126 to 136 of 136 Jest Jobs in the UK

Front End Developer

Location
Greater London, England, United Kingdom
designs and requirements into high-quality interfaces. Develop reusable components using modern UI component libraries. Write and maintain unit tests using tools such as Jest or Jasmine. Work within Agile development teams and contribute to sprint planning, refinement and delivery. Ensure applications meet WCAG accessibility standards. Use Git for version … TypeScript/JavaScript (ES6+). HTML5 and CSS3, including responsive design. REST API integration. State management experience, ideally Redux or NgRx. Unit testing with Jest, Jasmine or equivalent. Git. Strong understanding of WCAG and accessible web development. Experience with modern UI/component libraries. Experience working within Agile development teams. ...

Senior Software Developer

Location
Otley, England, United Kingdom
Job title: Senior Software Developer Department: Technology Team: Software Reporting to: VP, Clinical & Academic Technologies People Manager? No Location: Hybrid (ideally based in our Bottisham office for 2-3 days per week) Contract: Permanent Working ...

Frontend Javascript Developer

Hiring Organisation
Quant Capital
Location
London, UK
Employment Type
Full-time
only product ideas but also technology and data manipulation. TypeScript/React/Redux/Styled Components/Apollo GraphQL/Webpack/Jest/Cypress/PrettierWe are growing our UI team to develop new features for our exciting frontend product built in React, as well as maintaining existing … about. Follow me on Twitter for more roles and news @SebFintechTypeScript/React/Redux/Styled Components/Apollo GraphQL/Webpack/Jest/Cypress/Prettier ...

Senior Quality Engineer (mobile)

Location
Greater London, England, United Kingdom
Define and evolve a pragmatic test pyramid for React Native - deciding where E2E is worth the weight and where logic belongs in faster layers (Jest, React Testing Library, component tests). Make deliberate calls about coverage, reliability, and speed trade-offs across the app. Set the bar for what "ready … testing experience, with a point of view on test data and environment strategy. OUR TECH STACK Mobile: TypeScript, React Native, Expo, EAS, GraphQL, Relay, Jest, React Testing Library, Maestro. Backend: Kotlin, PHP 8 (Symfony), AWS, Postgres, RabbitMQ, Docker, Kubernetes. Tooling and observability: GitHub, GitHub Actions, Jira, Confluence, Datadog, Sentry, Grafana. ...

React Developer

Location
Greater London, England, United Kingdom
Company Overview: Team Creation Limited is a fast-growing software development company operating across Asia and Europe. We provide services including market research, artificial intelligence solutions, cloud computing, and mobile application development for a broad ...

Senior Front-End Developer

Location
Greater London, England, United Kingdom
campaigns on a daily basis. Our Tech Stack includes TypeScript, Node.js, React/Vue/Svelte, Vite, esbuild, Babel, pnpm/npm, GitHub Actions, Jest/Vitest, Playwright/Cypress, NestJS/Express, REST/GraphQL (check details from Stack Share Profile ) Responsibilities: Develop scalable, maintainable web applications regardless … higher – must be comfortable with technical communication, documentation, and client interactions Nice To Have: Monorepo setups (Nx, Turborepo), Storybook, Playwright/Cypress, Vitest/Jest Performance monitoring (Lighthouse, Web Vitals) and logging/observability Security best practices (CSP, SRI, OWASP, dependency auditing) CDN, edge functions, SSR/SSG, ISR architectures ...

Senior Software Engineer – Platform Frontend Team

Location
Greater London, England, United Kingdom
authentication, and reporting/persistence APIs; guide configuration and deployment best practices across environments. Uphold engineering standards — code style and quality gates, localisation requirements, Jest unit coverage, Typedoc documentation, and CI‐ready builds via Webpack/Docker. Provide technical leadership: mentor engineers through reviews, pairing, and architectural collaboration, while investing … knowledge of DICOM/DICOMWeb workflows, imaging metadata, multi-series coordination, and medical data privacy considerations. Tooling fluency: Webpack 5, npm scripts, Dockerised deployments, Jest testing, ESLint/Prettier automation, and scalable state management patterns. Secure OAuth/OpenID (Keycloak) implementations, robust API integration, resilient error handling, and localisation pipelines. ...

Senior webontwikkelaar

Location
United Kingdom
Salaris : £65.000 (afhankelijk van ervaring) Locatie : Hybride – 1 dag per week op kantoor in Eastleigh, 4 dagen op afstand. Sponsoring is op dit moment niet beschikbaar voor deze functie. Sluit je aan bij een gevestigde ...

Frontend Engineer (Ko/Terminal)

Location
Greater London, England, United Kingdom
team can build on. Build and improve high-performance, low-latency interfaces that hold up under real, live market data. Write well-tested code (Jest, Cypress, or Playwright) and contribute to how the team reviews and documents its work. Split your time between shipping new features and keeping things healthy … professional frontend development experience, with excellent TypeScript, React, and Next.js. Experience with MUI or a similar component library. Solid testing practice with frameworks like Jest and Cypress or Playwright. Proficient with Git, Docker, and CI/CD workflows, and familiar with monorepo structures and tools (Turborepo, Yarn Workspaces, or similar ...

Mobile App Developer 3

Location
Grimsby, England, United Kingdom
Putting the ‘i’ into British Innovation. Putting the ‘i’ into Inventing the Future. Putting the ‘i’ into Inspiring Change. myenergi is a growing global clean‐tech manufacturer dedicated to removing the barriers to a greener ...

Real-Time React UI Architect - Low-Latency

Location
City Of London, England, United Kingdom
HCLTech is seeking a UI Developer with expert React, TypeScript and low-latency focus to build time-critical, high-availability web applications. You will contribute across the full UI development lifecycle, from design through testing ...