1 to 25 of 34 Front-End Developer (Client-Side Developer) Jobs in the City of London

Job Title: Frontend Engineer – React/TypeScript/Next.js Location: London (Hybrid – 2‐3 days in office) Salary: £70,000 – £75,000 + Equity About the Company You’ll join a fast‐scaling SaaS business that’s redefining how enterprise More ❯

drive to succeed paired with a continuous hunger to learn. Leadership - You are trusted, empathetic, accountable, and empower others around you. Primary responsibilities Collaborating with designers, writing front-end code and unit tests, working on the front-end architecture Spearheading the development of our frontend stack, architecting, and building frontend projects Being … with user-experience and design team Designing and maintaining JavaScript libraries, making sure they support the creative and engineering standards of BlackRock Keeping abreast of the new front-end web development technologies; integrate them with the existing systems Understanding and supporting existing systems, and resolve operations issues while working with other engineering staff located across the … Being passionate about technology, with personal ownership for the work you do Essential skills/experience Is a must: 4+ years hands-on development experience on the front-end development with single page application frameworks like Angular, React. Hands on experience in working with TypeScript. Demonstratable experience in working with and designing REST APIs Knowledge and More ❯

Experience: React.js, Typescript, Azure Role Description: • Bachelor’s degree in computer science, Information Technology, or a related field (or equivalent work experience). • Proven experience as a Front-End Developer with a focus on React.js and Typescript. • Familiarity with C# and .Net. • Strong proficiency in JavaScript, ES6/ES7, and related front More ❯

seen by thousands of people and will directly influence how high-profile brands connect with their audiences. Who we’re looking for We’re looking for a front-end developer who’s motivated, curious, and excited to create impactful e-commerce experiences. You’ll be joining at an early stage, which means … of modern JavaScript Ability to write well-structured, semantic, and accessible HTML Confidence writing framework-agnostic, performance-focused JavaScript Awareness of WCAG accessibility guidelines Solid understanding of front-end performance best practices Strong attention to detail when building polished, complex interactions A positive, problem-solving mindset and broad technical curiosity Experience with modern web tooling (transpilers … of modern and emerging browser APIs Familiarity with progressive enhancement principles Nice to have Not essential, but any of these would be a bonus: Experience with a front-end/full-stack framework like React or Remix Experience with a back-end language, framework, or backend platform like Supabase Experience setting up or running More ❯

I'm working with a systematic trading firm with multiple successful strategies operating globally. They have a trading team currently in need of a front office engineer to focus on real time UIs and UX development for trading More ❯

Senior Frontend Engineer £100K - £120K base + meaningful equity (think early-stage upside, not crumbs) London, onsite 4 days per week (non-negotiable) A well-funded, London-based AI startup (Series A, backed by tier 1 funds and some very More ❯

Senior Frontend Engineer London (Hybrid) Bright Purple are delighted to partner with an innovative, sustainability-focused technology company that is transforming how major organisations understand and reduce their environmental impact. Due to continued growth and enterprise demand, they’re looking More ❯

BettingJobs are working with an AI-powered B2B marketing company based in London . They are looking for a Frontend Engineer to join their team. Responsibilities: Manage the company’s frontend portal, where users interact with the system. Collaborate with More ❯

💻 Frontend Engineer — Deep Tech AI Startup London (Hybrid/Remote UK) | High Compensation + Equity 🌍 The Mission Atarus is partnering with a venture-backed AI startup that’s redefining how video data is processed, understood, and acted on . Their More ❯

We are seeking a senior, creative Front End Developer (UI/UX Developer) to join a client in The City of London. This role will focus primarily on UI/UX design and development (60%) while also contributing to backend and full-stack solutions (40%). More ❯

Frontend Engineer | Fintech (Buy-Side) | London Location: Marylebone (on-site – 5 days/week) Stage: Early/Stealth Product: B2B Fintech Platform for Buy-Side Institutions A well-backed stealth fintech is hiring a Frontend Engineer. More ❯

Senior Frontend Engineer £60k-70k | London | Hybrid Working The Opportunity Our key client is revolutionising content management for the world's biggest retail brands. They're a UK-headquartered scale-up backed by leading private equity, working with More ❯

The ideal candidate will be responsible for designing, developing, testing, and debugging responsive web and mobile applications for the company. Using JavaScript, HTML, and CSS, this candidate will be able to translate user and business needs into functional frontend design. More ❯

Dunbar Brown Group are excited to be working retained with our London based customer. We are looking for a Senior Front End Engineer to join a growing team for a business that is a market leader More ❯

💫 Company | B2B, Deep Tech, AI 📏 Size | 10 people 🌱 Stage | Seed 🧢 Role | Frontend Engineer 🪜 Level | Mid-Level ✨ Tech | TypeScript, React, TailwindCSS, WebGL, React Native 📍 Based | Spitalfields, London 💻 Working | hybrid (3-5 days a week in-office) 💰 Offer | £60-75k + More ❯

Contract | Staff Frontend Software Engineer | £600-£800/day Outside IR35 React Software Engineer £600-£800/day Initial 6 Month Duration Outside IR35 Hybrid - Central London (3 days a week) We are partnered with a well-funded scale up More ❯

Founding Engineer | AI Startup | London (Hybrid) I’m working with a profitable AI startup backed by fresh funding looking to bring on an early hire Frontend Engineer. You’ll be building and scaling complex interfaces in Vue and TypeScript , driving More ❯

I am currently working with leading digital agency in Central London who are looking for an experienced Typescript Engineer to join their growing team! The company work with a wide variety of FTSE clients across different industries, focusing on creating More ❯

UI/UX Designer & Frontend Developer – Mobile, WCAG, Adobe CC, HTML, CSS, Javascript, Blazor Outstanding opportunity to join this global enterprise and famous brand within the ‘magic circle’ of the legal sector. From a technology perspective, this organisation is a leader in its domain, significantly investing in AI and automation within an established cloud native (Azure … emerging AI powered tools being built in house. Key Responsibilities: Design and implement responsive, user-friendly interfaces for Mobile, SaaS and Microsoft Word Add-In solutions Develop front-end components using HTML, CSS, TypeScript, and Blazor within a .NET environment Collaborate with product managers, engineers and end-users to translate requirements into elegant UI … documentation and UI component libraries Required Skills & Experience: Proven creative experience in UI/UX design and wireframing tools like Figma, Blasamiq or Adobe Creative Cloud Strong front-end development skills in HTML, CSS, TypeScript, and JavaScript Hands-on experience with Blazor and .NET (C#) Extensive experience with Mobile & SaaS product development and cloud deployment (Azure More ❯

Senior Frontend Developer (React, FinTech) - Permanent - London (2 days a week) - £80 - 100k per annum Our client is a technology company within the financial services sector seeking a Senior Frontend Developer to join their developer team. This is a senior individual contributor role focused on building More ❯

We’re currently partnering with a high growth scale up that is building the next wave of cloud technology with AI at the heart of the developer experience. They are expanding their engineering team and looking for a Senior Frontend Engineer who wants more than feature delivery. Someone who loves solving hard problems, shaping architecture and … building products that other engineers love to use. 🧩 What you’ll be getting stuck into • Building polished, high performance UIs for cloud developer workflows • Collaborating closely with backend and platform teams to ship seamless experiences • Shaping scalable frontend architecture and best practices from the ground up • Driving code quality through testing and performance optimisation • Exploring how … GCP • Strong focus on performance, scalability and polished UX • Bonus if you have exposure to Node.js or Golang/Python • Curiosity around AI powered tooling, interfaces or developer experience • Bachelor's Degree within Computer Science or relevant fields If you are looking for a role where you can influence direction, work on ambitious and deeply technical More ❯

software. They are undergoing a major evolution of their platform and are now seeking a talented Frontend Developer to help re-architect the front-end of their flagship product. This is an exciting opportunity to join an exceptionally skilled engineering community and have genuine architectural influence on a modern, high-impact system. … teams across the stack, including those working in C#/.NET on the backend. Key Responsibilities Lead and contribute to the re-architecture and modernisation of the front-end system Develop high-quality, scalable, and responsive UI components using React, TypeScript, and JavaScript Work collaboratively with a highly experienced engineering community Implement best practices for code … or able to commute to the London office on a hybrid schedule Why This Role Is Exciting Opportunity to own and lead the redesign of a core front-end system Work alongside exceptionally skilled engineers with deep domain expertise Join a company experiencing strong growth and technological evolution Modern tech stack and meaningful architectural responsibilities Hybrid More ❯

Are you an experienced Frontend Developer looking for a new challenge and to work for an AI startup with an important mission? 🚀 Senior Frontend Developer – AI Data Security 🚀 Location : Hybrid working 1-3 days a week in central London (King’s Cross) Salary : up to £135,000 + bonus + equity We … exciting time to join the team as they are growing across multiple areas of the business, having just secured over £17mil in funding. As a Senior Frontend Developer, you will: Have 6+ years experience as a Frontend Software Engineer Experience developing with: React, Typescript, HTML, CSS A desire to be part of an important mission Be … illness cover If you enjoy a flexible culture with the ability to work from home a few days a week, apply now for this unmissable Senior Frontend Developer opportunity now! Please note : Due to compliancy reasons, we will only be able to consider applications based in and eligible to work in the UK. More ❯

Frontend Developer - React, NodeJS and TypeScript – Up to £500/day (Outside IR35) – Hybrid (London) – 3 month contract My client is seeking an experienced Frontend Developer to join their team. You will need strong commercial experience in working with React, NodeJS and TypeScript. Essential Skills: Strong commercial experience with React More ❯

EdTech Frontend Developer – Vue/Nuxt (Mid-Level+) I am looking for a Frontend Developer with 2+ years' experience working with modern web technologies to join my clients team who are in the EdTech space! Core Skills: Vue.js & Nuxt 4 (Vite, Composition API, Pinia, Nuxt Plugins) TypeScript/JavaScript (ES6) – clean, maintainable More ❯