full stack javascript engineer jobs in London

This is one of the world’s top algorithmic trading firms, looking for an experienced full stack developer to architect and design enhancements for global web-based systems using mainly Python and React.Working closely with teams across the firm – Algo, Business Development, Middle Office, Trading Tech – your code will impact business logic, provide...

JUXT is seeking software engineers to join a Production Support team for an Investment Banking client. You will help build high-quality Java systems and React frontends, contributing to greenfield projects within a small, focused team.Joining four existing engineers, you will work on deploying platforms for internal engineering groups and explore...

MBN Solutions is partnering with an early-stage AI business to hire a Senior Product Engineer who wants a direct hand in shaping the product. You’ll work closely with the founders and customers, taking meaningful problems from first conversation through to production.You’ll help decide what to build, work across the stack and see how your decisions...

White Swan Data is seeking a skilled Full Stack Engineer in London to join a cross-functional team. You will work across UI development, backend microservices, and data platforms, contributing to a cloud-first architecture using GCP, BigQuery, and PostgreSQL.The role emphasizes ownership, collaboration with stakeholders, and delivering reliable systems from...

OpenAI is seeking a full-stack Software Engineer to build internal tools and data pipelines that power lawful data access workflows and Legal Operations. You will work across product and data systems to make authorized retrieval and case handling accurate, efficient, and auditable.This role suits someone who translates ambiguous requirements into durable...

Are you a talented JavaScript Engineer looking to make a significant impact in the energy space? Join a fast-growing start-up, which recently secured 500,000 in funding and has ambitious plans to expand across Europe and the US within the next few months! My client is seeking a skilled Mid/Lead JavaScript Engineer to be the first engineering hire, working...

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,...

Applied Data Science Partners Ltd. is seeking engineers to design, build, and deploy robust software solutions. You will work on data pipelines, backend services, and APIs to ensure scalability and performance, with a focus on code quality, security, and best practices. Knowledge of cloud deployments and Docker is essential.You will mentor juniors, review...

HelloKindred invites applications for a Java Full Stack Developer – Broker Dealer, in a hybrid UK-based role. You will design, develop, and maintain scalable enterprise apps supporting critical business functions with a focus on Java backend and modern front-end components.Experience in UK broker-dealer and capital markets is essential, along with...

Full Stack Engineer (React) - Trade Finance and LendingLocation: London & BirminghamCorporate Title: Assistant Vice President Trade Finance and Lending (TF&L) is one of the leading business departments in the Corporate Bank, working with clients around the globe. It has critical dependencies on IT platforms to service the Bank’s clients. You will work...

Devonshire Hayes Recruitment is seeking an experienced Full Stack Developer for a greenfield trading platform. You will lead on responsive, real-time trading interfaces using Next.js and React, while contributing to backend services, APIs and integrations.The role is a 12-month fixed-term contract with 3 days onsite per week, in a fast-paced Agile...

AKA UK приглашает опытного PHP-разработчика в отдел Digital. Ваша работа охватывает полный стек веб-приложений, с уклоном в back-end, поддержку Linux-инфраструктуры и внедрение CI/CD.Требуются знания PHP 8.x, WordPress,...

iProov is seeking an experienced Full Stack Engineer for Web-Innovation in London. You will design APIs, adapters and user-facing flows that connect iProov’s verification services with external systems, balancing security and usability in a hybrid work model.You will explore third-party platforms, implement integration patterns, and collaborate across...

AKA is a global entertainment agency seeking a hands-on full-stack developer with a back-end bias to join the Digital department. You’ll ship websites, web apps and emails, collaborate with designers, and help maintain cloud Linux infrastructure.The role offers growth towards seniority, opportunities to work across campaigns, and a hybrid working model...

Hayfin Capital Management LLP is hiring a Full-Stack Engineer to build our analytics workbench, enabling data-driven analysis and decision making across the business. You will own the in-house analytics platform, work across the full stack, and coordinate with an offshore vendor team to ensure timely delivery.The role emphasizes hands-on enterprise software...

Harnham is hiring a Full Stack Engineer (React/TypeScript/Java) in London with hybrid working. The role involves 65% frontend and 35% backend, delivering features for a WealthTech platform and shaping technical decisions in a modern cloud-native environment.You will work in a cross-functional squad, focusing on frontend while contributing to backend services...

Admanage.ai is building the Cursor for ad management and empowering brands to launch hundreds of ads quickly across major platforms. This high-ownership full-stack role lets you design and deliver features across the entire product, from database schemas to UI, with a focus on performance, testing, and robust architecture.You'll collaborate directly with the...

Luxoft in City of London is seeking a highly technical, hands-on Java developer to maintain and evolve backend and web applications within a trading platform. You will work with product owners and QA to deliver robust software across markets and time zones.Requirements include 8+ years of software engineering, strong Java 21, Spring Boot, REST APIs, React...

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...