26 to 50 of 122 Senior Front-End Engineer (Client-Side Engineer) Jobs in the UK

Hastings Direct is looking for a Senior Digital Engineer to lead and deliver high-quality software solutions. Based in Leicester/Bexhill with a hybrid working model, you'll oversee the software development lifecycle, provide technical leadership, and mentor … junior developers. Ideal candidates will have strong JavaScript and React JS expertise, with experience in UI/UX, debugging, and front-end technologies. Join us to innovate in a dynamic insurance environment that values creativity and continuous improvement. #J-18808-Ljbffr ...

Kleiner Perkins, GV, and Evantic Capital, alongside the founders and operators of Stripe, Datadog, Miro, and Webflow. About the role As a Senior Frontend Engineer on our Website team, you'll be a co-owner of the platform behind synthesia.io: the component … looking for At least five (5) years as a software engineer, including three (3) at senior level, building front end for content-driven or marketing platforms. Real ownership of a content model in Sanity. ...

market. Location: London Office/Hybrid (3 days a week working from home) Reporting to: Engineering Manager The role As a Senior Software Engineer I, you will own the delivery ofhigh-quality software and products, able to be deployedfrequentlyand safely into production. ...

transforming how they can interact with markets tomorrow. For more information, visit https://the company.io. The Role As a Senior Software Engineer on Clear Street's Payments team, you'll play a key role in scaling and modernising our rapidly … customers a smooth payment experience, helping to shape the future of the Clear Street financial ecosystem. What You'll Do Engineer highly reliable, API-driven payment systems that streamline operations and support our global expansion. Translate product and design requirements into clean, maintainable ...

Senior Frontend Engineer (React/React Native) Office: London About the company Emma is the app to manage all things money. Our mission is to empower millions of people to live a better and more fulfilling financial life. Emma was founded … mobile apps Bonus: You previously work for a fintech app Our process: Take-home assessment Screening with internal recruiter Technical call with Senior member of the team Recruiter sync Onsite interview with CTO & CEO Our Benefits: Vitality Membership Health care Dental care Reduced gym memberships Cashback benefits & discounts ...

looking for a Senior Frontend Engineer to join our core team. You will be responsible for building scalable, highly-interactive web applications using React, Next.js, and TypeScript. Requirements 5+ years of experience with React and modern web technologies Deep understanding of Next.js ...

JPMorganChase in London is seeking a Software Engineer III to join the Enterprise Observability Platforms team. You will design and deliver scalable, secure software solutions as part of an agile team, shaping critical technology used across the firm. You will work with React/ ...

James Chase is seeking a Senior Software Engineer to join a growing engineering team building and evolving a major consumer-facing web platform. You’ll work hands-on with React, Next.js and TypeScript, shaping architecture and engineering standards while delivering scalable, high ...

LexisNexis Risk Solutions is seeking a Senior Software Engineer I (JavaScript) to join a cross‐functional team in London. You will build modern web applications using React and Node.js, shaping AI-assisted development workflows to speed delivery while maintaining quality and performance. ...

centers and other energy-intensive industries. Responsibilities Build and maintain responsive, performant web applications using React, TypeScript, Next.js, and modern front-end practices Collaborate with backend engineers to implement APIs and ensure smooth data integration Work closely with product and design teams ...

Amaanc is looking for a Senior Frontend Engineer to join their core team in Birmingham, UK. You will build scalable, highly-interactive web applications using React, Next.js, and TypeScript. Candidates should have 5+ years of experience with modern web technologies, a deep ...

Clear Street is seeking a Senior Software Engineer for its Payments team to scale and modernise our global payments infrastructure, building reliable API-driven systems that integrate with banks and gateways and support expansion into new lines of business. You will collaborate ...

Synapri are working with an exciting Software business operating within the Investment Management space looking to hire an experiencedSenior Front-End Engineerto join their growing team on a permanent basis. This is a hands-on role for someone who enjoys getting stuck … opportunity to solve interesting technical challenges. There’s also significant scope to take on additional responsibility — from helping shape our front-end roadmap and improving processes through to mentoring junior developers and providing technical insight across the wider business. Location: Onsite/ ...

Attest is seeking a Senior Software Engineer to join the Measure squad and help evolve our quantitative survey platform. You will work across frontend and backend, building scalable features and shaping direction while mentoring teammates. The role emphasizes AI-native development, real ...

Citi is seeking a motivated Front-end Web Developer to join Citi Tech in Belfast. You will build, test, and maintain web applications using React on the frontend and Java on the backend, collaborating with experienced developers to grow your software engineering ...

consulting firm is seeking a front-end developer for their Issuemaster real-time web application in Greater London. The ideal candidate will have at least 4 years of experience with Angular, 3 years with Typescript, and expertise in real-time web application ...

Quantum in Maidstone is seeking a Senior Frontend Engineer to own the frontend across our Cashback and Custard apps and websites. You will ship new functionality that moves revenue, while strengthening the release pipeline with automated testing and elevating the user experience … rewards products. You should be a strong frontend engineer with React and TypeScript, experience shipping mobile apps (ideally React Native), and comfortable collaborating across the stack with Python services #J-18808-Ljbffr ...

Gamingtec in London is seeking a Senior Frontend Developer (React & React Native) to lead frontend engineering across web and mobile platforms. You will own UI quality, collaborate with product and back-end … teams, and ship robust SPA/PWA experiences with modern tooling. You should have 7+ years as a Front-End Engineer, mastery of React 18+ with TS, Redux/MobX/Zustand, REST/GraphQL ...

goal: to drive the global green energy revolution. Read our Spotlight series to meet some of the team. We are looking for a Senior Frontend Engineer to join our Flexibility team. The Flexibility team was established in early 2026, and has been … recorded a podcast about our culture and how we empower our people. We’ve also been placed in the top 10 companies for senior leadership Visit our UK perks hub - Octopus Employee Benefits Are you ready for a career with us? We want to ensure you have ...

Dayshape, Edinburgh-based, is seeking a senior software engineer to join the engineering team. You will enhance frontend features, ensure scalable and accessible UI, and work closely with product and QA to deliver value. You’ll own features end ...

Group is seeking a Senior Frontend Engineer specialising in 3D graphics, digital twins and geospatial visualisation. The role focuses on building high-performance 3D digital twin applications and interactive mapping platforms with real-time data and AI-driven analytics. You will work ...

Segmentify is seeking a highly experienced frontend engineer to transform requirements into scalable technical solutions. You will collaborate with product, design, and customer success to deliver reliable deployments used … hundreds of Segmentify customers daily. The role covers developing across React, Vue, or Svelte, building npm packages, and shaping Front-End CI/CD pipelines. A strong TS background and B2+ years of experience in BFF patterns are valued. #J-18808-Ljbffr ...

Adapty is hiring a Senior Frontend Engineer to own the frontend of Flow Builder, shaping its architecture and guiding features from customer problems to production. You will collaborate with the SDK team, ensure fast editor performance, and drive the product forward with ...

Citi is seeking a motivated Front-end Web Developer to join our development team in Belfast. You will work with React on the frontend and Java on the backend to build, test, and maintain web applications. This role offers a collaborative environment ...

Parser is seeking a Senior Frontend Engineer to craft scalable, accessible web apps using React.js and modern frontend practices. You will translate designs into high-quality interfaces, optimize performance, and integrate with backend APIs in a cross-functional team across Europe ...