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Job DescriptionAre you ready to revolutionize the advertising industry? At Cognitiv, we are not just another AdTech company—we are industry trailblazers redefining media buying with our Deep Learning Advertising Platform. Since 2015, we have harnessed the power of cutting-edge deep learning technology and data science to transform how brands connect with their customers. Our mission? To bring intelligence to advertising and deliver unparalleled precision, relevance, and impact at scale. With our innovative platform, advertisers enjoy unprecedented flexibility—whether it is activating Dynamic Deals through their preferred DSP, leveraging our managed service DSP, or utilizing our industry-first ContextGPT product. As a part of Cognitiv, you will be at the forefront of AI-driven advertising solutions, driving change and achieving remarkable growth in a rapidly evolving industry.Now, we're growing!The RoleWe are looking for a world class Senior Software Engineer for the RTS (real-time systems) team. The RTS team forms the heart of our programmatic bidding platform. Our systems process tens of trillions of auction bid requests every year and evaluate them using our AI models running in the hot path. The platform requires incredible throughput and tight latency to meet our customer's needs.Our RTS systems are written in modern C++, and we're seeking an engineer passionate about building high-performance services.This position will be in our Bellevue, WA office with a hybrid work schedule of 3 days in office (Mon/Tue/Wed) and 2 days remote (Thursday/Friday).What You'll Do • Design, implement, test, optimize, and maintain our core platform in the form of robust libraries and software development tools with a focus on high performance and reliability., • Design complex software systems and participate in thorough, constructive reviews., • Collaborate with cross-functional teams to align on project goals and deliver high-quality solutions., • Own the entire service management lifecycle for the systems you work on.Who You Are, • Proficient in and enjoy working with modern C++. Candidates with strong experience in other unmanaged languages such as C or Rust and a desire to learn C++ will also be considered., • Independent self-starter who takes ownership, sees the big picture, and drives creative solutions., • A constructive, supportive team player, with good communication and interpersonal skills., • Experience building very high-volume, low-latency, real-time back-end services in cloud environments (e.g., AWS, GCP, Azure).Bonus Points, • 5+ years in software engineering, ideally focused on real-time systems or high-performance back-end services., • Professional experience with asynchronous architectures, such as event loop or actor model systems, • Strong foundation in operating systems and low-level programming, including memory management, data structures, concurrency, and lock-free programming.Salary:, • $160,000 - $210,000 USD Base Salary + EquityWhat We OfferCompensation is based on experience, skills, and other factors. Base salary is just one part of your total rewards at Cognitiv—you'll also receive equity and a comprehensive benefits package.Highlights include:, • Medical, dental & vision coverage (some plans 100% employer-paid), • 12 weeks paid parental leave, • Unlimited PTO + Work-From-Anywhere August, • Career development with clear advancement paths, • Equity for all employees, • Hybrid work model & daily team lunch, • Health & wellness stipend + cell phone reimbursement, • 401(k) with employer match, • Parking (CA & WA offices) & pre-tax commuter benefits, • Employee Assistance Program, • Comprehensive onboarding (Cognitiv University), • …and more!What You'll Find at Cognitiv, • Festiv – We make work fun with cross-team games, events, and creative team bonding., • Responsiv – You'll be close to clients and leadership, influencing real outcomes., • Inclusiv – Diversity and individuality are celebrated across all levels., • Inventiv – We reward curiosity and embrace bold ideas., • Transformativ – We support your growth with training, mentorship, and flexibility., • Collaborativ – We operate across coasts, connected by purpose and teamwork.Cognitiv is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive workplace for all.

Job DescriptionAircall is a unicorn AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, faster resolutions, and scale. We’re redefining what a customer communications platform can be—by combining voice, SMS, WhatsApp, and AI into one seamless workspace. Our momentum comes from a simple but powerful idea: help every customer-facing team work smarter, not harder. Aircall’s AI Voice Agent automates routine calls, AI Assist streamlines post-call tasks, and AI Assist Pro delivers real-time guidance that helps people do their best work. The result—companies grow revenue, deliver faster resolutions, and scale service. We’ve built a product customers love and a business that scales fast. Aircall operates in nine global offices (Paris, New York, San Francisco, Sydney, Madrid, London, Berlin, Seattle, and Mexico City), and is backed by world-class investors. Our teams are shipping AI innovation faster than ever and expanding across new product lines and markets. At Aircall, you’ll join a company in motion—ambitious, profitable, and product-driven—where impact is visible, decisions are fast, and growth is real. How We Work at Aircall: At Aircall, we believe in customer obsession, continuous learning, and delivering extraordinary outcomes. We value open collaboration, taking ownership, and making smart, informed decisions with speed and precision. If you thrive in a fast-paced, team-driven environment where curiosity, trust, and impact matter, you'll fit right in As a Senior Security Engineer, Detection and Response you will contribute to develop, scale, and evolve Aircall’s threat detection and response capabilities. Take ownership of building detections from scratch, leading investigations, and driving the maturity of our detection program.Responsibilities • Lead end-to-end development of detection logic: from threat modeling and hypothesis to writing, testing, tuning, and deploying detection rules and alerts (across logs, telemetry, host, network, cloud)., • Build detection pipelines, orchestration, triage logic, and automation for alert handling and response (e.g. SOAR, playbooks)., • Conduct threat hunts proactively in corporate and production environments, discovering anomalies and attacker behaviors before they escalate., • Lead incident response: investigate, contain, remediate, and perform root cause analysis. Drive post-incident reviews and feed lessons learned back into detection strategy., • Assess and fill gaps in visibility—work with engineering teams to ensure logging, instrumentation, and context are sufficient to detect relevant threats., • Evolve detection maturity: turn simple signature-based alerts into more advanced behavioral, statistical, ML-driven, and adversary-informed detections, in line with detection engineering maturity models., • Author and maintain detection documentation, runbooks, alert definitions, tuning guidelines, and metrics., • Collaborate cross-functionally (Engineering, Product, Fraud, Privacy and Legal) to align detection and response work with product lifecycles and system architecture., • Be part of on-call rotations or threat-response rotations; escalate, coordinate, and remove blockers during high-severity events., • Stay up to date on attacker techniques (MITRE ATT&CK, red team reports, threat intel) and propose new detection patterns or responses accordingly., • Participate in hiring, interview evaluation of Security and Infrastructure engineering candidates, and team growth.Minimum Qualifications, • 5+ years of hands-on experience in security operations, detection engineering, incident response, threat hunting, or similar fields (or equivalent combination)., • Deep knowledge of adversarial tactics, techniques, and procedures (TTPs), threat actor behavior, kill-chain or MITRE ATT&CK framework., • Proven experience building detections from scratch (versus just tuning commercial alerts)—i.e. you can turn a hypothesis or a threat intel indicator into a production-quality detection with low false positive rate., • Hands-on experience with SIEM or log analytics platforms (e.g. Elasticsearch, Splunk, Datadog, AWS Athena, OpenSearch or equivalent), and alerting/monitoring tooling., • Proficiency with a programming or scripting language (e.g. Python, Go, or similar along with IaC - Terraform, Ansible) to build detection pipelines, automations, triage logic, or tooling, • Experience in digital forensics, host-based detection, endpoint telemetry, process/network visibility, cloud observability (logs, metrics, traces)., • Comfortable working in cloud-first environments (AWS, GCP, Azure) and instrumenting detection across cloud workloads, containers, serverless, etc., • Experience responding to incidents (investigating logs, creating timelines, root cause, containment) in production environments., • Familiarity with security automation / orchestration (SOAR), playbooks, response automation, and alert triage workflows., • Strong communication skills; ability to translate complex detection logic, trade-offs and risk to engineers and leadership., • High degree of autonomy, initiative, and ownership; ability to drive entire initiatives with minimal oversight.Preferred Qualifications, • Experience with data analysis, statistics, anomaly detection, or relevant ML/heuristic techniques is a strong plus., • Experience evaluating detection efficacy (precision, recall, signal-to-noise, tuning over time), • Experience evolving detection maturity models (from basic rules to advanced behavioral detections)