276 to 300 of 314 React Jobs in London

opportunity to move between them. Job responsibilities Significant contributions to designing and building scalable and performant front-end solutions written in TypeScript using React Working across B2C and B2B features Advocate for and encourage high standards and best practices to maintain high code quality. Providing constructive and insightful feedback … realized by automation. Required qualifications, capabilities and skills Formal training or certification on software engineering concepts and proficient advanced experience Technical: Highly competent at React with TypeScript, with a strong engineering-first mindset, an ability to solve complex problems elegantly with an emphasis on scalability and performance. Adaptability: Thrive ...

Salary £100,000 - 100,000 per year Requirements I am looking for candidates who have proficiency in React, Next.js, and TypeScript. You should have experience with CSS Modules, styled-components, or similar tools. Familiarity with testing frameworks such as Jest, CI... Technologies Architect Blockchain CI/CD CSS ESLint Jest … React TypeScript styled-components JavaScript Frontend More We are pleased to offer a competitive salary in the range of £100k - £140k. This is a fully remote position. #J-18808-Ljbffr ...

build production AI solutions—all within customer environments. You'll work hands‐on-keyboard alongside customer teams, whether you're migrating a legacy React application to App Router, conducting a deep‐dive code audit, or deploying production agents using Vercel's AI SDK. You will be equally comfortable leading … remote‐first with significant travel (25‐40%) to customer sites for embedded engagements. What you will do: Lead complex frontend migrations —modernizing legacy React, Vue, or other frameworks to Next.js, including Pages to App Router transitions, incremental adoption strategies, and large-scale codebase transformations. Conduct technical assessments and code audits ...

Tripled ARR in 12 months Remote‐first (UK) with hybrid London office option Up to £130,000 + equity Tech stack: Typescript/Node, React, GCP/AWS We’re working with a rapidly scaling AI‐native SaaS company that raised an impressive Series B round in 2025. Their platform … solving challenging technical problems while shaping the product experience for thousands of users. What will the Senior Product Engineer do? Contribute across the stack (React/Typescript, Node, GCP), with a strong focus on frontend systems Design scalable frontend architectures to support rapid product growth Lead end‐to‐end feature ...

here to design it, build it, and ship it. 🔧 Tech Stack Design/AI tooling: Claude Code, Codex, Claude Design, Figma Frontend: Next.js 14, React 18, TailwindCSS, Radix UI, Framer Motion State management: Zustand Testing: Vitest Backend (light exposure): Node.js, Prisma, MySQL Infra: Cloudflare R2, AWS S3, Vercel What … . Are keen to build what you design, and excited to learn Claude Code and Codex to do it. Some HTML/CSS or React experience helps, but curiosity and speed of learning matter more. Sweat the details other people miss. Care about UX, performance, and design systems. Communicate clearly ...

Core Web Vitals and reusable platform capabilities. A day in the life Build and evolve customer‐facing and internal web applications using Next.js, React, TypeScript and GraphQL, delivering scalable solutions across multiple products and business domains. Shape the future of our frontend platform by driving architecture decisions, building reusable components … sharing, helping to raise engineering standards and foster a culture of continuous improvement. About You Strong commercial experience building modern, scalable web applications using React, TypeScript and Next.js, with a solid understanding of frontend architecture and reusable component libraries. Deep knowledge of technical SEO, Core Web Vitals and modern rendering ...

ideas to directly shape our app development and products beyond our established work. You will work with a modern tech stack using Next.js, React, TypeScript and Tailwind CSS. You will use your skills for Frontend and Backend technologies built on top of Next.js. You will take ownership of features from … have advanced experience building web apps using React. You are a TypeScript pro, know your way around Next.js, and can implement common and advanced React patterns. You’ve been doing this for 5+ years. Working with git is natural for you. You use AI as a core part ...

Founding Frontend Engineer We're recruiting for a leading AI security start-up who are building an adaptive security layer designed to detect and respond to evolving threats in real time. As a Founding Frontend ...

Founding Frontend Engineer We're recruiting for a leading AI security start-up who are building an adaptive security layer designed to detect and respond to evolving threats in real time. As a Founding Frontend ...

Java Script Works is looking for a skilled CRO Frontend Engineer specializing in React and TypeScript. This full-time position is based in London, United Kingdom, with a competitive salary range of £90,000 - £140,000 per annum. The ideal candidate will have extensive experience in frontend development ...

JPMorgan Chase & Co. in London seeks a Senior Lead Software Engineer to drive the development of a trader-facing Risk Management UI using React and TypeScript. You will mentor teams, own architectural decisions, and deliver secure, scalable software in an agile environment. You will lead code reviews, champion AI-assisted ...

business partners around the world. Job responsibilities Significant contributions to designing and building scalable and performant front-end solutions written in TypeScript using React Working across B2C and B2B features Advocate for and encourage high standards and best practices to maintain high code quality. Providing constructive and insightful feedback … decision making process. Required qualifications, capabilities and skills Formal training or certification on software engineering concepts and proficient advanced experience Technical: Highly competent at React with TypeScript, with a strong engineering-first mindset, an ability to solve complex problems elegantly with an emphasis on scalability and performance. Adaptability: Thrive ...

toward impact. We’d rather ship the wrong thing quickly and learn, than waste weeks polishing what nobody needs. Our tech stack: Primary: TypeScript, React, Node, SQL Frameworks: Express, React‐hooks, Redux, RTK, Mantine Infrastructure: Docker, GCP, Kubernetes, Tracing, Prometheus While familiarity with our stack is helpful, we value your ...

React Developer Location: London, United Kingdom Type: Contract Compensation: £500 - £600 per day Visa sponsorship: Not provided Job Summary React and TypeScript development in a front‐office banking/finance context Front‐office experience highly desirable Exposure to banking and finance domain Key Skills React TypeScript Experience with front‐office ...

critical web application projects for a leading UK retail organisation. You'll design and build modern, high-performance web applications using Next.js App Router, React Server Components (RSC), and Server Actions, delivering scalable solutions across complex business workflows - with strong focus on full-stack development, performance optimisation, and observability. … Responsibilities: Design and build robust web applications using Next.js App Router, React Server Components (RSC), and Server Actions Develop and maintain scalable Back End APIs to support complex business workflows Design and implement MongoDB data models and database schemas Build efficient Server Side logic and integrations across the full application ...

real technical and strategic impact. Own the interface, end to end Build the interface customers open every day and can't imagine working without. React is the core of what customers see and touch — you lead frontend architecture in React and TypeScript, set the quality bar for components, state management … bring that into what we ship. What you'll bring 6+ years of experience building production frontend applications with TypeScript. Deep frontend expertise with React — component architecture, state management, performance, and accessibility. Comfortable enough with APIs and backend basics to ship end-to-end when needed. Experience building AI-driven ...

Experience Design – Vice President London, United Kingdom Tech stack Agile React UI JavaScript HTML5 CSS Understanding Technical Constraints and Opportunities Informed design solutions; Familiar with HTML, CSS, and JavaScript, frameworks such as React, and mobile UI standards. Knowledge and experience working in Agile a plus. About Us J.P. Morgan ...

make smart trade‐offs between speed and polish, knowing when to ship and when to refine Strong fundamental understanding of modern frontend systems – React architecture, state management, performance, accessibility, and scalable UI patterns. If your strengths lean more visual than technical, check out our Product Designer roles instead. Experience translating … class product experiences Drive front‐end execution – pioneering new interaction patterns, micro‐animations, and delightful details that elevate the entire experience Implement features in React/TypeScript with obsessive attention to detail Collaborate with backend, ML, design, and product teams to bring complex features to life in a seamless ...

design and deliver cutting‐edge front‐end systems that power real‐time investment decisions. You’ll be building intuitive, high‐performance UIs in React/TypeScript, with a strong focus on data‐rich visualisations that bring complex trading strategies and risk models to life. This role offers true ownership … operations. What you’ll do: Work closely with Portfolio Managers and Quants to translate trading needs into elegant, performant UIs. Design, build, and maintain React/TypeScript applications with real‐time data visualisation. Own front‐end architecture, ensuring scalability and high performance in latency‐sensitive environments. Collaborate across front office ...

Full Stack Engineer/Technical Lead (Ruby TypeScript React) London/Remote to £130k Opportunity for a full stack technologist to join a highly regarded provider of serverless real-time infrastructure for the Internet that processes billions of messages a day and powers everything from live chat and VoIP calls … senior software engineer with experience of building developer tooling and APIs You have strong hands-on experience with Ruby, TypeScript and React You have experience within a product focussed B2B SaaS environment You have experience of making technical decisions that drive projects and raise the bar You're comfortable with ...

navigating a fast‐moving environment where things aren't always clearly defined Build and maintain user‐facing products across the stack. Today that means React, Remix, and TypeScript on the frontend, and Golang on the backend, but you'll work fluidly across both Collaborate closely with product, design, and other … have a background leaning more heavily one way A curiosity and excitement about using AI tools to build better software faster Familiarity with React, Remix, and TypeScript is great, but not essential Experience setting or influencing engineering practices, not just following them A track record of mentoring or supporting other ...

technical solution: architecture, data model, integrations, agent and workflow design – and ship it in days and weeks, not quarters. Build full‐stack: TypeScript backend, React frontend where needed, integrations, LLM orchestration, evals. Demo early and often. Put working software in front of real users and fold their feedback into … tooling: LLM APIs, tool and function calling, agent frameworks, evals, prompt engineering as a real discipline. Strong with TypeScript on the backend and React (or equivalent) on the frontend. Comfortable with APIs, auth, queues, and integrating with legacy systems. Daily, fluent use of Claude Code, Cursor, or similar – expected ...

help build and scale our product, working across teams and directly with our customers. You will have 5+ years of experience, with expertise in React and TypeScript. You’ve experienced a startup or scale up especially at early stage. You’ve been part of a small squad of high performing … just internally but in our customers' eyes. Someone that thrives in autonomy, responsibility, and building things that truly matter. Tech environment Fullstack (Backend leaning): React, TypeScript (core focus) APIs: Designing and consuming scalable, well-structured services Data: Working with production systems and performance considerations AI: Integrating modern AI models into ...

Frontend Engineer - React/Typescript London, United Kingdom Posted about 1 year ago Tech stack React TypeScript Frontend development Full-stack Qualifications Expert hands‐on experience with TypeScript and React. Can function as a full‐stack engineer (leaning heavily towards front‐end development), working on both client and server‐side ...

Java Script Works is looking for a React Developer to join our team in London. You'll be responsible for React and TypeScript development in a challenging front-office banking and finance context, crucial for our client's needs. The ideal candidate will have strong experience with React, TypeScript ...