1 to 25 of 64 Permanent Front-End Developer (Client-Side Developer) Jobs in London

sector? We're expanding our team of DV Cleared technologists to help design and deliver next-generation solutions that keep our nation secure. The Opportunity As a Front-End Developer, you'll play a key role in building intuitive, high-performance user interfaces for secure government and defence systems. You'll collaborate … unique requirements of Defence environments. This is a hands-on technical role for someone who's passionate about modern web development, user experience, and crafting elegant, reliable front-end solutions. Key Responsibilities Develop high-quality, responsive, and accessible web applications using HTML, CSS, and JavaScript . Build interactive, user-focused front ends using modern … to translate wireframes and prototypes into production-ready code. Optimise applications for performance, scalability, and cross-browser compatibility. Work with back-end teams to integrate front-end functionality with APIs and data sources. Conduct testing, debugging, and peer code reviews to ensure clean, maintainable code. Stay current with front-end More ❯

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 ❯

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 ❯

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 ❯

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 ❯

If you need support in completing the application or if you require a different format of this document, please get in touch with at UKI.recruitment@tcs.com with the subject line: “Application Support Request”. Role: Front End More ❯

If you need support in completing the application or if you require a different format of this document, please get in touch with at UKI.recruitment@tcs.com with the subject line: “Application Support Request”. Role: Front End More ❯

Senior Frontend Engineer – Scaling Start-Up – Up to £130,000 + Equity 🚀 💰Up to £130,000 plus equity 🏡Hybrid working – London based 💻React.js & TypeScript We’re partnered with a scaling Start-Up who have recently raised significant investment and are More ❯

Senior Frontend Engineer – Scaling Start-Up – Up to £130,000 + Equity 🚀 💰Up to £130,000 plus equity 🏡Hybrid working – London based 💻React.js & TypeScript We’re partnered with a scaling Start-Up who have recently raised significant investment and are 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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

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 £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 ❯

Frontend Developer 3 months contract 3 days per week in London, 2 days remote. We are seeking a talented and driven Frontend Developer to join our dynamic team and contribute to the development of cutting-edge web applications. You will be instrumental in building rich, interactive user interfaces using modern technologies, with … strong understanding of TypeScript and the ability to work within a distributed technology stack, with exposure to SQL. Required Skills and Experience Proven experience as a Frontend Developer, with a strong portfolio showcasing React and TypeScript projects. Solid understanding of GraphQL and its implementation in frontend applications. Excellent proficiency in JavaScript (ES6+), HTML5, and CSS3. Experience More ❯

Frontend Developer 3 months contract 3 days per week in London, 2 days remote. We are seeking a talented and driven Frontend Developer to join our dynamic team and contribute to the development of cutting-edge web applications. You will be instrumental in building rich, interactive user interfaces using modern technologies, with … strong understanding of TypeScript and the ability to work within a distributed technology stack, with exposure to SQL. Required Skills and Experience Proven experience as a Frontend Developer, with a strong portfolio showcasing React and TypeScript projects. Solid understanding of GraphQL and its implementation in frontend applications. Excellent proficiency in JavaScript (ES6+), HTML5, and CSS3. Experience 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 ❯

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 ❯

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 ❯

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 ❯

Senior Front-End Engineer – Investment Banking |£750 p/d (Outside IR35) | London/Hybrid (1 Day/Week in Office) We are partnering with a global investment bank to hire a Senior Front-End Engineer to join a flagship team delivering a next-generation, single-page application (SPA) platform for high … on a SPA used across the investment bank for derivatives trading. Build elegant, high-performance UIs with real-time data updates and functional programming paradigms. Shape a front-end architecture trusted by traders, with a focus on resilience, performance, and usability . Leverage the latest web technologies in a fast-paced, agile development environment. Flexible working More ❯