Ruby developer jobs in SheffieldCreate job alerts

At RemoteStar, we're currently hiring for one of our clients based in Houston, TX. Years of experience: 3 to 5 years Location: USA About Client: A fast-growing US-based SaaS company is transforming how energy firms manage operations. Their end-to-end ERP platform streamlines field data, production, finance, land, and compliance, delivering real-time insights and operational efficiency. With a strong client base and innovative tech, they’re redefining digital transformation in the energy and utilities sector. You’ll design and implement AI-driven functionality that improves automation and user experience. This includes leveraging LLMs, machine learning models, and modern AI tooling within a production SaaS environment. This is a hands-on role for someone who can move quickly, make pragmatic decisions, and bring AI concepts into real, scalable product features. Responsibilities • Design and implement AI-powered features within the platform (e.g., automation, recommendations, copilots) • Integrate LLMs and/or ML models into existing services and workflows, • Evaluate, select, and optimize AI tools, APIs, and frameworks for production use, • Collaborate with Product to translate business problems into AI-driven solutions, • Build and maintain scalable backend services to support AI functionality, • Profile, test, and optimize performance of AI-integrated systems, • Ensure reliability, security, and cost-efficiency of AI components in production, • Contribute to architecture decisions around AI integration and system design, • Partner with engineering teams to embed AI into existing applications without degrading stability Requirements • 3+ years of experience as a software engineer in a SaaS or cloud-based environment, • Strong backend engineering experience (RoR and/or Golang preferred), • Experience integrating APIs and working within distributed systems, • Hands-on experience with AI/ML tools (e.g., OpenAI, Anthropic, Hugging Face, or similar), • Experience building or integrating AI-powered features into applications (not just experimentation) • Strong understanding of data flow, system design, and performance optimization, • Experience with relational databases (SQL Server or similar), • Familiarity with microservices architecture, Kubernetes, and CI/CD pipelines, • Experience deploying applications in Azure or similar cloud environments, • Strong problem-solving skills with ability to work in ambiguous, fast-moving environments, • Builder mindset—someone who can take an idea and turn it into a working feature quickly, • Pragmatic approach to AI (focus on value, not hype), • Ability to work independently in a contract environment while collaborating closely with internal teams • Strong communication skills and ability to explain AI concepts to non-technical stakeholders Preferred • Experience with prompt engineering, embeddings, or retrieval-augmented generation (RAG) • Exposure to model evaluation, fine-tuning, or AI performance monitoring, • Experience with event-driven architectures or real-time data processing, • Background in energy, fintech, or other complex data-driven industries

About the company and the project:.Middle Ruby on Rails Developer .Their platform helps educational institutions manage and distribute digital learning materials — from e-textbooks to interactive courseware.Their solutions are used by thousands of schools and universities, helping students save o

Tether, the founder of the first, largest, and most widely used stablecoin USD₮, is rapidly expanding into a wide range of sectors, including secure and unstoppable communication technologies, energy production, mining, and further fintech infrastructure. All of these themes share and are deeply rooted in the principles of Bitcoin, which include decentralization, resilience, openness, freedom, security, and scalability. Tether stablecoins are used to power a wide variety of enterprises, including exchanges, wallets, payment processors, and financial services, by facilitating the use of reserve-backed tokens across blockchain networks. Tether stablecoins offer a global, secure, and instant means of storing, transmitting, and receiving digital tokens at a fraction of the cost of alternative traditional financial solutions. Unwavering transparency is of paramount importance and central to Tether's foundational principles. Our dynamic team operates entirely remotely, uniting talent from every corner of the globe. Our journey has been marked by rapid growth and efficient operations, firmly establishing us as pioneers within the industry. If you possess a passion for venturing into uncharted territory and believe in your ability to conquer even the most formidable challenges, we eagerly invite you to engage with us. Join our mission, and together, let's lay the groundwork for a decentralized future that reshapes industries far beyond the realm of stablecoins. As a Senior Backend Developer, you will be a part of the team that works on the development of Tether backend components New Products and Features - Tether continuously strives to create innovative new features in order to provide the most professional trading experience for customers. These are developed and deployed using agile methodologies, to ensure the user experience remains the best in the industry. Scalability - all backend services that power Tether must remain effortlessly smooth, responsive, and real-time for customers as the platform continues to scale to accommodate new user growth. Security - Security is the most important feature. The Backend Development team is responsible for building all the services and core processes with the highest security principles and standard, in order to protect the safety of the entire user base. Exceptional Node/JavaScript skills Familiar with microservices architecture Have actively participated in the development of a complex platform Familiar with Peer-to-Peer technologies Good experience in interacting with databases (MySQL, MongoDB) Ability to quickly learn new technologies Good understanding of security practices Nice to have Experience with blockchain integration Comfortable with high-availability concepts Ruby, Rust or C++ skills are a plus Other technologies of interest: Message queues (Redis), Caches and Job Queues

Our freelance role is fully remote so, you just need a laptop, internet connection, time available and enthusiasm to take on a challenge. Why this freelance opportunity might be a great fit for you?. Take part in a part-time, remote, freelance project that fits around your primary professional or ac

Bitfinex is a digital asset trading platform offering state-of-the-art services for digital currency traders and global liquidity providers. Founded in 2012, Bitfinex was one of the first professional platforms set up to accommodate for the booming interest in cryptocurrency trading. Since then, our team has gained invaluable experience whilst cementing our spot as the go-to platform for digital asset traders and institutions. Our Mission Our aim is to create a free and accessible global digital economy by disrupting the current financial services industry. Our team is entirely remote, composed of individuals with an ownership mentality; no one waits to be told what to do. Each member of the team is a highly motivated self-starter that is comfortable with autonomy and believes in lifelong learning. When we’re not working, we’re dreaming about it. We place our egos aside and thrive within a culture that fosters one another from the birth of a concept to launch of a product. At Bitfinex you have the freedom to work as you please - all that matters is execution. Join us and help lay the foundation for a decentralized future. Currently looking for: Senior Backend Developer [Remote] Key responsibilities As a senior Backend Developer, you will be a part of the team that works on the development of the backend components of all Bitfinex Services (main trading application, Bitfinex Pay, Lightning Network support, Blockchain integrations, ….). This includes: New Products and Features - Bitfinex continuously strives to create innovative new features in order to provide the most professional trading experience for customers. These are developed and deployed using agile methodologies, to ensure the user experience remains the best in the industry. Scalability - all backend services that power Bitfinex platform must remain effortlessly smooth, responsive, and real-time for customers as the platform continues to scale to accommodate new user growth. A good example are the renown Bitfinex API, the most solid, low-latency and complete in our industry. Security - Bitfinex makes Security its most important feature. The Backend Development team is responsible for building all the API services and backend processes with the highest security principles and standard, in order to protect the safety of the entire user base. • 6+ Years of Node/JavaScript experience Familiar with microservices architecture Have actively participated in the development of a complex platform Good experience in interacting with databases (MySQL, MongoDB) Ability to quickly learn new technologies Good understanding of security practices Nice to have Experience with blockchain integration Comfortable with high-availability concepts Ruby, Rust or C++ skills are a plus Other technologies of interest: Message queues (Redis), Caches and Job Queues

Hiring: Senior Ruby on Rails Developer (Remote - UK Based).Anywhere in the UK (100% Remote).Full-Time | Flexible Hours | Work-Life Balance Champions.Ready to level up your dev career with a company that.Join a forward-thinking tech powerhouse where creativity meets cutting-edge code.You’ll be part

Gigged AI is an open talent marketplace specialising in the IT and technology sector. We have an opportunity live at the moment for a Full Stack Java Developer. This role is hybrid, with 3 days per week in Glasgow City Centre Office. Location: UK-based Duration: Initial 6-month contract Start Date: ASAP Day Rate: £300 IR35 Status: Outside IR35 (pending final determination) All applicant proposals will be reviewed directly on the Gigged AI platform by the hiring manager. In order to send a proposal please follow the below steps head to app.gigged.ai and create a free talent profile once signed in, follow this link to the project - https://app.gigged.ai/find-a-gig/RKvjrJyjLod you will now see a 'submit proposal' button please fill this in (intro, relevant experience, and attach CV to this) We are seeking an experienced Senior Full Stack Java Developer with 7–8+ years of hands-on experience in designing, developing, and supporting enterprise-grade web applications. The ideal candidate will possess strong expertise in Java-based technologies, modern frontend frameworks, microservices architecture, CI/CD practices, and Agile delivery methodologies. This role requires direct client interaction, technical leadership, and the ability to deliver high-quality software solutions in a fast-paced environment. Key Responsibilities • Design, develop, test, and maintain scalable enterprise web applications, • Build and support microservices-based solutions using Java and Spring technologies, • Develop RESTful APIs and web services for integration with internal and external systems, • Collaborate with business stakeholders, architects, and cross-functional teams to gather and refine requirements, • Participate in architecture discussions, code reviews, and technical design sessions, • Develop and maintain frontend applications using ReactJS and related JavaScript technologies., • Implement CI/CD pipelines and deployment automation processes., • Troubleshoot production issues and perform root cause analysis., • Ensure adherence to coding standards, security best practices, and performance optimisation techniques., • Participate in Agile/Scrum ceremonies, including sprint planning, stand-ups, retrospectives, and reviews., • Engage directly with onsite clients and stakeholders to provide technical consultation and delivery support. Required Experience & Skills Experience • Minimum 7–8 years of experience in software development and enterprise application delivery., • Proven experience developing web-based applications using:, • ReactJS, • Spring Boot, • Microservices Architecture, • REST APIs/Web Services, • Spring MVC, • JEE Technologies (Java 8+, JSF, JPA, JSP, Servlets, JDBC), • XML Technologies (DOM, SAX, XSLT), • HTML5, DHTML, JavaScript, • JBoss Application Server, • Core Technical Skills, • Java 8 or higher, • Spring Framework (Spring Boot, Spring MVC), • JUnit 4 & JUnit 5, • FreeMarker Templates, • Oracle Database, • Git, • Ruby, • Bundler, • Gradle, • Leiningen, • GoCD, • Ansible (Mandatory), • Mulesoft, • Frontend Technologies (Preferred), • JavaScript, • ReactJS, • Redux, • Node.js, • Cloud & DevOps, • Experience developing and deploying applications on AWS., • Strong knowledge of:, • Jenkins, • Maven, • CI/CD pipelines, • Build and release management processes, • Development Tools, • IntelliJ IDEA or equivalent modern IDEs., • Source control and version management best practices. Required Competencies • Strong analytical and problem-solving skills., • Excellent verbal and written communication skills., • Proven ability to work effectively in collaborative team environments., • Experience working in Agile/Scrum delivery frameworks., • Strong client-facing and stakeholder management skills., • Ability to mentor junior developers and contribute to technical leadership initiatives., • Preferred Qualifications, • Experience with FreeMarker template development., • Knowledge of application performance monitoring and profiling tools such as:, • Glowroot, • JProfiler, • Experience with performance tuning and application optimization., • Exposure to modern DevOps and automation practices

Software Development, Computer Science, or other related fields.

Develop and maintain full-stack web applications using Ruby on Rails and TypeScript. Senior Full Stack Ruby on Rails Developer (Remote - UK Based). I am hiring a Senior Full Stack Developer with strong Ruby on Rails experience to join a remote-first, innovation-driven tech company.

🎯 Join the Tech Powerhouse Behind Next-Gen iGaming Platforms! Are you a seasoned backend engineer ready to tackle the complex world of real-time, high-frequency data exchange? Our client, a fast-growing B2B iGaming platform provider in Malta, is building the future of Sports Exchange services—and they need top engineering talent to make it happen. 💼 About the Role We’re looking for a senior backend developer (language agnostic) with deep knowledge in designing high-performance, distributed systems. You’ll work in a core product team focused on building scalable, event-driven architectures that power millions of transactions across casino, sportsbook, and exchange products. This is a strategic, high-impact role in a team responsible for one of the most technically demanding areas of the platform. 🔧 Tech Stack (You don’t need them all—expertise in any of these is welcome!) Languages: Go, Node.js, Java, Rust, Ruby on Rails Messaging & Stream Processing: gRPC, RabbitMQ, NATS Jetstream Datastores: Redis, ClickHouse, PostgreSQL, MongoDB Cloud & Infra: Docker, Kubernetes, CI/CD pipelines Architecture: Microservices, real-time APIs, event-driven systems ✅ What You’ll Do Architect and develop backend systems for real-time sports exchange services Design high-throughput, low-latency services Work with cross-functional teams to deliver reliable and scalable solutions Lead code reviews, system design discussions, and performance tuning Mentor other engineers and help define technical best practices 🎯 What We’re Looking For 5+ years of backend experience in complex, high-performance systems Proven expertise in at least one of these backend languages ; Go, Java, Node.js, Rust, RoR Experience with microservices and event-driven design Familiarity with message queues and real-time data pipelines Comfortable working in a fast-paced, agile environment Excellent problem-solving and communication skills Proficient in English 🌍 Global Talent Welcome Relocation support to Malta, visa sponsorship, and remote flexibility are offered. Join a diverse team solving real engineering challenges at scale. Your application has been successfully submitted! _

Software Development, Computer Science, or other related fields.