26 to 36 of 36 Front-End Developer (Client-Side Developer) Jobs in the City of London

Frontend Engineer – React and Typescript – Hybrid 1-2 days onsite – 6-month initial contract We’re looking for a Front-End Engineer to join the DAX Ad Platform team, helping to build scalable, modular user interfaces within a modern React-based environment. You’ll play a key role in migrating features from a legacy platform to … performance, consistency, and maintainability across the product. What You’ll Do Contribute to the migration of legacy features into the new micro-frontend platform Build and maintain front-end features using a React + TypeScript stack Utilise and extend an internal component library to ensure consistency and scalability Implement complex form handling and validation using Formik … and Yup Integrate with GraphQL APIs via Apollo Client, and occasionally consume REST endpoints Manage client-side state efficiently and ensure smooth data flows Collaborate cross-functionally with designers, product managers, and engineers to deliver cohesive and accessible UI experiences Write unit tests and contribute to automated testing strategies using Vite and React Testing More ❯

Must Skills: 1. Front-End Development: Build and maintain responsive, accessible web applications using React, JavaScript. 2. Accessibility Compliance: Ensure all components meet WCAG standards through accessibility testing and evaluation. 3. Tool Proficiency: Utilize tools such as GitHub, JIRA, Figma, Visual Studio Code, and CMS platforms like Magnolia and WordPress. 4. Component Design: Create reusable, scalable More ❯

Must Skills: 1. Front-End Development: Build and maintain responsive, accessible web applications using React, JavaScript. 2. Accessibility Compliance: Ensure all components meet WCAG standards through accessibility testing and evaluation. 3. Tool Proficiency: Utilize tools such as GitHub, JIRA, Figma, Visual Studio Code, and CMS platforms like Magnolia and WordPress. 4. Component Design: Create reusable, scalable More ❯

I'm currently looking for a Senior React Developer to join a London Based Trading company as they continue to scale and grow their development team. This company has been growing substantially over the last 2 years and are expanding again with exciting projects lined up in their trading technology teams. The company are based in … plans for =expansion over the next 2 years within the renewables and Algo trading space. They have set career progression plans, with routes to Tech Lead, Principal Developer and Engineering Manger and offer one of the best total comp packages in London. This is an in office position in central London, with some flexibility to More ❯

I'm currently looking for a Senior React Developer to join a London Based Trading company as they continue to scale and grow their development team. This company has been growing substantially over the last 2 years and are expanding again with exciting projects lined up in their trading technology teams. The company are based in … plans for =expansion over the next 2 years within the renewables and Algo trading space. They have set career progression plans, with routes to Tech Lead, Principal Developer and Engineering Manger and offer one of the best total comp packages in London. This is an in office position in central London, with some flexibility to 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 ❯

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 ❯

Full Stack Developer – Contract – Hybrid – £600-£700/pd Inside IR35 – 6 months I’m working with a consultancy who are looking to hire a Full Stack Developer (SC Cleared) on a contract basis for an initial 6-month assignment. The role is hybrid with flexibility on location. Skills required: React-heavy …/experience Strong full stack development and problem-solving skills Active SC Clearance This role has a short interview process with immediate start dates available. Full Stack Developer – Contract – Hybrid – £600-£700/pd Inside IR35 – 6 months More ❯

Full Stack Developer – Contract – Hybrid – £600-£700/pd Inside IR35 – 6 months I’m working with a consultancy who are looking to hire a Full Stack Developer (SC Cleared) on a contract basis for an initial 6-month assignment. The role is hybrid with flexibility on location. Skills required: React-heavy …/experience Strong full stack development and problem-solving skills Active SC Clearance This role has a short interview process with immediate start dates available. Full Stack Developer – Contract – Hybrid – £600-£700/pd Inside IR35 – 6 months More ❯

Senior Frontend (React/Vue) Developer - Contract - Airline Transformation A global airline is urgently seeking Frontend developers … to support a large-scale transformation aimed at modernising their IT Suite across all business layers. Your primary responsibility will be to accelerate the migration of their front-end from Vue to React in applications that support their crew operations. You will work closely with the product lead, who is tasked with leading the adoption of … Rate: 700 Inside Location: Heathrow Airport, London Hybrid: Flexible Duration: 3months Requirements: Extensive experience building comprehensive UI using React and Vue (6years +) Deep understanding of modern front-end development best practices and architecture Experience with component-based architecture and design systems Experience working with diverse stakeholders such as; third-party partners, executive stakeholders, and clients More ❯

Senior Frontend (React/Vue) Developer - Contract - Airline Transformation A global airline is urgently seeking Frontend developers … to support a large-scale transformation aimed at modernising their IT Suite across all business layers. Your primary responsibility will be to accelerate the migration of their front-end from Vue to React in applications that support their crew operations. You will work closely with the product lead, who is tasked with leading the adoption of … Rate: 700 Inside Location: Heathrow Airport, London Hybrid: Flexible Duration: 3months Requirements: Extensive experience building comprehensive UI using React and Vue (6years +) Deep understanding of modern front-end development best practices and architecture Experience with component-based architecture and design systems Experience working with diverse stakeholders such as; third-party partners, executive stakeholders, and clients More ❯