26 to 50 of 78 Senior Front-End Engineer (Client-Side Engineer) Jobs in London

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 ...

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 ...

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 ...

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 ...

United States Digital Space LLC is seeking a Senior Frontend Engineer to solve complex problems and enhance our platform in London. As part of a fast-growing company, your contributions will help disrupt the home cleaning market by building scalable and intuitive ...

Applied Intuition UK is seeking a Senior Fullstack Engineer to join our London team. You will own the design, development, and production rollout of user-facing software across interfaces, APIs, and services. You will work with engineers spanning frontend, backend, and autonomy ...

Immersum is hiring a Senior Frontend Engineer to design and build a modern React single-page application with ownership from first commit to production. You’ll impact onboarding, accounts and KYC/KYB flows in a fast, autonomous fintech engineering culture. ...

CreateFuture in the UK is looking for a Senior Frontend Engineer (Vue.js/TypeScript) to build scalable, accessible frontend solutions for iGaming clients. You’ll influence technical direction, mentor peers, and help embed AI and automation in delivery. This role supports hybrid ...

Intermedia, a leading cloud communications company, invites a Senior Frontend Engineer to shape real-time conversations and embedded experiences across our web channels. You will influence frontend architecture and drive scalable patterns from design to production. You will collaborate with Product ...

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 ...

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 ...

Saturn, a Series A fintech, is hiring a Senior Product Engineer to own adviser-facing work across web and mobile, shaping AI-assisted workflows and the underlying frontend platform. You will collaborate with product leaders, designers, and experts to move ambiguous problems ...

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 ...

Emma is looking for a Senior Frontend Engineer to shape the mobile and web experience from our London office. You will drive features end-to-end using React and React Native, partnering across product ...

Motilent Ltd seeks a Senior Software Engineer for their Platform Frontend Team, responsible for key components in an advanced medical imaging platform. The role requires hands-on development and technical leadership, including mentoring and architectural direction. Candidates should have a strong background ...

Emma is seeking a Senior Frontend Engineer (React/React Native) to join our London office. You will own frontend features for mobile and web apps, contribute to architecture, and collaborate with a high-performance team to ship delightful user experiences. ...

full-fledged programs, such as common operating pictures, alert-triaging inboxes, and resource allocation planning tools driven by rich-ML models. As a Senior Front End Software Engineer focused on application development in Foundry ...

Synthesia Limited, a London-based AI video platform, is hiring a Senior Frontend Engineer for the Website team. You will own the component library, content model and rendering stack behind synthesia.io, shaping direction and making key technical decisions. You’ll work end ...

full‐fledged programs, such as common operating pictures, alert‐triaging inboxes, and resource allocation planning tools driven by rich‐ML models. As a Senior Front End Software Engineer focused on application development in Foundry ...

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/ ...

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 … clean code, automation, and continuous improvement.* Excellent interpersonal skills and a passion for developer experience and security.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 ...

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 … clean code, automation, and continuous improvement. Excellent interpersonal skills and a passion for developer experience and security. 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 ...

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/ ...