76 to 100 of 134 Permanent Front-End Engineer (Client-Side Engineer) Jobs

on a mission to make AI safe and reliable for everyone. To help us achieve this, we're seeking a Front End Software Engineer to join our team! We're particularly looking for someone with strong front end engineering and Typescript experience and with some experience of backend … office in London (Hammersmith). We're excited to have you contribute to our mission! Responsibilities: As a Safe Intelligence Front End Software Engineer, you will: Make key contributions to software development on our TypeScript-based frontend systems, primarily utilizing React to craft intuitive and highly functional user interfaces. Develop simple and More ❯

on a mission to make AI safe and reliable for everyone. To help us achieve this, we're seeking a Front End Software Engineer to join our team! We're particularly looking for someone with strong front end engineering and Typescript experience and with some experience of backend … office in London (Hammersmith). We're excited to have you contribute to our mission! Responsibilities: As a Safe Intelligence Front End Software Engineer, you will: Make key contributions to software development on our TypeScript-based frontend systems, primarily utilizing React to craft intuitive and highly functional user interfaces. Develop simple and More ❯

on a mission to make AI safe and reliable for everyone. To help us achieve this, we're seeking a Front End Software Engineer to join our team! We're particularly looking for someone with strong front end engineering and Typescript experience and with some experience of backend … office in London (Hammersmith). We're excited to have you contribute to our mission! Responsibilities: As a Safe Intelligence Front End Software Engineer, you will: Make key contributions to software development on our TypeScript-based frontend systems, primarily utilizing React to craft intuitive and highly functional user interfaces. Develop simple and More ❯

on a mission to make AI safe and reliable for everyone. To help us achieve this, we're seeking a Front End Software Engineer to join our team! We're particularly looking for someone with strong front end engineering and Typescript experience and with some experience of backend … office in London (Hammersmith). We're excited to have you contribute to our mission! Responsibilities: As a Safe Intelligence Front End Software Engineer, you will: Make key contributions to software development on our TypeScript-based frontend systems, primarily utilizing React to craft intuitive and highly functional user interfaces. Develop simple and More ❯

on a mission to make AI safe and reliable for everyone. To help us achieve this, we're seeking a Front End Software Engineer to join our team! We're particularly looking for someone with strong front end engineering and Typescript experience and with some experience of backend … office in London (Hammersmith). We're excited to have you contribute to our mission! Responsibilities: As a Safe Intelligence Front End Software Engineer, you will: Make key contributions to software development on our TypeScript-based frontend systems, primarily utilizing React to craft intuitive and highly functional user interfaces. Develop simple and More ❯

DuckDB, WebGPU) · D3/visx · Storybook · Tailwind CSS · Jest · Cypress · Playwright What You Bring 8+ years building and evolving large-scale web applications. Proven track record in front-end architecture (modular codebases, micro-frontends, design systems, scalability). Strong portfolio of data-heavy, real-time UIs and reusable component libraries. Expertise in TypeScript, CSS methodologies (Tailwind … in-JS), and modern testing frameworks. Passion for developer experience, tooling, and mentoring. Degree in Computer Science or equivalent experience. Bonus points for: Open source contributions to front-end tooling, design systems, or data-visualisation libraries. Experience with WebSockets, PWAs, offline support, or design-token pipelines. How They Work Speed with craftsmanship: Continuous delivery, short feedback … Why Apply? This is a chance to join a hyper-growth company at the forefront of AI-powered collaboration, tackling some of the most exciting challenges in front-end engineering today. Interested? Reach out to Stax for a confidential discussion. Please be advised that, owing to the expected volume of applications, we may only be able More ❯

DuckDB, WebGPU) · D3/visx · Storybook · Tailwind CSS · Jest · Cypress · Playwright What You Bring 8+ years building and evolving large-scale web applications. Proven track record in front-end architecture (modular codebases, micro-frontends, design systems, scalability). Strong portfolio of data-heavy, real-time UIs and reusable component libraries. Expertise in TypeScript, CSS methodologies (Tailwind … in-JS), and modern testing frameworks. Passion for developer experience, tooling, and mentoring. Degree in Computer Science or equivalent experience. Bonus points for: Open source contributions to front-end tooling, design systems, or data-visualisation libraries. Experience with WebSockets, PWAs, offline support, or design-token pipelines. How They Work Speed with craftsmanship: Continuous delivery, short feedback … Why Apply? This is a chance to join a hyper-growth company at the forefront of AI-powered collaboration, tackling some of the most exciting challenges in front-end engineering today. Interested? Reach out to Stax for a confidential discussion. Please be advised that, owing to the expected volume of applications, we may only be able More ❯

DuckDB, WebGPU) · D3/visx · Storybook · Tailwind CSS · Jest · Cypress · Playwright What You Bring 8+ years building and evolving large-scale web applications. Proven track record in front-end architecture (modular codebases, micro-frontends, design systems, scalability). Strong portfolio of data-heavy, real-time UIs and reusable component libraries. Expertise in TypeScript, CSS methodologies (Tailwind … in-JS), and modern testing frameworks. Passion for developer experience, tooling, and mentoring. Degree in Computer Science or equivalent experience. Bonus points for: Open source contributions to front-end tooling, design systems, or data-visualisation libraries. Experience with WebSockets, PWAs, offline support, or design-token pipelines. How They Work Speed with craftsmanship: Continuous delivery, short feedback … Why Apply? This is a chance to join a hyper-growth company at the forefront of AI-powered collaboration, tackling some of the most exciting challenges in front-end engineering today. Interested? Reach out to Stax for a confidential discussion. Please be advised that, owing to the expected volume of applications, we may only be able More ❯

DuckDB, WebGPU) · D3/visx · Storybook · Tailwind CSS · Jest · Cypress · Playwright What You Bring 8+ years building and evolving large-scale web applications. Proven track record in front-end architecture (modular codebases, micro-frontends, design systems, scalability). Strong portfolio of data-heavy, real-time UIs and reusable component libraries. Expertise in TypeScript, CSS methodologies (Tailwind … in-JS), and modern testing frameworks. Passion for developer experience, tooling, and mentoring. Degree in Computer Science or equivalent experience. Bonus points for: Open source contributions to front-end tooling, design systems, or data-visualisation libraries. Experience with WebSockets, PWAs, offline support, or design-token pipelines. How They Work Speed with craftsmanship: Continuous delivery, short feedback … Why Apply? This is a chance to join a hyper-growth company at the forefront of AI-powered collaboration, tackling some of the most exciting challenges in front-end engineering today. Interested? Reach out to Stax for a confidential discussion. Please be advised that, owing to the expected volume of applications, we may only be able More ❯

DuckDB, WebGPU) · D3/visx · Storybook · Tailwind CSS · Jest · Cypress · Playwright What You Bring 8+ years building and evolving large-scale web applications. Proven track record in front-end architecture (modular codebases, micro-frontends, design systems, scalability). Strong portfolio of data-heavy, real-time UIs and reusable component libraries. Expertise in TypeScript, CSS methodologies (Tailwind … in-JS), and modern testing frameworks. Passion for developer experience, tooling, and mentoring. Degree in Computer Science or equivalent experience. Bonus points for: Open source contributions to front-end tooling, design systems, or data-visualisation libraries. Experience with WebSockets, PWAs, offline support, or design-token pipelines. How They Work Speed with craftsmanship: Continuous delivery, short feedback … Why Apply? This is a chance to join a hyper-growth company at the forefront of AI-powered collaboration, tackling some of the most exciting challenges in front-end engineering today. Interested? Reach out to Stax for a confidential discussion. Please be advised that, owing to the expected volume of applications, we may only be able More ❯

Senior Frontend Engineer – Next.js/React Location: Monument WeWork in London Type: Full-Time About Admanage.ai We’re building the Cursor for ad management. Admanage.ai helps companies launch ads 10x faster on Meta & TikTok. Created by top performance marketers who’ve managed over $50M+ in ad spend. Our mission? Level the playing field by giving every More ❯

Senior Frontend Engineer – Next.js/React Location: Monument WeWork in London Type: Full-Time About Admanage.ai We’re building the Cursor for ad management. Admanage.ai helps companies launch ads 10x faster on Meta & TikTok. Created by top performance marketers who’ve managed over $50M+ in ad spend. Our mission? Level the playing field by giving every More ❯

Senior Frontend Engineer – Next.js/React Location: Monument WeWork in London Type: Full-Time About Admanage.ai We’re building the Cursor for ad management. Admanage.ai helps companies launch ads 10x faster on Meta & TikTok. Created by top performance marketers who’ve managed over $50M+ in ad spend. Our mission? Level the playing field by giving every More ❯

Senior Frontend Engineer – Next.js/React Location: Monument WeWork in London Type: Full-Time About Admanage.ai We’re building the Cursor for ad management. Admanage.ai helps companies launch ads 10x faster on Meta & TikTok. Created by top performance marketers who’ve managed over $50M+ in ad spend. Our mission? Level the playing field by giving every More ❯

Senior Frontend Engineer – Next.js/React Location: Monument WeWork in London Type: Full-Time About Admanage.ai We’re building the Cursor for ad management. Admanage.ai helps companies launch ads 10x faster on Meta & TikTok. Created by top performance marketers who’ve managed over $50M+ in ad spend. Our mission? Level the playing field by giving every More ❯

engineering. Our products are redefining experiences within the industry, so help us reach our goals while we help you reach yours! We’re seeking a Senior Frontend Engineer to join our UI Engineering team. This team is focused on providing frontend solutions to multiple projects and tooling to the whole company. We are deeply committed to … our Design Systems, and collaborating with backend teams to deliver consistent, reliable, and user-friendly experiences across the platform. What You Will Do As a Senior Frontend Engineer, you will join our globally distributed team to shape and elevate Cint’s Measurement, Survey Platform, and Design System experiences. Your mission is to craft high-quality, scalable … research products delivering intuitive experiences for our customers while also enabling internal teams to move faster with confidence. You will be a product-oriented and platform UI engineer, taking full ownership of the end-to-user experience. This includes partnering closely with UX designers, product managers, and fellow engineers to understand customer and stakeholder More ❯

practices to provide other developers with a reliable foundation. Fluency in English is required, and knowledge of German is an added bonus. Responsibilities: As a Senior Frontend Engineer, you will design, build, and maintain ambitious web applications as part of a cross-functional team located at our European sites. You will participate in designing, building, and More ❯

fixed income system evolution, and ensure strategic tech integration. Enjoy flexible work, ongoing training, and a supportive, inclusive environment. Key Responsibilities: Design and develop modern, high-performance front-end applications using React and TypeScript, ensuring they meet the demanding needs of real-time trading environments. Plan and deliver solutions that align with business goals and support … intricate trading workflows Build resilient and maintainable user interfaces by implementing comprehensive testing strategies and code reviews Ensure that all front-end components are well-architected, scalable, and integrate seamlessly Collaborate effectively with cross-functional teams-including traders, backend engineers, and product managers Contribute actively to the decommissioning of legacy systems by facilitating the adoption of … gather requirements, provide technical guidance, and ensure that delivered solutions address real-world challenges faced by end users. Key Requirements: Demonstrated expertise in developing sophisticated front-end applications using React.js, JavaScript/TypeScript Proven experience building real-time trading or financial applications where high performance and low latency are essential for business success. Comprehensive More ❯

Senior Frontend Engineer | React & TypeScript | Salary £70-80k | Hybrid (Surrey once a fortnight) Would you like to build products that directly impact the daily lives of people across the entire UK I’m working with a long-established Tech4Good organisation (20 years strong) who provide essential digital services to councils nationwide. They’re expanding their … product range and are now looking for a Senior Frontend Engineer to take ownership of frontend development across two new products. You’ll be the React SME within the business - leading on frontend development best practices, mentoring other engineers, and helping to shape the company’s frontend strategy as they grow. You’ll work closely with … design system and lead the development of a new component library that will underpin the next generation of their products.This is a fantastic opportunity for a Senior Engineer who wants to take ownership, influence technical direction, and see the results of their work benefit millions across the UK. What you’ll need Excellent commercial experience with More ❯

cross-functional team that’s responsible for the full software development life cycle, from conception to deployment. At enablis, we’re big proponents of the T-Shape engineer profile, recognising the value of people covering a broader spectrum of skills, this works really well in the … dynamic world of consulting and provides our employees with career experience hard to match anywhere else. As a Full Stack Developer, you should be comfortable around both front-end and back-end coding languages, development frameworks and third-party libraries. We’re also grounded though and recognise that’s for many, that span of … Requirements and skills Proven experience as a Front End/Full Stack Developer or similar role Experience developing modern tech stacks Knowledge of front-end languages and libraries (React or Vue.js) Knowledge of back-end languages (Java, Python, Node, Go, C#) Familiarity with data design, handling and security Excellent communication More ❯

cross-functional team that’s responsible for the full software development life cycle, from conception to deployment. At enablis, we’re big proponents of the T-Shape engineer profile, recognising the value of people covering a broader spectrum of skills, this works really well in the … dynamic world of consulting and provides our employees with career experience hard to match anywhere else. As a Full Stack Developer, you should be comfortable around both front-end and back-end coding languages, development frameworks and third-party libraries. We’re also grounded though and recognise that’s for many, that span of … Requirements and skills Proven experience as a Front End/Full Stack Developer or similar role Experience developing modern tech stacks Knowledge of front-end languages and libraries (React or Vue.js) Knowledge of back-end languages (Java, Python, Node, Go, C#) Familiarity with data design, handling and security Excellent communication More ❯

Front End Engineer/Developer (React v19 TypeScript) London/WFH to £95k Are you a Front End technologist looking for an opportunity to progress your career in a hands-on role with lots of learning opportunities? You could be joining a Hedge Fund with complex work and … substantial bonus earning potential. As a Front End Engineer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. … are degree educated, having achieved a 2.1 or above in Computer Science or similar technical discipline What's in it for you: As a Front End Engineer you will receive a competitive package: Salary to £95k Bonus Pension Self development and career progression opportunities Apply now to find out more about this More ❯

This is a full-time remote role for a Frontend Engineer at LifeShack. The Frontend Engineer will be responsible for implementing application pages, owning new features end-to-end and optimizing UX to boost conversion rates and customer retention. Are you ready to apply Make sure you understand More ❯

Senior Product Engineer (Frontend) 3 days a week in Central London Salary paying £90k-£115k + benefits Oliver Bernard have partnered with a high-growth, product-led tech company on the search for a Senior Product Engineer (Frontend) to take ownership of a core product area and help shape the technical and … are valuable and impactful. End-to-end ownership of projects in a lean, collaborative environment. Please apply now for more information. Senior Product Engineer (Frontend More ❯

Senior Product Engineer (Frontend) 3 days a week in Central London Salary paying £90k-£115k + benefits Oliver Bernard have partnered with a high-growth, product-led tech company on the search for a Senior Product Engineer (Frontend) to take ownership of a core product area and help shape the technical and … are valuable and impactful. End-to-end ownership of projects in a lean, collaborative environment. Please apply now for more information. Senior Product Engineer (Frontend More ❯