51 to 72 of 72 Jest Jobs in the UK

the MERN stack. Experience - Application Developer • Advanced skills in JavaScript (NodeJS ES6) technologies. • Senior development experience using MERN framework for web application development. • Unit with React Testing Library/Jest and E2E test automation with Cypress • Experience in refactoring legacy applications into modern, scalable, and maintainable solutions • Release procedures, coding design and documentation Candidates who are currently an Application Developer More ❯

the MERN stack. Experience - Application Developer • Advanced skills in JavaScript (NodeJS ES6) technologies. • Senior development experience using MERN framework for web application development. • Unit with React Testing Library/Jest and E2E test automation with Cypress • Experience in refactoring legacy applications into modern, scalable, and maintainable solutions • Release procedures, coding design and documentation Candidates who are currently an Application Developer More ❯

micro frontends. Very strong JavaScript/TypeScript and functional programming experience Experience with frameworks such as ReactJS, Yup, React hook forms, Zustand etc. Test/Automated testing knowledge with Jest and Playwright. Knowledge of web security and OAUTH2 authentication. Strong problem-solving and analytical skills. Superb communication and collaboration abilities. Proactive attitude and a passion for learning new technologies. WHAT More ❯

or above for every release. Taking part in daily stand-ups, sprint planning, demos, and retrospectives. Working closely with team members to deliver features iteratively and efficiently. Using Jest and React Testing Library for unit testing. Running end-to-end tests with Cypress or Playwright. Maintaining at least 80% test coverage across projects. Configuring and running GitHub Actions pipelines. Automating … build. VS Code/Visual Studio: Confident in configuring settings, extensions, and launch configs. Accessibility: Knowledge of WCAG 2.1 and ARIA, with audit/test results as evidence. Testing: Jest, React Testing Library, and Cypress/Playwright, including coverage reports. Build tools: Webpack or Vite, npm or Yarn, with a focus on optimised bundles and code-splitting. CI/CD … Version control: Git with feature branch workflows and protected main branches. CI/CD: GitHub Actions for linting, testing, building, and deploying. Package managers: npm and Yarn. Testing frameworks: Jest, React Testing Library, Cypress, and Playwright. Project management: Tiega. Cross-browser testing: Chrome, Edge, Firefox, Safari, and BrowserStack. More ❯

including: Full stack development with C#, .NET 9, JavaScript/React/TypeScript, SQL, AWS Building integrations with third-party systems and delivering data migrations Supporting testing activities (NUnit, Jest, system integration testing) Collaborating with colleagues to deliver new features and long-term product enhancements About You Were keen to speak with developers who: Have commercial experience with C#/ More ❯

APIs, GraphQL, and modern front-end build tools (Webpack, Babel, etc.) Experience with responsive design and cross-browser compatibility Understanding of version control systems (Git) Knowledge of testing frameworks (Jest, Enzyme, or similar) is a plus Experience 2+ years of professional experience in front-end development using React.js Proven track record of delivering high-quality web applications in a collaborative More ❯

and React . Experience with Node.js, Webpack , and modern development workflows. Strong understanding of client-side performance, cross-browser compatibility, and RESTful APIs . Experience with testing frameworks (e.g., Jest, Enzyme ) and UI tools (e.g., Figma ). A passion for building maintainable, scalable, and high-quality software. Strong communication skills and a collaborative mindset. Bonus skills: Data visualisation (e.g., D3.js More ❯

and contribute directly to the user experience. Your Day-to-Day Will Include: Designing and implementing scalable front-end solutions using React , TypeScript , and modern tooling (e.g. Redux, Webpack, Jest). Breaking down complex, ambiguous problems into clean, testable components. Performance tuningboost UI responsiveness, decrease load times, and streamline data management. Selecting and integrating third-party tools and libraries wisely More ❯

systems. Demonstrate deep expertise in React (including advanced patterns, SSR/SSG, Next.js), Node.js, TypeScript, and Azure cloud services. Define and enforce comprehensive testing strategies (unit, integration, E2E) using Jest, Testing Library, Playwright, and champion TDD/BDD practices. Architect and implement scalable, secure APIs (REST, GraphQL), event-driven services (Kafka), and robust error handling. Advanced SQL (PostgreSQL), schema design More ❯

inclusive design principles. Abillity to lead cross-functional teams and mentor developers Experience translating design language into reusable code components. Experience with CI/CD pipelines, testing frameworks (e.g., Jest, Playwright), and performance monitoring Additional Information Benefits package includes: Hybrid working Great compensation package and discretionary bonus Core benefits include pension, bupa healthcare, sharesave scheme and more 25 days annual More ❯

Express applications and REST APIs Strong understanding of JWT-based auth flows and role-based access control Familiarity with SIP protocols, VoIP testing, and telephony systems Experience with Postman, Jest, Cypress, and other automation tools Knowledge of cloud environments (AWS/Azure/GCP) and microservices testing Excellent defect reporting and collaboration skills Why Apply? Work on a life-impacting More ❯

training and personal development. Technical Skills: HTML CSS TypeScript React JavaScript object model JavaScript preprocessors eg webpack, Rollup, Babel SCSS/LESS Knowledge of performance testing frameworks Mocha and Jest The company offers a competitive salary, exposure to new technology, career progression and a great working environment with a talented team. Interviews are being held within the next couple of More ❯

experience Strong commercial experience with React and TypeScript Familiarity with Vite, Next.js, or other modern build tools Comfortable with component libraries and design systems Proficient in testing frameworks (e.g. Jest, React Testing Library) Good understanding of performance optimisation and accessibility best practices The ideal candidate will be proactive, collaborative, and keen to influence both tech and product direction. If you More ❯

App Store and Google Play Store Tech Stack & Tools React Native with TypeScript, React Navigation, Reanimated/Gesture Handler Java/Kotlin & Swift/Objective-C Gradle, GitHub Actions Jest, React Testing Library, Detox (end-to-end) App Attest, Play Integrity API, secure coding best practices If this sounds interesting, please apply for a confidential chat to find out more. More ❯

App Store and Google Play Store Tech Stack & Tools React Native with TypeScript, React Navigation, Reanimated/Gesture Handler Java/Kotlin & Swift/Objective-C Gradle, GitHub Actions Jest, React Testing Library, Detox (end-to-end) App Attest, Play Integrity API, secure coding best practices If this sounds interesting, please apply for a confidential chat to find out more. More ❯

Expert knowledge of HTML, CSS, JavaScript Experience developing Frontend Application using Modern Javascript frameworks like React/Vus/Svelte Writing unit tests Modern front end testing frameworks like Jest Experience of consuming and modifying CI/CD pipelines Experience working with API of varying types and integrating with backend data Experience of working with cloud technologies (Azure/AWS … Expert knowledge of HTML, CSS, JavaScript Experience developing Frontend Application using Modern Javascript frameworks like React/Vus/Svelte Writing unit tests Modern front end testing frameworks like Jest Experience working with API of varying types and integrating with backend data Desirable Experience of Docker Experience of working in a Continuous Delivery or Deployment environment Experience of developing any More ❯

along with a strong understanding of component-based architecture, state management (e.g., Redux, Zustand, or Recoil), and front-end performance optimization. Experience with RESTful APIs, GraphQL, and testing frameworks (Jest, React Testing Library, Cypress) is highly desirable. You should be comfortable mentoring junior engineers, conducting code reviews, and helping the team adopt scalable, maintainable practices. This role offers an exciting … management libraries (Redux, Zustand, Recoil, or similar), and responsive design. Familiarity with RESTful APIs, GraphQL , and integrating frontend applications with backend services. Hands-on experience with frontend testing frameworks (Jest, React Testing Library, Cypress) and ensuring high-quality, maintainable code. Knowledge of performance optimization, accessibility (WCAG), and cross-browser compatibility best practices. Strong collaboration skills, able to mentor junior engineers More ❯

along with a strong understanding of component-based architecture, state management (e.g., Redux, Zustand, or Recoil), and front-end performance optimization. Experience with RESTful APIs, GraphQL, and testing frameworks (Jest, React Testing Library, Cypress) is highly desirable. You should be comfortable mentoring junior engineers, conducting code reviews, and helping the team adopt scalable, maintainable practices. This role offers an exciting … management libraries (Redux, Zustand, Recoil, or similar), and responsive design. Familiarity with RESTful APIs, GraphQL , and integrating frontend applications with backend services. Hands-on experience with frontend testing frameworks (Jest, React Testing Library, Cypress) and ensuring high-quality, maintainable code. Knowledge of performance optimization, accessibility (WCAG), and cross-browser compatibility best practices. Strong collaboration skills, able to mentor junior engineers More ❯

along with a strong understanding of component-based architecture, state management (e.g., Redux, Zustand, or Recoil), and front-end performance optimization. Experience with RESTful APIs, GraphQL, and testing frameworks (Jest, React Testing Library, Cypress) is highly desirable. You should be comfortable mentoring junior engineers, conducting code reviews, and helping the team adopt scalable, maintainable practices. This role offers an exciting … management libraries (Redux, Zustand, Recoil, or similar), and responsive design. Familiarity with RESTful APIs, GraphQL , and integrating frontend applications with backend services. Hands-on experience with frontend testing frameworks (Jest, React Testing Library, Cypress) and ensuring high-quality, maintainable code. Knowledge of performance optimization, accessibility (WCAG), and cross-browser compatibility best practices. Strong collaboration skills, able to mentor junior engineers More ❯

senior level contributions writing in TypeScript React PostgreSQL Bonus points for experience in high velocity and technically challenging roles Our tech stack Frontend: React Typescript GraphQL (Apollo Client) Playwright Jest Storybook + Chromatic Mantine GCP (Cloud Run) Backend: Node Typescript PostgreSQL GraphQL Yoga Jest Auth0 GCP (Cloud Run, Cloud SQL, Cloud Storage + more) All the other good stuff: GitHub More ❯

We re seeking a detail-oriented QA Engineer with strong expertise in test automation using tools like Playwright, Jest, and Cucumber. The ideal candidate has solid programming skills to develop and maintain automated testing frameworks and is proficient in API testing for RESTful and services. Experience in performance testing, database validation using SQL, and ensuring cross-browser and cross-platform … Agile teams, you ll collaborate closely with developers and stakeholders to deliver reliable, high-quality software products. QA Engineer Key Skills & Competencies Test Automation: Hands-on experience with Playwright, Jest, and Cucumber for end-to-end, unit, and behavior-driven testing. Programming & Scripting: Strong programming/scripting skills to build and maintain automated test frameworks. API Testing: Proficient in validating More ❯

We’re seeking a detail-oriented QA Engineer with strong expertise in test automation using tools like Playwright, Jest, and Cucumber. The ideal candidate has solid programming skills to develop and maintain automated testing frameworks and is proficient in API testing for RESTful and services. Experience in performance testing, database validation using SQL, and ensuring cross-browser and cross-platform … Agile teams, you’ll collaborate closely with developers and stakeholders to deliver reliable, high-quality software products. QA Engineer – Key Skills & Competencies Test Automation: Hands-on experience with Playwright, Jest, and Cucumber for end-to-end, unit, and behavior-driven testing. Programming & Scripting: Strong programming/scripting skills to build and maintain automated test frameworks. API Testing: Proficient in validating More ❯