full stack javascript engineer jobs in London

Data Science Festival is seeking a .Net Developer to take ownership of a core product platform that evolves with the organization. This senior role is primarily focused on enhancing the platform to deliver interactive experiences.You will closely collaborate with product, design, and engineering teams to improve features and security while integrating AI....

InnoCraft (Matomo) is building privacy-first analytics features in a fully remote UK role. You will own innovation from concept to deployment, collaborating with CTO and senior engineers to deliver production-ready solutions that integrate into Matomo’s core platform.We seek a seasoned Full Stack Engineer with 3–5 years of backend PHP/Python and frontend...

FlexTrade Systems is a provider of customized multi-asset execution and order management trading solutions for buy- and sell-side financial institutions. Through deep client partnerships with some of the world's largest, most complex and demanding capital markets firms, we develop the flexible tools, technology and innovation that deliver our clients a...

IFS is adopting cutting-edge AI-driven industrial emissions solutions and is seeking a Lead Software Engineer to shape scalable cloud-native platforms. The role spans front-end and back-end work with React and GoLang, emphasizing API-first design, reliability, and DevOps practices.You will lead technical decisions, mentor engineers, and collaborate across...

JPMorgan Chase is seeking a Senior Lead Full Stack Software Engineer within Cybersecurity and Technology Controls. You will lead a team delivering scalable front-end and back-end solutions, mentor engineers, and drive best practices across UI/UX and data pipelines.You will collaborate with product, design, and backend teams to ensure robust, secure software...

B4B Payments, part of the Banking Circle Group, is seeking versatile engineers to own features end-to-end across the full software development lifecycle. You will design, build, test and ship software in a regulated payments environment, using AI-assisted delivery and a polyglot stack (Ruby, Node, Go) on AWS.This hybrid London-based role may accommodate...

Runna is building the #1 training platform for runners in London. We’re hiring a Staff Software Engineer (Full Stack) to provide architectural direction across multiple squads and drive engineering excellence in a fast‑paced, mission‑driven environment.You’ll mentor engineers, define scalable solutions, champion AI in our SDLC, and own end‑to‑end...

Viasat is seeking a highly skilled Full-Stack Engineer to join our data-driven product team. You will develop and shape platform ecosystems, build web portals, automated document systems, and cloud applications that process billions of records.You’ll contribute to architectural decisions, integrate BigQuery data pipelines, Salesforce, and enterprise...

ARC IT Recruitment is partnering with a fast-growing marketplace tech business in Greater London to hire a frontend-focused developer. You will start with a strong React emphasis, working on high-traffic features and state management, with a clear pathway toward a balanced React/Node.js stack.A mobile app is on the roadmap, offering future expansion...

JPMorganChase is seeking a Software Engineer III in London to own end-to-end delivery of secure, full stack features. You will design, implement, and operate services built on microservices, Kafka, and CI/CD pipelines, while driving performance, resiliency, and secure coding practices across production systems.Expect collaboration across teams, design...

Reelables in London (N1, hybrid) is hiring a Full Stack Engineer to join our product engineering team. You’ll work across the stack, delivering customer-facing features end-to-end—from intuitive user interfaces to APIs and data models that power real-time tracking.You’ll own features, collaborate with customers to translate operational needs into...

Hawksworth is recruiting a Full Stack AI Engineer to join a growing technology company building a new AI-native digital platform for the Energy and Oil & Gas industry. This is a hands-on role working on a platform that will integrate with some of the world’s largest Energy organisations.We’re seeking an experienced Full Stack Engineer with strong modern...

Holt Executive Ltd. is seeking a hands-on Full Stack Software Engineer to design, develop and enhance data-driven applications and cloud platforms.You will work across backend services, APIs and frontend interfaces, applying Python and TypeScript in a cloud-centric stack. The role involves building AI-enabled features, integrating with data pipelines, and...

Square One Resources is looking for a Full Stack Developer proficient in Java (Spring Boot) and Angular (17+) to join an agile team. The role involves designing and maintaining scalable cloud-native applications, implementing robust UI management, and ensuring high-quality software delivery.The ideal candidate will have over 5 years of experience in Java,...

A leading technological organization is hiring a Senior Fullstack Engineer with a backend focus to join their remote team. This role involves core product engineering on the Feeld mobile app and backend systems, requiring extensive backend development experience with TypeScript and AWS technologies. The company promotes an inclusive work culture, offering...

Liberty Global Plc is seeking a hands-on Full Stack Engineer to design, build and evolve AI-first telecom platforms serving millions of customers across countries. You will work with the VP Software Engineering to translate architectural direction into production software, balancing performance and security.You will contribute across backend, frontend, APIs...

We’re looking for a Lead Python Full-Stack Engineer (AI Integration) to join our team in the United Kingdom in a hybrid working mode. In this role, you will lead the design and delivery of enterprise-grade solutions, combining backend development, modern front-end capabilities and AI/ML integrations in a cloud-native environment. You will drive...

Smart Communications is seeking an experienced full stack developer to help build and scale our enterprise-grade customer engagement platform. This remote role offers occasional visits to our Covent Garden office, and a highly competitive salary.You will own features from conception to production, collaborate with product management, and contribute to a...

Runna is seeking a Staff Software Engineer (Full Stack) to drive the technical success of the platform across multiple squads. You will provide architectural direction, mentor engineers, and champion scalable, secure solutions while leading end-to-end delivery of major initiatives.You will shape the technology strategy, collaborate with Product and Design,...

A technology-driven organization based in London is seeking a Full Stack Developer for a full-time permanent role. The candidate will develop scalable APIs and maintain web applications while collaborating closely with teams. Ideal applicants have over 4 years of experience, outstanding skills in both frontend and backend technologies such as React and...