full stack ruby engineer jobs in London

Ebury is building an AI-powered financial crime investigation platform. We seek a Senior Full-Stack Engineer to scale the system from React frontend to Python FastAPI backend and integrate LangGraph-based AI workflows.You will mentor teammates, shape architectural direction, and work across Product, Design and Compliance to deliver impactful features. Join a...

Enfint ищет опытного разработчика полного стека для автоматизации сетевых технологий и продуктов в рамках инфраструктуры. Вы будете вносить вклад на всех уровнях приложения, работать с RESTful API и...

Liberty Global Plc seeks a senior platform engineer to design, build and own platform capabilities across frontend, backend, APIs and cloud infrastructure. You will lead architecture reviews, drive scalable and secure designs, and deliver production-grade software from concept to deployment and support.You will evaluate complex technical challenges, guide...

Autonomai Recruitment's client, a well-established fintech, is expanding its London engineering team. You will own features across the full stack, from backend services to the UI, and work closely with product, design and the business.Join a small, senior group with end-to-end ownership; contribute to APIs, data services, and platform infrastructure as the...

Faculty AI is seeking a Senior Full Stack Software Engineer to anchor our Professional & Financial Services team. You will lead the development of platforms that visualise data science insights and bridge AI research with production-grade software.You will own the full tech stack, drive architectural decisions, and mentor others to deliver scalable,...

Certus Recruitment Group is partnered with a London-based fintech building a regulated stablecoin and digital payments platform. We are seeking a Senior Full Stack Software Engineer to join at an early stage and help build the application, financial infrastructure and settlement technology behind the platform.This is a hands-on role, collaborating with the...

mthree is hiring a Full Stack Developer to work with a tier-one global investment bank in London. You will join the PnL Control group within Finance Technology, contributing to an accounting system that produces PnL and Balance Sheet reporting for secured funding transactions.The role involves building the accounting platform with Java, Scala on Spark, while...

Runna is seeking a senior software engineer to join the Train Team, collaborating with modelling/AI experts to integrate features into the Runna training platform. You’ll work closely with the CTO and leadership to shape the engineering roadmap and deliver impactful products for runners.You’ll contribute across frontend and backend, shipping end-to-end...

Vanguard is seeking a Senior Full Stack Software Engineer to design, develop and optimize front office applications within the GIFS team. You will collaborate directly with portfolio managers and product owners to deliver high-impact software.The role requires deep experience in frontend and backend technologies, cloud platforms, and distributed...

Zühlke Group is seeking a Senior Software Engineer in London to join a high-performing engineering squad. You will own backend services in Kotlin or Java, contribute to API design, and deliver features with robust testing and scalable frontend interfaces.You will work with React/TypeScript on the frontend and leverage cloud and container technologies to...

Eames Consulting Group is seeking a Senior Full Stack .NET Developer for a London-based hybrid role on a 6-12 month contract. You will design, build and modernise critical apps across front-end and back-end, leveraging .NET, Angular, AWS, and AI-assisted tooling to boost productivity.You will work across the full SDLC, containerise services with Docker, and...

Eames Consulting Group in London is seeking a customer-facing Lead Product Engineer (Full Stack) to design, build and deliver digital products using the Microsoft technology stack. This hands-on role works directly with customers to understand challenges, shape solutions and drive outcomes.You will combine strong engineering skills with product thinking,...

Scale is seeking a Staff Full-Stack Software Engineer (Forward Deployed) in London, UK, to collaborate with public sector counterparts and rapidly build full-stack AI applications. You will help convert ambiguous requirements into robust architectural roadmaps and guide onsite implementations, ensuring scalable and secure systems.Ideal candidates bring 10+...

Futureheads Recruitment Ltd in London is seeking an experienced Python-focused engineer for a 6‑month contract outside IR35. You’ll own substantial pieces of work, ship features quickly, and collaborate across the business in a hands-on, full‑stack role.The team operates on a weekly delivery cadence, uses AI coding tools, and allows for three days per...

Capgemini is hiring a highly capable Full-Stack JavaScript/TypeScript engineer in London hybrid roles. You will work with innovation consultants, UX/UI designers and engineers to shape opportunities using emerging tech, leading projects from discovery to pilot, and delivering scalable solutions that balance speed and quality for real business value.You will...

Open is seeking a hands‑on Senior Full‑Stack Engineer to build UK partner integrations and evolve the Open Embedded platform. You’ll work with a small UK team, in a hybrid setup, shipping changes across the stack from quote through to claim, with AI‑native patterns and a focus on reliability.You’ll report to a Senior Full‑Stack Engineer and...

Liberty Global is seeking a Lead Full Stack Engineer in London to join the AI Platform team. You will work directly with the VP Software Engineering to design and evolve platforms powering AI-driven experiences across our business.This hands-on leadership role involves shaping architecture, standards and production software that scales securely for millions...

A pioneering technology firm in London is seeking a Product Engineer to develop AI-native solutions. The ideal candidate will possess excellent software engineering skills and intuition for LLMs, with responsibilities including full-stack development and prototyping to enhance user experiences. Work includes collaboration with real users and shaping product...

QuantumLoopAI in London is seeking a skilled Full Stack Developer to join our engineering team. You will work across the entire application stack, shipping features end-to-end and making architectural decisions that improve NHS patient access.You will collaborate with product, clinical, and commercial teams to translate NHS needs into reliable software,...

sees.ai is building autonomous drone technology to change how infrastructure is inspected and managed. We deliver large-scale autonomous inspection programmes for National Grid and other operators, backed by Boeing and with a founding team from Apple, CERN and McLaren F1.We solve hard problems in autonomy, aviation and regulation and now tackle scale with...