26 to 50 of 80 Senior Front-End Engineer (Client-Side Engineer) Jobs

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 ...

Nando's UK & Ireland is seeking a Senior Software Engineer for the Web Experience team. You will own the online ordering web experience, work with React and Next.js, and help steer the product direction while mentoring engineers across the team. ...

Applied Data Science Partners Ltd. seeks a Senior UX Engineer to bridge design and frontend development, delivering accessible, high-performance experiences. You will lead prototyping, champion design systems, and mentor teammates in UI engineering best practices. Responsibilities include translating designs into production ...

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 ...

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 ...

Burns Sheehan is collaborating with a rapidly scaling AI-native SaaS business to recruit a Senior Product Engineer (Frontend) in the UK. The role combines hands-on frontend work with architectural responsibilities, and sits in a remote-first, UK-focused setup with ...

passionate, pragmatic Frontend/Web Software Engineer with an inquisitive mind who is motivated to make change for the better and most importantly put our customer first. You’ll enjoy working as part of a team and be a keen problem solver. Comfortable with ...

About the roleYou’ll be a passionate, pragmatic Frontend/Web Software Engineer with an inquisitive mind who is motivated to make change for the better and most importantly put our customer first. You’ll enjoy working as part of a team ...

Intermedia Intelligent Communications is seeking a Senior Frontend Engineer to lead the development of scalable, real-time web experiences. You will design and implement high-quality components, collaborate with product and UX teams, and drive frontend architecture decisions across channels. You will ...

Talent in the United Kingdom is seeking a Senior Front End Developer (iGaming) to build and maintain the user interface for our platform. You will work closely with product and design teams to deliver responsive, high-performance web experiences. ...

Octopus Energy Group is seeking a Senior Frontend Engineer to join the Flexibility team. You will lead frontend capability, set technical direction, and build a range of customer-facing journeys that empower users with low carbon tech management. You will collaborate with ...

Unitary is a remote-first AI startup building Virtual Agents. As a Senior Software Engineer, you will own the frontend for our products and help shape how customers see and trust AI-powered work, turning early builds into polished surfaces. You will ...

JPMorganChase is seeking a Front-end Software Engineer III to help build the Wholesale Credit Risk Core Platform. You will design and deliver secure, scalable frontend solutions using Javascript, Typescript, and React, interfacing with a Spring ...

A renewable energy startup located in London is seeking a skilled Web Developer to create and maintain responsive applications using modern technologies like React and TypeScript. The ideal candidate should have over 5 years of ...

Unitary is a remote-first AI startup building Virtual Agents for midmarket customers. We seek a senior React engineer to own frontend interfaces, reimagine our frontend into a scalable platform, and blend product thinking with engineering excellence. You will collaborate with product ...

Mimica is a fully remote-first AI-powered process intelligence platform. We are seeking an experienced Senior Frontend Engineer to join the Mapper Team, building data-visualisation apps and real-time interfaces for executing complex processes. You will own features end ...

Our mission at BOLDSCIENCE is to disrupt the Medical Communication and Healthcare Advertising industry by offering the most complete suite of industry leading scientific, creative, and digital expertise under one roof. Our vision is to ...

Encord is building the universal data layer for AI, powering 300+ teams with data curation, annotation, and evaluation across the AI lifecycle. We are seeking engineers who enjoy tough frontend work, rendering large 3D/ ...

MintNeuro in London seeks a Senior Digital Design Engineer to own front-end digital design and verification for next-generation mixed-signal ASICs used in implantable neural interfaces. You will write clean Verilog/ ...

WOLF Qanawat is seeking a Senior Frontend Web Engineer to lead development of a web application and migrate from Polymer to React/TypeScript. The role is hybrid with minimum 2 days in the Cramlington/Newcastle area, offering a salary ...

innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers. Role Profile We are seeking a Senior Frontend Developer to join our Customers Identity & Access Management team at LSEG. You will play a pivotal role in maintaining and evolving our JavaScript ...