26 to 44 of 44 Front-End Developer (Client-Side Developer) Jobs in the City of London

Senior Frontend Developer – TypeScript, React 2-3 days p/week in London Up to £90k Would you like the opportunity to join an early-stage start-up who are looking to revolutionise the logistics space? They recently closed a round of funding and are now seeking a Senior Frontend Developer, who … s confident working with React and TypeScript. As a Senior Frontend Developer, you will be responsible for taking their product to the next level. You will be directly responsible for developing and maintaining their frontend application, while working closely with the Head of Engineering. Previous start-up experience would be a bonus; however, they can be … and working in a small team. Happy to consider any profile with 3+ years’ experience Degree background would be a bonus If you’re a Senior Frontend Developer looking to have an impact in an early-stage start-up, please apply. More ❯

to excel in a dynamic, high-energy environment. Join our team and help shape the future of Vision AI. 🌎 Location and Legalities This full-time Frontend Web Developer position is based onsite in our brand-new Ultralytics office in London, UK. Applicants must have legal authorization to work in the UK, as Ultralytics does not provide … visa sponsorship. 🚀 What You'll Do As a Frontend Web Developer at Ultralytics, you will be a key architect of the Ultralytics HUB, our flagship platform for building and deploying AI models. You will create intuitive, high-performance user interfaces that make cutting-edge computer vision accessible to everyone. Key responsibilities include: Designing, developing, and maintaining More ❯

Frontend Engineer (GreenTech) - Typescript, React.js, Tailwind CSS, RESTful API's, Testing - Cypress/Jest, Complex Design & Architecture, Problem Solving! We're hiring for a GreenTech scale up who have recently secured huge PE funding and are looking for a Frontend More ❯

Senior Front-End Engineer Full-time · Remote-first (with occasional London office time) £80,000–£100,000 I'm looking for a Senior Front-End Engineer to take the lead on frontend development at a growing, product-led company within the EdTech space. This is a hands-on, high-ownership role where More ❯

Job Title: React Developer Location: London Salary: Up to £130,000 About the Role: Our client, a prestigious London-based trading firm, is looking to hire a talented E-Trading UI Developer. This is an exciting opportunity to work in a dynamic, fast-paced environment, contributing to the development of advanced electronic trading platforms. More ❯

Frontend Developer (React) Salary: £40,000-£50,000 Location: 2-3 days p/week in London Frontend Developer (React) - would you like the opportunity to work for an organisation currently on a mission to make home buying and selling simpler? You’ll be joining their in-house product and platform team … where you’ll work alongside and learn from highly experienced software developers and product managers. As a Frontend Developer (React), you will get a lot of responsibility and work in an award-winning team, getting the opportunity to work on a wide variety of projects and tasks. Requirements: At Least 1-year commercial experience building web … based applications. Experience in Frontend development (HTML, CSS, JavaScript, React). If you’re a Frontend Developer (React) who enjoys working on a variety of projects and tasks, please apply. More ❯

Frontend Vue.js Developer – Fixed Income Trading | Data Visualisation We are currently recruiting for a Frontend Vue.js Developer to join the Fixed Income Trading Group at a leading asset manager. This is an exciting opportunity to be part of a multi-year greenfield program, contributing to the design and development of a state More ❯

Front-End Developer (one day a week in the central London office) Sports Analytics This role is a unique opportunity for a Front-End Developer to combine technical challenges with creativity in a collaborative, high-standard work environment. By joining this team, you’ll … an ideal setting for those passionate about leveraging cutting-edge technology to make meaningful contributions in the world of sports analytics. Key responsibilities for the role of Front-End Developer include: Build responsive, accessible, and high-performance front-end interfaces using Next.js, React.js, and Tailwind CSS. Collaborate with … and scalability, with an emphasis on cloud integration. Contribute to CI/CD processes, deployments, and frontend build pipelines in a cloud-based environment. As the selected Front-End Developer, your background will include: 3+ years industry experience in a Front-End Developer role More ❯

Frontend Developer – £650/day – 6 months – Inside IR35 – 3 days onsite (London) React or Svelte – Commodities Trading – AWS – TypeScript You'll be working for a leading energy trading business, building out a modern post-trade platform that's genuinely pushing boundaries – live PnL, intraday position reporting, and digitised front office workflows. This is More ❯

Frontend Engineer | AI x Defence | London (Hybrid) | Up to £110k + Meaningful Equity Shape the Interface to the Future of Autonomous Defence Join one of the UK’s most ambitious AI-defence startups, backed by top-tier investors and moving More ❯

Frontend Software Engineer – React/React Native | EdTech Startup Join one of the UK’s most exciting early-stage EdTech startups as their 2nd engineering hire . This is a rare opportunity to get in early, help shape the technical More ❯

Greenfield projects, autonomy, and a blank canvas for you to implement the ideas that motivate you. Does this sound like you, or what you’re missing right now? This role sits within the internal tooling team at a globally renowned More ❯

We have an exciting opportunity for a Front End Developer to join a cracking Creative Agency, to play a pivotal role in bringing their vision to life - working five days a week at their London office! You will be involved throughout the entire project lifecycle; starting with rapid prototypes but ultimately building … amazing production-ready code. Working closely with the other members of the Digital Team and wider studio, the Front End Developer’s role will involve: Monitoring designs and identifying gaps for feasibility. Informing experience design through a technical eye. Managing and producing work to the highest technical standard. Essential skills: Proven in More ❯

Software Engineer – Next.JS Salary up to £80000 - plus bonus Next.JS, Serverside Rendering and Static Rendering, JavaScript, AGGrid, JavaScript. Harrington Starr has partnered with an innovative Digital Investment & Crypto Currency house that specialise in developing unique software systems for Crypto Trading More ❯

Lead Frontend Developer (Vue) Contract: Up to £110k Location: 2-3 days p/week in London Lead Frontend Developer - would you like the opportunity to work for a FinTech organisation that helps its consumers improve their financial well-being. You should be a competent Lead Frontend Developer who enjoys working with Vue, although they are happy to consider other Frontend frameworks. As a Lead Frontend Developer, you will get a lot of responsibility and work on super interesting projects, while working alongside engineers who are passionate and embrace working in fast-paced environments. This FinTech organisation prides itself in … . Hands-on experience delivering production apps with Vue and Angular. Proven experience building enterprise Saas UIs. Knowledge of state management. If you’re a Lead Frontend Developer, please apply. More ❯

world-class technologists and domain experts to deliver scalable, high-performance UIs that support real-time trading and analytics. Key Responsibilities Design and develop responsive, low-latency front-end trading systems using React. Build dashboards and visualisation tools for Fixed Income market data and trade execution. Collaborate with traders, quants, and back-end engineers … to deliver seamless UI experiences. Contribute to architectural decisions and front-end performance tuning. Required Skills & Experience Expertise in React.js and modern JavaScript (ES6+) Proven experience delivering front-end applications in electronic trading environments Strong understanding of performance optimisation and low-latency UI design Experience with real-time data technologies (WebSockets, FIX … etc.) Familiarity with containerized front-end platforms such as OpenFin is a plus Prior exposure to Fixed Income products (Rates, Credit, Bonds) or other capital markets Experience in data visualisation, charting and grid tools like AG Grid, Highcharts etc Ability to thrive in fast-paced, front-office environments with direct business interaction Passionate about More ❯

Front End Developer | Contract | SolidJS | Remote | Outside IR35 | £400-£500 per day Position: Contract Front End Developer Location: Remote IR35: Outside Rate: £400-£500 per day Part time/Short term I'm currently recruiting for a contract frontend developer with an expertise in SolidJS, to join my client for an exciting project! You will be working alongside their CTO (full-stack developer) and their UX UI design specialist to translate high-fidelity designs into live dashboards using SolidJS, with rigorous testing using Playwright and Vitest. They are looking for someone … up to date CV. You must highlight you experience with SolidJS. I'll give you a call if you look like a good fit! Front End Developer | Contract | SolidJS | Remote | Outside IR35 | £400-£500 per day More ❯

Front-end Developer- Start-Up Venture Looking for a frontend-focused software developer to join a stealth-mode start-up with a team that has a history of several multi-million-dollar exits. They've worked together at ventures for the last 15 years. This is a highly More ❯

Microsoft, and Google, we're becoming the go-to AI education platform for all major exams worldwide. The Role We're looking for a talented full-stack developer with a passion for exceptional mobile experiences and interaction design. You'll craft beautiful, engaging user experiences that rival the best consumer apps, while helping us pioneer the … Office Presence : Able to commute 4 out of 5 days a week to our office in Kings Cross, with Wednesday being work from home Ideal Candidate Design-Developer Hybrid : Someone who thinks like both a developer and an interaction designer Game/Gamification Background : Experience in gamified applications where engagement and user More ❯