full stack ruby engineer jobs in London

About the Role HTS Assist is Hopper's agentic AI assistant for travel, resolving flight changes, cancellations, refunds, and bookings over chat and voice for some of the world's largest travel brands. We're looking for a senior full stack engineer to anchor this product, owning the realtime and voice layer end to end while building across React/TypeScript...

EPAM Systems, Inc. in the United Kingdom is seeking a Lead Python Full-Stack Engineer (AI Integration) in a hybrid role. You will drive architecture, lead backend and frontend development with Python and React/TypeScript, and integrate GenAI into production systems.You will ensure coding standards, robust testing, and CI/CD, while guiding Azure deployments...

JPMorgan Chase is seeking a Full Stack Software Engineer to join the Corporate Sector - Data Center Services. You will contribute to building secure, scalable technologies, delivering AI-enabled features, and ensuring high-quality production code within an agile team.The role emphasizes frontend Angular with NGRX, backend NodeJS, and collaboration across...

Steven.com is building the operating system for the creator economy, and its ITO team is hiring to build products from zero to production across the full stack. You will move between existing products, beta products scaling up, and moonshots, turning ambiguous problems into scalable technical solutions.You will prototype fast, run experiments, iterate on...

Bauer Media Outdoor UK is hiring a software engineer to sunset legacy systems and build a new platform for client bidding and real-time data on advertising spaces. You will focus on BA work with some FE work, using React, NodeJS, Typescript, Kubernetes, AWS and more.You will contribute to design, implementation, testing and deployment, shaping features...

OverviewFull Stack Software Engineer – Early-Stage HealthTech/FinTech - London. Permanent | Competitive Salary + Equity | Seed-Stage Startup | AI, FinTech, Healthcare.We are representing a well-funded, early-stage startup redefining financial visibility in the healthcare sector. Backed by reputable investors and founded by experienced operators, the...

Volition in Central London is seeking a Full-Stack Software Engineer to design, develop and continually improve production systems used by real-world clients. The role requires a solid full-stack background with modern practices and strong API design capabilities.The ideal candidate has 3–10 years of experience, hands-on work with Next.js, TypeScript,...

A tech-driven company in London is looking for a Full-Stack Engineer to help build a new platform focused on AI agent costs and margins. You will have full technical ownership of the architecture while collaborating with experienced founders. Ideal candidates should have 3+ years of experience in backend systems, be fluent in Python or TypeScript, and have a...

Select how often (in days) to receive an alert: Senior Software Engineer, Full-Stack Applications - Ratings Technology (London) Requisition ID: 50676 Business Unit: Fitch Group Category: Information Technology Location: London, GB Date Posted: Sep 18, 2026 As one of the world’s top three credit ratings agencies, Fitch Ratings plays a critical role in...

Lindus, a London-based health tech startup, is hiring a software engineer to help power the next generation of clinical trials. Join a fast-moving team in an onsite role with a flexible hybrid arrangement near London Bridge, and contribute to a platform that manages complex trials and brings new treatments to patients faster.You’ll work across frontend,...

About the TeamThe Intelligence & Investigations Engineering team builds systems that detect, analyze, and disrupt abuse across OpenAI’s products. We partner closely with the Child Safety team and cross-functional groups to protect users while advancing OpenAI’s goal of developing AI that benefits everyone.About the RoleAs a Fullstack Engineer focused on...

Salary: £50,000 - 80,000 per year Requirements Extensive Java development experience, including Java 17+ Strong Spring Boot and microservices experience Strong React experience; Angular also considered Experience developing REST APIs Experience with cloud platforms such as AWS, Azure, or GCP Experience with Docker and Kubernetes Experience with CI/CD...

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process. The role This company is building the AI operating system for outpatient clinics....

INCO Broking Limited in London is seeking a Junior Full Stack Engineer to join our growing team. You will develop features for our platform, collaborating with developers, insurance brokers and executives to bring ideas to life.You'll write scalable code in TypeScript, SQL and React, participate in code reviews, and help deploy new releases. A collaborative,...

Clearing Full Stack DeveloperHybrid Working - London -50% a week on site.Financial ServicesLorien's leading banking client is looking for an experienced Full Stack Developer to join a major greenfield technology programme within Financial Services.You will be part of a team building a brand-new Asset Servicing platform, replacing both an existing legacy...

CoinDesk is seeking a Senior Full-Stack Engineer to join the Media Engineering team. You will own complex features across web, mobile apps, and services, with a focus on performance, reliability, and security.You will work with Next.js, React, Node.js, and TypeScript, applying automated testing and DevSecOps principles. Experience with AI tooling and...

Addition is a growing technology consultancy delivering AI and ML solutions to UK government clients. You will lead and craft scalable software across front-end, back-end and data layers, combining hands-on engineering with technical leadership.Expect meaningful impact, modern tech and a supportive team. Hybrid role with one in-office day per week in...

Starling Bank, a leading UK digital bank, is seeking a Full Stack Engineer (ML Ops) in London. The role combines backend Java services with modern frontend work in JavaScript, React and Redux.The position offers a hybrid working model (up to 2 remote days per week) and a base salary in the £70K–£110K range for a permanent role. We value engineers who can...

Fresha in London is seeking a Senior Full Stack Engineer to join our cross-functional team. You’ll own features end-to-end, from the React/TypeScript UI to the GraphQL/API layer and backend services, in a fast-paced environment.You’ll contribute to AI-enabled workflows, ship daily behind feature flags, and collaborate with product, design, frontend,...

Role: Full Stack Senior DeveloperLocation: LondonSalary: Competitive salary and package dependant on experienceCareer Level: Manager (CL7)Please Note: Any offer of employment is subject to satisfactory BPSS and SC security clearance, which requires 5 years continuous UK address history at the point of application.About the jobWe are looking for an...