26 to 50 of 81 Permanent Senior Front-End Engineer (Client-Side Engineer) Jobs

About us Encord is the universal data layer for AI that helps 300+ AI teams train and run models on the right data. Our platform indexes, curates, annotates, and evaluates data across the full AI ...

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 ...

shared 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 growing … 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 BenefitsIf this sounds like you then we'd love to hear from you, tell us what ...

Frontend Engineer to join the Technology department in London. You will own front-end components and complex forms in a React 18/TypeScript environment, focusing on onboarding clients and accounts with KYC/ ...

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 As an equal opportunity employer, we do not discriminate on the basis of any protected ...

them, it’s deeply embedded within our DNA. Invest in us and we’ll invest in you!Job DescriptionAs a Front-End Developer, you'll collaborate closely with Product Owners, Business Analysts, Technical Architects, UX/UI Designers and other team members … digital products. Your role involves ensuring that the code aligns with these requirements and adheres to our architectural and front-end coding standards. Performance optimisation is key, and you'll employ best practices to enhance our applications. Additionally, you'll stay proactive ...

foster them, its deeply embedded within our DNA. Invest in us and well invest in you! Job Description As a Front-End Developer, you'll collaborate closely with Product Owners, Business Analysts, Technical Architects, UX/UI Designers and other team members … digital products. Your role involves ensuring that the code aligns with these requirements and adheres to our architectural and front-end coding standards. Performance optimisation is key, and you'll employ best practices to enhance our applications. Additionally, you'll stay proactive ...

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 ...

JPMorgan Chase & Co. in London is seeking a Software Engineer III to join the Enterprise Observability Platforms, delivering trusted technology products securely and at scale. You will design, develop, and troubleshoot across multiple domains, leveraging enterprise AI coding assist tools while maintaining code quality ...

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 ...

Reactive Markets Limited is seeking a senior frontend engineer to build the trading platform across the stack, using TypeScript and Rust. You’ll work on trader-facing interfaces and the services behind them, with ownership from design through production. You’ll join … small, senior team focused on high-performance systems, with remote-friendly, UK-based setup and opportunities for mentorship and impact across the platform. #J-18808-Ljbffr ...

Payments in London is seeking a Senior Frontend Engineer to join the Technology team. You will own the design and implementation of a React-based SPA that orchestrates complex forms and onboarding flows for clients and sub-accounts. We expect strong React ...

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 ...

Octopus Energy Group is seeking a Senior Frontend Engineer to join the Flexibility team in London. You will lead frontend work, craft customer journeys for onboarding and control of low carbon tech, and build internal interfaces for stakeholders and prototypes. The role ...

Octopus Energy is seeking a Senior Frontend Engineer to join our Flexibility team. You will own frontend strategy, build advanced customer journeys, and deliver scalable interfaces that power millions of low-carbon decisions. Collaborate with design and product to ship fast ...

Gold Group Limited seeks a Senior Frontend Engineer to advance the core product with a hands‐on role in a small, fast‐moving team. You’ll own features end‐to‐end, shape frontend architecture ...

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 ...

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 ...

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 ...

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 ...

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. ...

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 ...

Payward, the parent company behind Kraken, is seeking an experienced Senior Software Engineer for its Payments & Blockchain team. You will design and build payment processing systems that securely handle digital and fiat transfers, while focusing on fast, reliable user experiences. You will ...

Cognizant in Burgess Hill is seeking a Senior Frontend Engineer to design, develop, and deliver data-driven web applications. You will join a high-performance distributed engineering team and work with product managers and engineers to build scalable, accessible UI solutions that ...