to make everyone feel comfortable and welcome!We work to create a holistic interview process, where both Quizlet and candidates have an opportunity to view what it would be like to work together, in exploring a mutually beneficial partnership. We provide a transparent setting that gives a comprehensive view of who we are! In Closing: At Quizlet, we’re excited about passionate people joining our team—even if you don’t check every box on the requirements list. We value unique perspectives and believe everyone has something meaningful to contribute. Our culture is all about taking initiative, learning through challenges, and striving for high-quality work while staying curious and open to new ideas. We believe in honest, respectful communication, thoughtful collaboration, and creating a supportive space where everyone can grow and succeed together.” Quizlet’s success as an online learning community depends on a strong commitment to diversity, equity, and inclusion. As an equal opportunity employer and a tech company committed to societal change, we welcome applicants from all backgrounds. Women, people of color, members of the LGBTQ+ community, individuals with disabilities, and veterans are strongly encouraged to apply. Come join us! To All Recruiters and Placement Agencies: At this time, Quizlet does not accept unsolicited agency resumes and/or profiles. Please do not forward unsolicited agency resumes to our website or to any Quizlet employee. Quizlet will not pay fees to any third-party agency or firm nor will it be responsible for any agency fees associated with unsolicited resumes. All unsolicited resumes received will be considered the property of Quizlet.#LI-FT We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Job DescriptionAbout Quizlet: At Quizlet, our mission is to help every learner achieve their outcomes in the most effective and delightful way. We’re a $1B+ learning platform used by two-thirds of U.S. high school students and half of college students, powering over 1 billion learning interactions each week. We blend cognitive science with machine learning to personalize and enhance the learning experience for students, professionals, and lifelong learners alike. We’re energized by the potential to power more learners through multiple approaches and various tools. Let’s Build the Future of LearningJoin us to design and deliver AI-powered learning tools that scale across the world and unlock human potential. About Engineering: Quizlet's Product Engineering organization builds the core experiences that help millions of students and teachers achieve their learning goals. We collaborate across teams to achieve user-centric outcomes, focusing on developing intuitive interfaces, engaging learning tools, and robust, scalable systems. You’ll be joining a passionate group of engineers, designers, product managers, and data scientists dedicated to solving real-world educational challenges. Our teams operate with autonomy, embrace experimentation, and are deeply committed to user-centric design. We value transparency, inclusivity, and collaboration at all levels. About the Role: We’re looking for a Senior Software Engineer to design, build, and deliver impactful, user-focused features that are core to Quizlet’s success. You’ll work closely with other engineers, product managers, designers, and data scientists to turn ideas into scalable, high-quality solutions that serve millions of learners globally. As a senior individual contributor, you’ll take ownership of complex projects from concept through deployment, applying sound technical judgment and balancing trade-offs between user experience, performance, and maintainability. You’ll play a key role in shaping architecture, driving best practices, and mentoring teammates through code reviews, design discussions, and technical guidance. This role may span consumer web experiences, mobile platforms, or shared systems - flexibility, curiosity, and strong problem-solving skills are key. Our (non-exhaustive) Tech Stack: - Languages: Go, PHP, Typescript - Frameworks: React, Next.js, UIKit, SwiftUI, Jetpack Compose - Data: MySQL, PostgreSQL, Spanner, BigQuery - Misc: GCP, Datadog, Growthbook, Rollbar, Pub/Sub, Redis/Valkey, Docker/Colima, Kubernetes We’re happy to share that this is an onsite position in our New York or San Francisco office. To help foster team collaboration, we require that employees be in the office a minimum of three days per week: Monday, Wednesday, and Thursday and as needed by your manager or the company. We believe that this working environment facilitates increased work efficiency, team partnership, and supports growth as an employee and organization.In this role, you will: • Deliver end-to-end projects that directly contribute to Quizlet’s product and business priorities - from planning and design through implementation, testing, and rollout, • Collaborate with cross-functional partners in Product, Design, and Data Science to translate ideas into technically sound and impactful solutions, • Build and maintain high-quality, scalable systems that reflect a strong understanding of your team’s domain and its impact on learners and advertisers, • Apply industry best practices and modern technologies to improve code quality, system reliability, and developer efficiency, • Lead and contribute to technical discussions, offering thoughtful insights and helping to align the team on the best path forward, • Break down complex projects into actionable, well-scoped tasks and execute them efficiently with minimal oversight, • Proactively identify and resolve issues before they affect timelines, quality, or user experience, • Mentor and support junior engineers through code reviews, pairing sessions, and sharing domain knowledge, • Continuously seek opportunities to improve engineering practices, from build systems to deployment pipelines to observability toolsWhat you bring to the table:, • 5+ years of experience in software engineering, ideally in fast-paced, product-focused environments, • Proven ability to deliver complex projects end-to-end - from design and implementation through testing and deployment, • Solid foundation in backend, mobile development or full-stack, with a focus on building scalable, high-quality systems and user experiences, • Experience working with cloud infrastructure, distributed systems, and modern CI/CD practices, • Familiarity with microservices, event-driven systems, and data storage technologies, • Strong problem-solving skills and the ability to make thoughtful, data-informed technical decisions, • Curiosity to explore and apply emerging technologies and frameworks, • Excellent collaboration and communication skills, with the ability to work effectively in cross-functional teams, • Experience mentoring or guiding peers and contributing to a culture of learningBonus points if you have:, • Experience building and scaling education-focused or consumer-facing apps or subscription platforms or in an Ads publisher stack, • Worked in environments with high data or performance requirements, • Contributed to mobile-first product initiatives or multi-platform development, SDUI, • Hands-on involvement in incident response or operational engineering practicesCompensation, Benefits & Perks:, • Quizlet is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Salary transparency helps to mitigate unfair hiring practices when it comes to discrimination and pay gaps. Total compensation for this role is market competitive, including a starting base salary of $170,880 - $231,600, depending on location and experience, as well as company stock options, • Collaborate with your manager and team to create a healthy work-life balance, • 20 vacation days that we expect you to take!, • Competitive health, dental, and vision insurance (100% employee and 75% dependent PPO, Dental, VSP Choice), • Employer-sponsored 401k plan with company match, • Access to LinkedIn Learning and other resources to support professional growth, • Paid Family Leave, FSA, HSA, Commuter benefits, and Wellness benefits We strive to make everyone feel comfortable and welcome!We work to create a holistic interview process, where both Quizlet and candidates have an opportunity to view what it would be like to work together, in exploring a mutually beneficial partnership. We provide a transparent setting that gives a comprehensive view of who we are! In Closing: At Quizlet, we’re excited about passionate people joining our team—even if you don’t check every box on the requirements list. We value unique perspectives and believe everyone has something meaningful to contribute. Our culture is all about taking initiative, learning through challenges, and striving for high-quality work while staying curious and open to new ideas. We believe in honest, respectful communication, thoughtful collaboration, and creating a supportive space where everyone can grow and succeed together.” Quizlet’s success as an online learning community depends on a strong commitment to diversity, equity, and inclusion. As an equal opportunity employer and a tech company committed to societal change, we welcome applicants from all backgrounds. Women, people of color, members of the LGBTQ+ community, individuals with disabilities, and veterans are strongly encouraged to apply. Come join us! To All Recruiters and Placement Agencies: At this time, Quizlet does not accept unsolicited agency resumes and/or profiles. Please do not forward unsolicited agency resumes to our website or to any Quizlet employee. Quizlet will not pay fees to any third-party agency or firm nor will it be responsible for any agency fees associated with unsolicited resumes. All unsolicited resumes received will be considered the property of Quizlet. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Job DescriptionAbout PayJoy PayJoy is a mission-first credit provider dedicated to helping under-served customers in emerging markets to achieve financial stability and success. Our patented technology for secured credit provides an on-ramp for new customers to enter the credit system. Through PayJoy’s point-of-sale financing and credit cards, customers gain access to a modern quality of life. PayJoy’s credit also allows our customers to seize opportunities as micro-entrepreneurs, and provide safety acts as insurance for tough times. Through our cutting-edge machine learning, data science, and anti-fraud AI, we have served over 18 million customers as of 2025 while achieving solid profitability for sustainable growth. This role The Staff Engineer is responsible for leading our technical foundation, initially collaborating with the Money - Finance engine teams to drive innovation, with the opportunity to work with other teams as well, taking on a mentoring role, designing scalable systems, and influencing cross-functional initiatives, in a hands-on position where they will make key technical decisions and build critical services.Responsibilities • Solve Critical Problems: Identify, prioritize, and solve technical challenges impacting growth., • Lead and Collaborate: Architect new solutions, Implement newer patterns/framework that other candidates can use and implement, Identify potential systemwide solutions, guide teams, ensuring solutions meet business goals and technical standards., • Mentor & Develop: Foster a culture of learning, guiding junior engineers., • Innovate & Improve: Drive continuous improvement in our platform and processes.Requirements, • Bachelor’s degree in a technical discipline such as computer science, software engineering, or a related field., • 12+ years of experience as Software Engineer, in a fast-paced, high-growth environment, working with cloud platforms such as AWS, GCP, or Azure., • Strong expertise in backend development with proficiency in one or more programming languages such as Java, Python, PHP, or similar; as well both relational and NoSQL databases., • Solid understanding of distributed systems, system design principles., • A can-do attitude and creative, flexible problem solving abilities, and the ability to think critically in ambiguous situations., • Being a team player, that includes review, pair programming, collaboration in one task, mentoring or being mentored., • Strong written and verbal communication skills, with the ability to present technical concepts to non-technical stakeholders., • Desirable experience with mobile technologies or mobile payment systems with the fraud and identity aspects of fintech, as well in building and maintaining large-scale systems used by millions of users.Benefits, • 100% Company-funded Health and Life Insurance for employees and immediate family members, • Indefinite-term contract, • 20 days of vacations, • Phone finance, Headphone, home office equipment and fitness perks., • $2,000 USD annual Co-working Travel perk

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