remote full-stack engineer - ruby on rails react jobs in London

About Nyxium Nyxium is a London-based deep tech company backed by top-tier investors. We are building an agentic AI and geospatial intelligence platform that supports siting, permitting, impact assessment, and decision-making for complex infrastructure projects, including energy systems, data centers, and other critical infrastructure. Location London Right...

**Senior Java Developer | Payments | Java, Spring Boot, AWS, React | Remote | Up to £85K** We've partnered with a payments company on the hunt for a Senior Java Developer to sit alongside their Head of Technology in a fully hands-on capacity. This is a back-end-heavy full stack role where you'll be spending the majority of your time in Java and Spring...

Full Stack Software Engineer | .NET & React | Remote first (Once a month in London) | £55,000 - £80,000 + Benefits We're partnering with a growing software business that is looking to strengthen its engineering team with the addition of a Full Stack Software Engineer. This is a fantastic opportunity to join a product-focused organisation where technology...

We’re really lucky to have an Engineering team spread across three jurisdictions working on the Hnry product. While that gives us the opportunity to hire great people globally, we’re always keen to hear from those interested in joining our founding team in London. We’re really proud of the team we’ve built so far, and while we’re not actively...

At Ripple, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for financial institutions, businesses, governments and developers, we are improving the global financial system and creating greater economic fairness and opportunity for more people, in more...

At Ripple, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for financial institutions, businesses, governments and developers, we are improving the global financial system and creating greater economic fairness and opportunity for more people, in more...

Starling Bank in London is seeking a Full Stack Engineer (ML Ops) to help build and operate our data and banking platform. The role blends backend Java with modern frontend work in React/Redux and cloud deployments on AWS.You will own features end-to-end, design REST APIs, write clean code, and work in a hybrid setup with up to two remote days per week. The...

Lead EngineerHybrid working - based in the office 3 days a week (Holborn, London)  About us: Tendable is a venture capital-backed, series A health-tech business providing quality assurance and improvement software to health and care organisations across the globe.Our mobile app makes auditing easier and more efficient for frontline staff, engaging them...

Client Server Ltd. in London is seeking a hands-on Full Stack Engineer with strong backend C#/.NET and frontend React/TypeScript skills, plus a keen interest in AI-enabled development. The role focuses on building scalable cloud-native systems and influencing architectural decisions.You will work in a small, agile team, split between three days in our City...

Our consumer business client is seeking a Senior Applications Developer (10+ years) to build and maintain web solutions using Adobe Experience Manager (AEM)Join a development team delivering scalable digital solutions within a well-established consumer-oriented environment. This role focuses on building, customizing, and integrating applications using Adobe...

Wheely is redefining premium transportation across major cities in Europe, the US, and the Middle East. We blend cutting-edge technology with the craft of five-star chauffeuring to deliver an experience trusted by more than 100,000 active riders and 1,200 corporate accounts. We’re a profitable, fast-growing scale-up with $43M raised and over $100M in...

Senior Backend Engineer (Ruby) Role type - Permanent Location - London (Hybrid) About Zuno Zuno is the cutting-edge technology platform powering the success of home heating and cooling experts, BOXT. Zuno is scaling for significant growth by continually developing its proprietary tech stack to empower both our installers and the homeowners of brands such as...

Join Pigment: The AI Platform Redefining Business PlanningPigment is the AI powered business planning and performance management platform built for agility and scale. We connect people, data, and processes in one intuitive, feature-rich solution, empowering every team—from Finance to HR—to build, adapt, and align strategic plans in real time.Founded in...

Senior Frontend EngineerRemote (UK-based) | Full-TimeAbout UsReactive Markets is the 2026 OTC Trading Platform of the Year (Risk.net). Our network handles over $50 billion in daily trading volumes across FX, Equities, and Cryptocurrency, connecting 40+ of the world's leading liquidity providers.We build trading systems that operate at the edge of what's...

Starling Bank in London, UK seeks a Full Stack Engineer (ML Ops) to join our data-driven fintech team. Build scalable services, REST APIs, and frontend with React/Redux, leveraging Java and AWS in a hybrid setup.The role offers a base salary of £70K–£110K, permanent contract, and hybrid working up to 2 remote days per week. Visa sponsorship is not...

A leading FinTech company is seeking a Full Stack Node.js/React Developer to shape the future of global payments. You will lead the frontend transformation, creating user-friendly interfaces and innovative financial applications. The ideal candidate has strong skills in Node.js and React, with a focus on security and user experience. This position allows for...

Senior Full Stack Engineer TryHackMe is a fast‑growing online cybersecurity training platform that makes learning and teaching cybersecurity easier through gamified exercises and challenges. With over 5 million community members, we’re expanding as an AI‑first company. Your role will involve everything from maintaining the current code base to...

A little about usincident.io is the AI software reliability platform trusted by engineering teams at Netflix, Etsy, and 2,000+ companies who can't afford downtime.The stakes are real, the talent is insane, and somehow it's a genuinely lovely place to work. We all pull our weight, go the extra mile, and put in the bit of magic most companies don't have time...

About Nyxium Nyxium is a London-based deep tech company backed by top-tier investors. We are building an agentic AI and geospatial intelligence platform that supports siting, permitting, impact assessment, and decision-making for complex infrastructure projects, including energy systems, data centers, and other critical...

PlannerPal is seeking a Senior Full-Stack Engineer to bridge application development with a strong background in DevOps and enterprise-level engineering. You will design and build key features, develop CI/CD pipelines, and deploy AI-enabled services on AWS.The role offers remote-first work within the UK and close collaboration with founders during a defining...