2 front end developer jobs found in London

Contract Full-Stack JavaScript Developer (AI Platform) Location: 3 days per week in London Office Duration: 4 weeks with a longer term extension afterwards. IR35 Status: Outside IR35 Rate: £500p/d - £600p/d Opus is partnering with a cutting-edge FinTech start-up to secure a Contract Full-Stack JavaScript Developer . You'll be joining a small, high-calibre team building a platform to improve workflows within the FinTech space. They have a genuinely interesting problem at the intersection of Front End engineering, Back End systems, and applied LLM tooling . This is a true 0-1 build , ideal if you enjoy ownership, clean abstractions, and shipping product quickly. What You'll Be Working On Building and extending agent-driven workflows. Developing context management and LLM entry points. Only application-layer LLM integrations, not model training) Expanding slide generation functions and data structures. Full-stack feature development, with a Front...

Full Stack Developer (TypeScript / React / Node.js) – DV Cleared Contract | £600–£650/day | Outside IR35 We’re supporting a high-profile programme within the secure government space and are looking for an experienced DV Cleared Full Stack Developer to join an established delivery team. Key Details: Rate: £600–£650 per day (Outside IR35) Clearance: Active DV required Start Date: End of April Location: 1–2 days onsite per week (UK-based) Interview Process: 2 stages Responsibilities: Build and maintain scalable full stack applications using TypeScript, React, and Node.js Develop secure, high-performance APIs and front-end interfaces Deploy and manage applications within AWS cloud environments Collaborate with cross-functional teams in an Agile delivery setting Contribute to architecture decisions and best practice engineering standards Required Experience: Strong commercial experience across TypeScript, React, and Node.js...