6 of 6 Permanent JavaScript Engineer Jobs in London

Frontend Systems Engineer – DataGrid & Visualisation Libraries | London (Hybrid) £150,000 – £200,000 + package Most engineers build applications. This team builds the components those applications rely on. I’m hiring for a developer tools company building widely adopted JavaScript components used in data-intensive applications across global enterprises … Building features end-to-end — from design through to release Shaping the direction of widely adopted developer tooling What they’re looking for Strong JavaScript and TypeScript fundamentals (framework-agnostic mindset) Experience with a statically typed language (C++, C#, Java, Python, etc.) Deep understanding of algorithms, data structures ...

application - though there's no obligation to do so now. PURPOSE OF THE ROLE We're looking for a talented senior software engineer to join the Audio Mobile Business Layer team in London, building REST APIs in TypeScript Our team maintains the codebases and associated AWS infrastructure that power … Sounds APIs on a Scala/EC2 based stack. We are transitioning our stack towards an in-house JavaScript/TypeScript platform and framework we will share with BBC News and iPlayer. As a senior software engineer, you'll play an important role in developing our team ...

researchers. This includes curating code examples, providing precise solutions, and making corrections across the full stack — in Python for backend and ML workflows, and JavaScript (React, Node.js) for frontend and API layers, alongside C/C++, Java, Rust, and Go. You will evaluate and refine AI-generated code … Typical Day Look Like? Work on AI model training initiatives by curating code examples, building solutions, and correcting code across both Python and JavaScript (React, Node.js), with additional work in C/C++, Java, Rust, and Go. Evaluate and refine AI-generated code across backend and frontend contexts ...

researchers. This includes curating code examples, providing precise solutions, and making corrections across the full stack — in Python for backend and ML workflows, and JavaScript (React, Node.js) for frontend and API layers, alongside C/C++, Java, Rust, and Go. You will evaluate and refine AI-generated code … Typical Day Look Like? Work on AI model training initiatives by curating code examples, building solutions, and correcting code across both Python and JavaScript (React, Node.js), with additional work in C/C++, Java, Rust, and Go. Evaluate and refine AI-generated code across backend and frontend contexts ...

Lead & Staff JavaScript Engineers | Full Stack | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-150k + Equity | 3 days hybrid in London Opportunity: We're supporting a hyper-growth fintech client that is also tech-for-good. They’ve got big hiring plans for the year … technical architecture as they continue to scale their business and expand into new markets. What You'll Be Doing as a Lead & Staff JavaScript Engineers | Full Stack | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-150k + Equity | 3 days hybrid in London ...

want to join a global high frequency trading firm and have real ownership? We’re looking for a sharp, product-minded engineer to help scale a fast-growing platform used across the company. You’ll work across frontend and backend systems, solve performance challenges, and play a key role … shaping the architecture of a complex, high-impact product. You’ll thrive here if you enjoy: Building with JavaScript/TypeScript and Node.js Owning meaningful technical problems end-to-end Improving large-scale, data-heavy systems Working closely with users and seeing your impact quickly Refactoring and optimizing systems ...