full stack javascript engineer jobs in London

Sreeyam Soft Pvt Ltd is searching for a Senior Full Stack Developer to lead the development of their flagship enterprise client platform, catering to FTSE 250 customers. The role requires 5+ years of experience and a proven record in software engineering and product delivery.The ideal candidate will mentor a team of engineers and work collaboratively with...

IFS is seeking a senior software engineer to design, build, and own scalable cloud-native systems. You will work across the stack, shaping API-first architectures and AI-enabled features that drive sustainability initiatives and ESG data capabilities.You will lead technical discussions, mentor engineers, and partner with Product, Design, AI, and Platform...

Spotify is seeking a Senior Fullstack Engineer to join Groove, a platform that enables planning, collaboration, and execution across the company. You will build end-to-end features across frontend and backend, using React, TypeScript, Java, GraphQL, PostgreSQL, and Google Kubernetes Engine (GKE).You will work with product managers and designers to translate...

TechTree is seeking a Founding Engineer to build end-to-end features in London, joining an in-office team shaping an AI-driven recruitment platform. You’ll own major components from concept to production and collaborate directly with the founders.You’ll work across frontend, backend, and infrastructure, taking ownership in a fast-paced startup....

Oho Group in London is seeking a Python Full Stack Product Engineer to help shape and develop an exciting product using Python, TypeScript and React. You will join a small, talented team and have the chance to drive AI-powered features from concept to production.We want a product-minded engineer with at least 2 years of experience, who thrives in a startup...

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,...

Focused is seeking an Agent Engineer (LangChain) in London to drive AI-enabled software delivery. You will lead end-to-end development across backend services and frontend interfaces, pairing daily to raise quality.You will guide architectural decisions and collaborate with product managers, designers, and stakeholders to create valuable AI-powered...

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...

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...

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...

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...

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...

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...

Lyst is seeking a Senior Full-stack Engineer to join the Shop Experience squad in our Product Development tribe. You will design and build customer-facing features across the full stack using React, TypeScript, and Python (Django), influencing architecture and engineering practices.You will collaborate with Product, Design, Analytics, and QA to ship...

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...