JavaScript Developer jobs in City of London

Job Description React Native Developer - Hybrid - Outside IR35 | React Native | FinTech | JavaScript | TypeScript We’re working with a fast-growing FinTech in London that’s building next-generation mobile products used by thousands of customers daily. They’re looking for an experienced React Native Developer to join the team on a contract basis, contributing to high-impact features across their...

Job Role: Software Engineer, Frontend Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern JavaScript stack, your primary focus will be on coding, testing, and enhancing the...

We are currently looking for creative and technical graduates to join a leading financial institution as Graduate Software Developers in the summer 2026. With a perspective on actions today that shape tomorrow. This firm is an innovative, global trading firm. In an ever-changing world, they pride ourselves in offering a unique service. They strive to be the best in their field through exceptional...

ServiceNow Platform DeveloperLocation: UK (Hybrid 2-3 days onsite)Salary: Up to £80,000 + BenefitsAbout the RoleWe are looking for a ServiceNow Platform Developer to join our clients team delivering modern, scalable ServiceNow solutions across Customer, Technology, and Employee Experience platforms.You'll work closely with senior architects and consultants to design, configure, and deploy...

Job Description 🚀 Backend Engineer (Mid/Senior) 💻 Stack: Node.js, Typescript/Javascript, PostgreSQL, RESTful APIs, GraphQL, AWS 🌐 Location: NW London, Hybrid 💰 The Package: £60,000 - £65,000+ generous holidays My client, a leading DTC e-commerce brand just got huge investment to scale it's digital team. You'll be joining at the perfect moment - established product, proven revenue, but now...

About Aero A digital experience company, we sit at the intersection of insights, creativity and technology, crafting digital experiences that transform business performance. We’re a small, fully remote team with big ambitions. We work hands-on with our clients, giving our teams genuine ownership of their work. Every project you touch will be seen by thousands of people and will directly...

Job Description 6 month rolling contract - Inside IR35 - Investment Banking Key Responsibilities · Participate in an agile based software development life-cycle including technical analysis, documentation, development, testing and code reviews. · Collaborate with the production support team for release and maintenance of the components. · Work closely with the other developers in determining...

You will also be working very closely with their customers and this is experience that they really value. If this is of interest, please get in touch ASAP - will be moving quickly!

You will have a primary platform focus, while also working across both platforms as needed to: - Share knowledge and best practice - Support continuity and resilience - Help direct effort toward the areas that need it most

Role: Software Developer (React) – Up to £120,000 + Bonus + Package Make sure to apply with all the requested information, as laid out in the job overview below. Salary: Up to £120,000 + Bonus + Package Location: London (Hybrid Working) Skills: React as a main language (modern JavaScript / TypeScript) This firm is an elite technology company with exceptionally high standards, known for...

You will be comfortable with Django/Flask, Gitlab and have experience of container infrastructure. This is a three month rolling contract that will require you in the office, just outside London twice a week at rate of £500 a day (inside IR35). The role will involve contributing to the design and feature requirements, then developing the required changes within an existing network automation team.

Are you a talented, super-ambitious full-stack developer? Excited by building solutions to real-world challenges? Motivated by owning shares in a high-growth business? Their mission is to unify the fragmented landscape of school technology through intelligent, human-centred design. By replacing disconnected silo systems with one seamless platform, they restore joy to teaching, strengthen...

SeniorDeveloper(Node/React) Areyouapragmatic,innovative,andself-motivatedproblemsolverwithapassionforbuildingscalable,high-performingsoftware?We'relookingforaSeniorFullStackEngineer,withstrongskillsinNodeandReact,tojoinahigh-performingproductteamworkingonaglobal,high-trafficeCommerceplatformhandlingthousandsoftransactionsdaily. Skills, Experience, Qualifications, If you have the right match for...

Full Stack Engineer – New Launch Hedge Fund (L/S Equity) Location: London Type: Full-time (5 days per week on-site in Victoria) A newly launched fundamentally driven long/short equity hedge fund, focused on the European Industrials sector, is seeking a talented Engineer to join its growing London-based team. The firm, currently composed of senior professionals from top-tier hedge funds including...

Job Description Title: Software Engineer in Test Company: Specialist Technology / eCommerce Platform Location: London – 2-3 days a week Salary: up to £60,000 + benefits Tech essentials: Javascript and either Cypress or Playwright Interview process: 3 stage interview process Why should you be interested in this opportunity? - You’ll be part of a dynamic multi-disciplinary team, taking...

You will work closely with product managers, designers, and other engineers to solve complex problems and create intuitive solutions that help simplify financial workflows for our users. You’ll have the opportunity to own critical features and contribute to the overall architecture of our platform.

Job Description COMPANY DESCRIPTION HSSMI Consulting Ltd is a sustainable manufacturing innovation consultancy, focusing on helping manufacturers scale operations, improve productivity, and adopt circular economy practices. Since 2012, HSSMI has collaborated with government bodies, established manufacturers, and start-ups to deliver innovative and sustainable solutions. The company's expertise...

Job Description Job Title: QA Automation Engineer (Python / PyTest / Cosmos DB)-Banking Client Exp Required Location: London- 3Days/week Onsite Duration: 6months+ Contract Inside IR35 500GBP/Day Role Overview We are looking for a QA Automation Engineer to join a Pod-based delivery team working on critical applications and data platforms within a global financial market's environment. The...

You will play a critical role in assuring the quality, reliability and robustness of digital solutions across a wide range of client engagements.

You will be responsible for designing, implementing and maintaining high-quality automated testing solutions, providing confidence that systems meet functional and non-functional requirements across accessibility, performance, security and integration.

Job Description Senior Software Engineer (London, Full-Time) About Birl Launched in 2024, Birl has quickly become one of the UK’s most exciting circular commerce startups, redefining how resale and recycling can drive growth rather than cost. Birl’s plug-and-play platform integrates directly into a brand’s e-commerce site or in-store system, enabling customers to trade in pre-loved products...