Frontend Developer Jobs in Wales, United Kingdom

The In-Play team at bet365 builds the flagship Sports product, delivering real-time betting, Live Streaming, and Match Live features to over 120 million customers. As a Frontend Software Developer, you will write sharp, scalable React/TypeScript code, design low-latency and highly available front-end solutions, and support product owners and testing teams across the full delivery cycle.

The Digital Engineering team at ITG builds enterprise-grade digital applications for high-profile brands. As a Lead Frontend Developer on a 3-6 month contract, you will build and maintain responsive web products and SPAs (finance calculators, configurators, ecommerce) using React, TypeScript, and modern tooling.

The Digital Engineering team at ITG builds enterprise-grade digital applications for high-profile brands. As a Lead Frontend Developer, you will build and maintain responsive web products (SPAs, finance calculators, configurators, ecommerce apps) using React, TypeScript, and modern tooling.

Mindrift's Tendem project connects specialists with innovative technology projects to help develop high-quality AI technologies. As a Freelance Frontend Developer, you will design, build, and refine landing pages, waitlist pages, promo pages, and small multi-page websites, turning client briefs into responsive, performant, conversion-focused web experiences.

Mindrift is seeking a Freelance Frontend Developer for the Tendem project to build high-quality landing pages and multi-page websites for real-world use cases. You will design, build, and refine conversion-focused web experiences using HTML/CSS/JavaScript and React/Next.js, turning client briefs into responsive, performant sites.

Wind Turbine Monitoring Team builds a next‑generation SaaS platform that uses AI to analyze sensor data from thousands of turbines. As a Frontend Engineer you will design and implement intuitive, data‑dense interfaces in Elm for expert users investigating turbine behavior, turning complex operational data into clear workflows.

HASH's Engineering team builds web-based tools that turn complex data into intuitive, AI‑driven interfaces. As a senior Frontend Engineer you will design and ship React/TypeScript components for world‑modeling and AI native UI, set code quality standards, and collaborate with UX researchers and AI engineers.

Join GitLab's Repository Management team to build secure, performant frontend features using Vue.js and GraphQL. You will develop guardrails for AI agents managing code repositories while maintaining high reliability through performance tuning and observability.

Security & IT – IT team is building a modern SaaS platform for mission‑critical business operations. The Senior Frontend Engineer will design, develop and deliver responsive, pixel‑perfect user interfaces using React, TypeScript and Material UI, own features from design handoff through testing and deployment, and mentor peers while leveraging AI‑assisted development tools.

HASH Engineering team builds an open-source platform that integrates structured and unstructured data into knowledge graphs for simulation, optimization, and automation. As a Senior Frontend Engineer you will design, build, and ship React/TypeScript components for complex, AI‑native interfaces, set architecture standards, and mentor peers.

Security & IT – IT team builds a highly technical SaaS platform to simplify and automate complex infrastructure workflows. As a Frontend Engineer you will design, develop and maintain modern React, TypeScript and GraphQL features, collaborate with product managers, UX/UI designers and backend engineers, and own features from discovery through deployment.

Stacklet Platform team builds an award‑winning governance‑as‑code solution that helps organizations optimize cloud cost, security, and compliance. As a Senior Frontend Engineer you will design and implement performant, well‑tested user interfaces that translate complex cloud governance data into intuitive experiences.

Swanky, a Shopify Platinum Partner, builds and optimises Shopify Plus stores across the UK and Europe. The role focuses on hands‑on frontend development: creating, testing and deploying custom themes, writing Liquid templates, and building responsive, accessible, high‑performance storefronts.

Senior Staff Software Engineer – FrontEnd at Matillion leads architectural vision for React-powered platform, owns Design System and micro-frontend strategy, champions agentic development with AI tools, aligns frontend roadmap with Maia AI platform, coaches squads, drives performance and security, and influences product strategy in a hybrid Manchester office.

Soda is building the first Data & AI performance monitoring platform to help Fortune 500 companies solve data quality bottlenecks. As a Senior Full-Stack Engineer, you will lead frontend development for complex, data-dense UIs while owning backend API implementations in Java.

Mondelēz International seeks a Developer for Packaging Development & Engineering to lead packaging design and deployment for its global biscuit and chocolate brands. Based in Birmingham, UK, this hybrid role involves executing RDQ activities, managing supplier trials, and creating technical specifications to enhance consumer experience.

Development Planning team at WSP delivers transport planning, civil infrastructure and urban design for development and master‑planning projects. The Technical Director leads client‑facing activities, drives business growth, shapes market strategy and provides technical leadership across multidisciplinary bids.

Cannonball Recruiting, a U.S.-based recruiting firm serving construction, manufacturing, industrial, and skilled trades sectors, seeks a Sales Development Representative to drive new client opportunities. The role focuses on outbound cold calling, LinkedIn outreach, CRM management, and crafting sales sequences to book qualified meetings with U.S. business owners and hiring managers.

Threat Intelligence engineering team at NCC Group builds, deploys, secures, monitors, and maintains application extensions, automations, and tooling for its cyber threat intelligence platforms. The Developer creates Python and Bash CLI tools, connects backend systems, and supports analysts and engineers with robust automation solutions.

Threat Intelligence engineering team at NCC Group builds, deploys, secures, monitors and maintains application extensions, automations and tooling for its cyber threat intelligence platforms. The Developer creates Python and Bash CLI tools, connects backend systems, and supports analysts and engineers with robust automation solutions.