22 of 22 Front-End Engineer (Client-Side Engineer) Jobs in the City of London

Front-End Engineer – AI Infrastructure Global Web3 startup London - Hybrid working £140k - £150k + equity DATAHEAD has been exclusively retained by a global deep-tech startup pioneering the future of developer tooling through AI infrastructure. This early-stage company is creating a … Ivy League institutions, they’re entering their next phase of growth and scaling their engineering team. The Opportunity: As their first dedicated Front-End Engineer , you’ll lead the development of high-performance, user-centric interfaces for their AI-driven products. Working … ll help define and implement end-to-end UI/UX strategy and set architectural standards for scalable front-end systems. What You’ll Do: Drive front-end development and architecture for new AI products. Define UI/ More ❯

Senior Front-End Engineer – DeFi/Web3 Startup Location: Hybrid (2–3 days/week in London) Salary: Up to £150,000 + Equity Type: Full-Time, Permanent Join one of the most exciting early-stage Web3 startups on the market. As … the first Senior Front-End Engineer, you will" Architect and build slick, scalable front-ends for AI-driven tools Define UI/UX standards and lead the frontend tech stack Own key components, libraries and interfaces across the platform Collaborate More ❯

A brilliant opportunity for a Front-End Software Developer to join an incredibly exciting start-up in London, which is currently in stealth mode developing exciting technology in the security space. Joining a company founded by experts in their field, who have already realised success with … 45k for Graduate Level, £55k - £60k for 2 years etc) Requirements for Software Developer Ideally, you will have least 1 year of front-end development experience but an exceptional graduate considered (i.e. 1st class degree from a top uni with A*A*A at A Level … JavaScript, Vue, Node, Yarn, Kotlin, Swift Strong problem-solving ability Natural ability to quickly pick up and learn new technologies Responsibilities for Front-End Software Developer Design and refine user interfaces that are responsive, inclusive, efficient, and scalable. Enhance frontend systems, development tools, and workflows on More ❯

Elite electronic quantitative finance fintech business seek a Front End React/TypeScript software expert to join their growing team. Our client is a top end and leading global trading/investment More ❯

Calling new graduates! Or people with 1-2 year’s experience (maximum). Fast growing company revolutionising the Hedge Fund industry are seeking a Front End Developer/Software Engineer. This is a great place to More ❯

Lead & Principal Frontend Focussed Fullstack Product Engineers (React/TypeScript) - £80 -140K + Equity + Benefits Hybrid (3 days/week in London) The Opportunity We're looking for Lead and Principal engineers to help shape the future of More ❯

Location : Hybrid (remote-friendly, with team days at our Paddington HQ in London) About us Moon Intelligence is a founder-led, successful startup delivering innovative solutions to the sports betting industry since 2018. The business is built around predictive sports More ❯

or expected to have background in Machine Learning. This is a senior-level role, and we are looking to hire a software engineer with background in product design, UI/UX design, and with a strong sense of aesthetics. We would love to see your recent … and wider ecosystem. Why join us? Work in an environment conducting cutting-edge research in AI. An official role title of “Founding Engineer” – make an impact on day one. Competitive salary, equity and benefits package. 28 days + public holidays allowance. Opportunities for professional growth and More ❯

user flows; however, you are not required or expected to have background in Machine Learning. We are looking to hire a software engineer with with a strong sense of aesthetics. We would love to see your recent frontend works! If possible, please include the link(s … and wider ecosystem. Why join us? Work in an environment conducting cutting-edge research in AI. An official role title of “Founding Engineer” – make an impact on day one. Competitive salary, equity and benefits package. 28 days + public holidays allowance. Opportunities for professional growth and More ❯

user flows; however, you are not required or expected to have background in Machine Learning. We are looking to hire a software engineer with background in UI/UX design, and with a strong sense of aesthetics. We would love to see your recent frontend works … and wider ecosystem. Why join us? Work in an environment conducting cutting-edge research in AI. An official role title of “Founding Engineer” – make an impact on day one. Competitive salary, equity and benefits package. 28 days + public holidays allowance. Opportunities for professional growth and More ❯

Help Us Redefine the Future of Healthcare Frontend Software Engineer (React JS) '? Remote (UK-based) | '? Up to £80,000 Are you ready to use your frontend skills to make a real-world impact? Join a mission-driven team that's transforming clinical research through cutting-edge More ❯

backend services, with a thorough understanding of asynchronous programming patterns, event-loop mechanics, and Node.js internals. Demonstrable hands-on experience using modern front-end build tools and bundlers (Webpack, Rollup, Vite). Comprehensive experience with modern testing tools and frameworks, such as Jest, Vitest, React Testing More ❯

are working in partnership with a growing FinTech partner in the UK and we are are looking for a Senior Frontend React Engineer to join them on a contractual basis. The role: You’ll be working closely with product managers, designers and engineers across teams to … UX). Responsibilities Work on critical frontend applications used by a global network of sellers Develop greenfield products and enhance our existing front-end architecture Collaborate closely and pair with product designers Provide engineering advice for team issues, and be involved in wider technical decisions that … gradual, frequent iterations Experience required Have strong technical skills with: React, TypeScript, CSS, React Testing Library/Vitest, Playwright. Implemented performant, responsive front-end applications in agile Product teams. Have substantial experience working closely with product designers during discovery and implementation phases of projects. Have a More ❯

Role : Senior Full Stack Engineer (FE or BE focussed) Salary range : 90-170k (+equity) Location : x3 days pw onsite in Central London (Mon/Wed/Fri) Tech stack includes : React, Typescript, Tailwind, Python & Postgres. Current team size: x6 engineers Senior Full Stack Engineer More ❯

Frontend-Leaning Full-Stack Engineer – AI x LegalTech | £150,000 + Equity | 5 Days/Week in Central London One of Europe’s fastest-growing AI startups is building next-gen tools that are redefining how legal professionals work with complex information. They’re hiring a … frontend-leaning full-stack engineer to help craft novel UX for AI-powered workflows, a space where no design playbook exists yet. 💰 What’s on offer: Up to £150,000 salary + equity Generous relocation support Greenfield AI product work with real-world user impact 🔍 What More ❯

A leading company in the Renewable Energy space are on the hunt for a Senior Frontend Engineer to join their highly skilled engineering team! You'll come into the business to join their engineering function and help to spearhead the engineering of their frontend. They work More ❯

Lead Frontend Engineer – AI startup Salary £100,000 - £150,000 London Onsite (relocation fee of £10,000 paid on acceptance) + Equity I'm looking to speak to Lead/Senior level Frontend engineers looking to join a well funded AI native start-up as they … a $1bn valuation. Founded by some of the brightest minds in their AI niche, they're looking for an energetic, passionate founding engineer to help them ship product fast and continue their growth trajectory. Ideally you'll have a background in an AI start-up working … ownership over the frontend, get your ideas implemented and really run with it. This role would fit a Lead or Senior level Engineer with a real passion for AI and startups. Someone who isn’t afraid to own the architecture and implement things as they see More ❯

Frontend Engineer/Inside IR35/Fully remote/6 Month Contract I'm on the lookout for a JavaScript Engineer to join an exciting team who are looking to scale. Role Requirements: JavaScript React.js Test driven development Agile Development experience Ability … object-oriented development. If you are interested in this role, please apply or email your latest CV to (url removed) ASAP! Frontend Engineer/Inside IR35/Fully remote/6 Month Contract More ❯

Junior Frontend Engineer | React & TypeScript | Hybrid (London) An early-stage startup in the AI and compliance space is looking for a Junior Frontend Engineer to help build their very first user-facing product from the ground up. They’re on a mission More ❯

Lead Front End Engineer | Next.js & React.js | Social Media/Scale-Up/20 Million Users | Up to £90,000 | 2 Days Per Week London Company We’re looking for a Lead Front End Engineer … Engineer to take care of all things across the front end. Lead Front End Engineer | Next.js & React.js | Social Media/Scale-Up/20 Million Users | Up to £90,000 | 2 Days Per Week London … spirit Remuneration: Up to £90,000 + Benefits Hybrid Working If you are keen to hear more about Lead Front End Engineer | Next.js & React.js | Social Media/Scale-Up/20 Million Users | Up to £90,000 | 2 Days Per Week London More ❯

Lead Front End Engineer | Next.js & React.js | Social Media/Scale-Up/20 Million Users | Up to £90,000 | 2 Days Per Week London Company We’re looking for a Lead Front End Engineer … Engineer to take care of all things across the front end. Lead Front End Engineer | Next.js & React.js | Social Media/Scale-Up/20 Million Users | Up to £90,000 | 2 Days Per Week London … spirit Remuneration: Up to £90,000 + Benefits Hybrid Working If you are keen to hear more about Lead Front End Engineer | Next.js & React.js | Social Media/Scale-Up/20 Million Users | Up to £90,000 | 2 Days Per Week London More ❯

Founding Product Designer/Frontend Engineer | B2B UX Expert | Stealth AI Start-up London – Onsite | Equity Included A stealth-stage, AI-native start-up — backed by Creandum (investors in Spotify, Klarna, Neo4j, Depop) — is rethinking how businesses interact with complex data and AI workflows. With early … increasing demand, and a fast-growing team, they’re now looking for someone who lives at the intersection of UX design and front-end development to help define the face of the product. This team is building an LLM-leveraged solution designed for high-value B2B More ❯