10 of 10 Front-End Engineer (Client-Side Engineer) Jobs in the Thames Valley

We’re partnering exclusively with one of the most prestigious trading firms in London to find a highly skilled Front-End Software Engineer to join their world-class engineering team. This is an opportunity to work at the very heart of high-performance trading technology — building ultra-responsive, visually intuitive web interfaces … Doing: Building high-performance, data-intensive UIs using React and TypeScript Collaborating closely with back-end engineers, traders, and product teams Designing and refining complex front-end architectures for real-time data visualization Working in a culture where engineering excellence and code quality are non-negotiable 🛠️ Tech Stack: Languages: TypeScript, JavaScript (ES6+) Frameworks: React … WebSockets, performance profiling, or custom charting libraries (e.g., D3.js, Highcharts) ✅ What They’re Looking For: Strong experience with React and modern JavaScript/TypeScript Deep understanding of front-end architecture, performance tuning, and scalable component design Experience in fast-paced environments (finance, trading, gaming, or top-tier tech) Passion for clean, maintainable code and UI craftsmanship More ❯

however, you are not required or expected to have background in Machine Learning. This is a senior-level role, and we are looking to hire a software engineer with background in product design, UI/UX design, and with a strong sense of aesthetics. Portfolio We would love to see your recent frontend works! If possible … with a startup work environment and wider ecosystem. Why join us? Work in an environment conducting cutting-edge research in AI. An official role title of “Founding Engineer” – make an impact on day one. Competitive salary, equity and benefits package. 28 days + public holidays allowance. Opportunities for professional growth and progression with your career. Work More ❯

About the Job Senior Frontend Engineer – London (Victoria) | Hybrid £80k - £110k Are you ready to craft the next generation of data-driven digital experiences for one of Europe’s most technically advanced SaaS innovators? Our client, a pioneer in B2B SaaS solutions , is building “Your Shipping Analytics Supercomputer” , providing cutting-edge data visualisation and … technical role that blends creativity, collaboration, and engineering excellence, ideal for someone who thrives in fast-paced, high-growth environments. What You’ll Bring 5+ years of front-end development experience building large-scale web applications. Expertise in React, TypeScript/JavaScript, HTML, and CSS . A strong appreciation for UI/UX design and a … a £100m AI start-up exit , they’re focusing all their attention on this next big venture. This is an outstanding opportunity to design and deliver the front-end of a platform that’s redefining how businesses interact with data. If you’re a passionate engineer who loves solving complex problems through More ❯

vision. Our mission is to bring the intelligence of modern machine learning directly to the in-store shopping experience. Role: We’re looking for an experienced Frontend Engineer to work closely with product, design, mobile, and machine learning team members to design & build experiences that re-define retail shopping. You'll help help build engaging & intuitive 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 ❯

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 ❯

(Front End) with strong software experience and ambition to grow and develop their career. Responsibilities: Architect and implement scalable front-end solutions, contributing to overall system design and collaborating with cross-functional teams to ensure seamless integration within a complex, enterprise-grade platform. Develop clean, efficient, and maintainable … code using JavaScript and modern front-end frameworks (e.g., React), while leveraging broader language experience (Java, Python) to support full-stack collaboration. Collaborate with cloud infrastructure teams (AWS, Azure, or GCP) to support performance optimization, environment configuration, and scalable feature delivery in cloud-native applications. Establish and maintain CI/CD practices (e.g., GitHub Actions, Jenkins … contributing to the automation of testing, builds, and deployments across development environments. Lead and mentor front-end engineers, providing architectural guidance, driving framework adoption, and promoting front-end best practices across the engineering organization. Experience: Minimum 5 years’ experience working as a software developer in a commercial environment. Strong python programming experience. More ❯

UCL, Innovate UK, Microsoft, and Google, we're becoming the go-to AI education platform for all major exams worldwide. The Role We're seeking a talented Front-End Developer who will help us craft beautiful, engaging user experiences that rival the best consumer apps, while helping us pioneer the future of AI-powered education interfaces. More ❯

Founding Frontend Engineer (React/TypeScript) We’re building the operating system for experience-led businesses — helping teams manage bookings, resources, customers, and payments in one place. Our mission: make it effortless for operators to run what they love. We’re product-led, customer-obsessed , and move fast — small, high-trust, and ambitious. London-based | Hybrid More ❯

Role: Staff Front End Engineer Location: Hybrid - 2-3 days in London Office Compensation: Up to £170,000 + equity We’re working with a frontier AI-driven biology lab on a mission to redefine how science is done. Their research and engineering teams are building next-generation tools that help scientists … visualise, understand, and design biology at an unprecedented scale. As a Front End Engineer , you’ll craft the visual layer of this transformation, designing interfaces that turn vast, complex biological data into intuitive, beautiful experiences. Your work will sit at the intersection of AI, design, and discovery , directly accelerating breakthroughs in life More ❯