full stack ruby engineer jobs in London

McGregor Boyall is recruiting a Senior Full Stack Engineer for a leading financial technology client in London. You will work on a greenfield trading platform, using TypeScript/React with AWS, shaping architecture and scalable solutions for global markets.You will own end-to-end development, mentor juniors, and collaborate with AWS specialists and architects...

Digital Futures is seeking a Full Stack Engineer to design, build and maintain high-quality digital and AI-enabled applications for clients. The role covers frontend, backend and cloud environments to deliver robust, scalable solutions that integrate into wider platforms.You will collaborate with product leads, designers and data scientists to translate...

Core ResponsibilitiesLead the design, architecture, and implementation of scalable APIs, services, and accessibility-first user interfacesDeliver AI-native features across both front-end and back-end, spanning carbon accounting, ESG data collection, and sustainability planning capabilitiesDrive the evolution of the platform into modular, event-driven,...

Conveo.ai is building an AI research platform used by global brands. We seek a Senior Product Engineer who owns the full stack from interface to infrastructure, shaping product direction with technical impact.You’ll lead frontend architecture in React/TypeScript, design robust APIs, and ship complete features including AI-powered capabilities on AWS/GCP,...

BNY is seeking a Senior Associate, Full-Stack Engineer in London. In this role, you will design and maintain backend services while collaborating on frontend development. Key responsibilities include delivering secure, scalable systems and contributing to performance enhancements.Required qualifications include proficiency in Java, knowledge of...

Expedia Group in London is seeking a Software Development Engineer II (Full-Stack) to build React-based user interfaces and backend capabilities. You will own features from requirements through delivery, collaborating with product management, backend teams, platform teams, and brand teams to create configurable components and platform capabilities.The role...

A pioneering e-commerce platform is seeking a Senior Full Stack Engineer to develop impactful features for their pre-commerce platform. You will work across frontend and backend systems, collaborating closely with a small engineering team. The role requires 5+ years of experience in both frontend and backend development, focusing on delivering customer value...

A rapidly growing payments technology company in London is seeking a Senior Full Stack .NET Engineer to enhance their team. This pivotal role involves designing cloud-native applications and integrations, with strong focus on .NET Core, Microsoft Azure, and SQL. The ideal candidate has 5+ years of experience and is excited to influence product strategy in a...

State Street is seeking an experienced Java Full Stack Developer to join our Digital Asset team. You will deliver end-to-end product experiences across Java back-end services and modern UI components, enabling digital asset capabilities in a regulated financial services environment.You will build REST APIs, orchestrate microservices, and develop responsive...

Eames Consulting Group seeks a Senior Full Stack Engineer to join a product-focused team building customer-facing digital solutions. You will own delivery across the full software lifecycle, designing, developing and deploying modern cloud-native applications on Microsoft Azure.You will collaborate with Product, Design and Engineering to build across...

Online Filings is seeking a Senior Software Engineer to architect and develop our next-generation web application and API. This role requires technical leadership, hands‑on development, and mentoring of junior developers to ensure scalability, security and performance.If you are passionate about software development, enjoy solving complex problems, and are...

Senior Full-Stack Engineer - AI Startup (Typescript, Node, React) London - 4 days per week in the office Permanent | £120,000 - £150,000 We're working with an exciting early-stage AI startup building an agentic platform for institutional finance. The company is a small, high-performing team of fewer than 10 people, moving quickly and building towards its...

Zapp is hiring a senior full-stack engineer to own end-to-end development for iOS, Android, and web experiences. Join an AI-first company building rapid, customer-focused solutions with NestJS, React, and GraphQL.You’ll work across backend, web, and infrastructure, and bring AI into daily workflows to ship impactful features. We value curiosity, energy,...

A leading recruitment agency is seeking a Senior Full Stack Engineer for a 12-month remote contract. The ideal candidate has at least 4 years of experience in Python and Flask, along with a strong grasp of SQL databases. Responsibilities include architecting backend services and building responsive front-end interfaces. This role involves mentoring junior...

Starling is recruiting a Full Stack Engineer (ML Ops) in London to join our data-driven fintech teams. You will design and build scalable backend services in Java and robust frontends with React/Redux, deployed on AWS, with a strong focus on reliability and performance.This hybrid role values ownership, collaboration and practical problem solving. We offer a...

Accenture is seeking a Full Stack LLM Development Associate Manager - Anthropic/Claude to design and deploy Claude‑powered web apps, APIs and agentic workflows. You will work across strategy and engineering teams to deliver scalable AI solutions, with emphasis on tool use, context management and secure data integration.You will apply Anthropic SDKs and...

Fin, now part of Salesforce, is on a mission to help businesses provide perfect customer experiences. As a Senior Full Stack Engineer in Team Web, you’ll craft intuitive front-end experiences and build backend systems that power them, collaborating with product marketers, designers, and engineers across the business.You’ll work across UI, APIs, and...

Pearson Carter Limited is partnering with a UK-based outdoor retailer to hire a Senior Full Stack Developer. The role centers on C#, React and TypeScript, with microservices architectures and API development in a remote-first environment.You'll work on greenfield and legacy projects, integrate with SQL Server and third-party services, and participate in...

Cedar Technology is recruiting an AI Full Stack Engineer to help an investment organisation undergo an ambitious AI transformation. You will join a small, influential AI team and work directly with senior stakeholders to design, develop and deploy intelligent applications across the business.You’ll own the end-to-end AI engineering lifecycle, building...

Fospha is hiring a junior software engineer in London to work across the full stack, from Frontend UI in React/Next.js to backend services in Python. You’ll collaborate with engineers, product managers and AI agents in our AI-first operating model, gaining ownership of features from day one.You will contribute to code reviews, learn spec-driven...