19 of 19 Jest Jobs in Central London

Node.js and cloud-based infrastructure Ability to build dynamic dashboards and complex interactive UIs Familiarity with preprocessors (Sass, LESS) and build tools (Webpack, Gulp) Experience with testing frameworks like Jest or Mocha Strong skills in optimizing front-end performance Success Metrics Deliver high-quality, responsive UI components that elevate the overall user experience Maintain a clean, efficient, and high-performing More ❯

and web technologies Strong with backend TypeScript, e.g. Node JS, Nest JS and Express. Commitment to maintaining high quality software through the use of automated testing tools such as Jest and Cypress/Playwright Experience with Azure DevOps is a plus. Agile, Git and version control A pragmatic, right-tool-for-the-job mentality You must have a Computer Science More ❯

of functional components, React Hooks, and component lifecycle - Skilled in TypeScript and writing type-safe frontend code - Proficient in Tailwind CSS, CSS Modules, or styled-components - Bonus: Next.js, GraphQL, Jest, React Testing Library, Cypress - Experience deploying via Netlify, or CI/CD pipelines - Comfortable with Git, ESLint, Prettier, and automated workflows Please apply for immediate interview! CBSbutler is operating and More ❯

design Experience with Git-based workflows and tools like Azure DevOps Bonus Points For Exposure to Azure cloud services (App Services, Functions, etc.) Familiarity with unit testing tools like Jest or NUnit Understanding of CI/CD pipelines and DevOps processes Awareness of accessibility and user-centered design principles Interest in mentoring junior devs or helping others grow What We More ❯

design Experience with Git-based workflows and tools like Azure DevOps Bonus Points For Exposure to Azure cloud services (App Services, Functions, etc.) Familiarity with unit testing tools like Jest or NUnit Understanding of CI/CD pipelines and DevOps processes Awareness of accessibility and user-centered design principles Interest in mentoring junior devs or helping others grow What We More ❯

HTML5, React 16/17+, Typescript4/5+, JavaScript UI Libraries such as Material UI or Ant Design. CSS pre-processors such as SASS and LESS Testing frameworks e.g. Jest Performance profiling and optimisation Build tools such as Webpack Code quality and governance tools such as Sonarqube. Responsive design and cross-browser compatibility Version control systems such as git i.e. More ❯

and JavaScript Node.js React Docker and containerized development workflows Git and version control NoSQL databases - MongoDB and Redis AWS services - EC2, Lambda, S3, and CloudWatch RESTful APIs Testing frameworks - Jest , Mocha , or similar CI/CD pipelines Start up background Salary They offer a base salary of £50,000 and £60,000 + Equity. Location This client has an office More ❯

principal role. Technical Proficiency: Expertise in React.js and its core principles, including state management (e.g., Redux, Context API), hooks, and lifecycle methods. Testing: Proficiency in testing frameworks such as Jest, React Testing Library, and end-to-end testing tools. Build Tools: Familiarity with modern build pipelines and tools. Version Control: Experience with Git and collaborative workflows. Soft Skills: Excellent communication … and Node.js internals. Demonstrable hands-on experience using modern front-end build tools and bundlers (Webpack, Rollup, Vite). Comprehensive experience with modern testing tools and frameworks, such as Jest, Vitest, React Testing Library, Playwright, or Cypress, including writing robust unit, integration, and end-to-end tests, as well as establishing best practices for test coverage and continuous integration pipelines. More ❯

React.js and TypeScript. Collaborate with designers to transform wireframes and prototypes into functional, responsive interfaces using Tailwind CSS for styling. Write automated tests using tools such as Cypress or Jest to ensure functionality and prevent regressions. Contribute to the continuous improvement of team workflows and coding standards. Experience Required Proven experience with web applications. Knowledge of integrating and consuming RESTful More ❯

mobile libraries for networking. Experience with performance and memory tuning tools. Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model. Experience with automated testing suites, like Jest or Mocha. Excellent problem-solving skills and the ability to think algorithmically. Experience with cloud message APIs and usage of push notifications. Knowledge of CI/CD pipelines, code signing More ❯

re Looking For Frontend Expertise: Strong skills in HTML, CSS, TypeScript, React JS, and familiarity with libraries like react-query and Material-UI. Testing Know-How: Experience with Playwright, Jest, and React Testing Library. UX-Focused: A sharp eye for design and a passion for creating seamless user experiences. Team Player: Excellent communication and collaboration skills-essential for thriving in More ❯

complex problems). Excellent attention to detail. An ability to explain technical concepts to non-technical audiences. Preferred Skills : NextJS (app router, static rendering, turbo, mono-repo, Vercel) Typescript Jest Storybook (and Storybook testing) Playwright Contentful Algolia Datadog (or similar monitoring tools) GitHub actions Akamai GraphQL Benefits: 33 days annual leave for full time employees (25 days holiday + More ❯

attention to detail. An ability to explain technical concepts to non-technical audiences. Preferred Skills : NextJS/Vercel (app router, caching, speed-insights, static rendering, turbo, mono-repo) Typescript Jest Storybook (and Storybook testing) Playwright Contentful (or similar headless CMSs) Algolia Datadog (or similar monitoring tools, structuring logs, setting up monitors) GitHub actions HTTP (headers, status codes, payloads) Akamai GraphQL More ❯

delivery Deep knowledge of feature flagging, analytics, and A/B testing frameworks for experimentation and insights Experience in unit testing, integration testing, and end-to-end automation using Jest, Playwright, or equivalent Comfortable in agile, fast-paced environments with shifting priorities More ❯

high-speed, agile environment A proactive mindset and the ability to lead when needed ⚙️ Tools You’ll Be Using: Python, React, Next.js, TypeScript, AWS, Docker, Sentry, GraphQL, PostgreSQL, Redis, Jest, PyTest, Tailwind 💡 Why You’ll Love It: 💷 Up to £80,000 salary package 🏡 Hybrid remote – flexible working with London office base 🔄 Real ownership – your work will directly impact users and More ❯

Frontend Engineer (GreenTech) - Typescript, React.js, Tailwind CSS, RESTful API's, Testing - Cypress/Jest, Complex Design & Architecture, Problem Solving! We're hiring for a GreenTech scale up who have recently secured huge PE funding and are looking for a Frontend Engineer who's owned the delivery of complex internal and customer facing frontends! You'll have the opportunity to own More ❯

design patterns for mobile development like MVC frameworks. Experience with any of the following would be advantageous – Redux, RESTful APIs, MSSQL & relational databases, GitHub, automated test suites like Mocha, Jest, etc. You will have a good understanding of the Scrum delivery framework, blended with a pragmatic approach to delivering in resource and time constrained environments. You’ll know your way More ❯

Senior React Native Developer opportunity. Interviews are taking place shortly! Keywords: Senior React Native Developer, Mobile App Development, UI/UX, iOS, Android, Redux, RESTful APIs, GitHub, MSSQL, Mocha, Jest, Clean Code, Agile, FinTech, Hybrid Working, London, App Store, Google Play, Mobile App Launch Established in Didsbury, Connexa Technology Ltd is becoming one of the UK's fastest growing IT More ❯

Strong knowledge of web accessibility standards and experience using screen readers for a solid understanding of their behaviour ( JAWS , NVDA OR VoiceOver ). Testing experience with tools such as Jest , React Testing Library , Playwright , or Cypress. Familiarity with CI/CD , version control (Git), and semantic versioning. Experience documenting components using Storybook or similar tools and eventually training other developers More ❯