76 to 100 of 178 Jest Jobs in the UK

bottlenecks, app profiling. APIs & Data Handling: RESTful APIs, state management (Redux, Zustand, Recoil), offline storage, real-time data (WebSockets, Firebase, SignalR). Testing & Quality Assurance: Unit and integration testing (Jest, React Testing Library), UI testing (Detox/Appium), automated testing pipelines. Deployment & DevOps: CI/CD pipelines, App Store & Google Play deployment, OTA updates, crash reporting tools. What Success Looks More ❯

in a strongly-typed object oriented language such as C# or Java Typescript NestJS GraphQL Elasticsearch React hooks React Native Styled Components Testing react apps using testing-library and jest Testing .Net using NUnit, XUnit and utilising Moq Docker and kubernetes AWS and terraform Experience running high-availability distributed systems What we offer you: Generous annual leave policies aimed at More ❯

automation, CI & deployment tooling such as Git & Actions 2-4 years experience with frameworks and languages: React, Typescript, State Management (Zustand/Redux) You are already Unit Testing with Jest or React-Testing-LIbrary You are aware of the impact of performance & accessibility and understand techniques for improving load and render times. You will have as much passion in HOW More ❯

prerequisite, experience in the following areas would be advantageous: Good software engineering principles (e.g., version control/Git, issue tracking, documentation) Node.js Front-end development tools and libraries like Jest and Rollup Experience with connected devices Web/UX design appreciation (Figma) Salary £80,000 - 80,000 per year More ❯

would be advantageous but is not a prerequisite Good software engineering principles eg Version control/Git, issue tracking, documentation etc Node.js Front end development tools and libraries like jest, rollup etc Experience with connected devices Web/UX design appreciation Figma or similar Full stack software development If you are seeking a role of this nature, please get in More ❯

would be advantageous but is not a prerequisite Good software engineering principles eg Version control/Git, issue tracking, documentation etc Node.js Front end development tools and libraries like jest, rollup etc Experience with connected devices Web/UX design appreciation Figma or similar Full stack software development If you are seeking a role of this nature, please get in 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 ❯

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 ❯

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 ❯

in the following would be advantageous: Latest versions of .NET AI, Machine Learning JavaScript, TypeScript and associated frameworks Containers, Docker, Kubernetes NoSQL Test tools such as xUnit, Cypress, Selenium, Jest, SoapUI This is an exciting opportunity to join a rapidly expanding company using the latest tools and technologies. If you are looking for a role of this nature, please contact More ❯

in the following would be advantageous: Latest versions of .NET AI, Machine Learning JavaScript, TypeScript and associated frameworks Containers, Docker, Kubernetes NoSQL Test tools such as xUnit, Cypress, Selenium, Jest, SoapUI This is an exciting opportunity to join a rapidly expanding company using the latest tools and technologies. If you are looking for a role of this nature, please contact More ❯

experiences. Excellent communication skills and a collaborative mindset. Experience mentoring or guiding junior developers (formally or informally). Bonus Points For: Knowledge of TypeScript Familiarity with testing frameworks (e.g., Jest, React Testing Library) Experience with performance optimization and accessibility If this role sounds of interest, click 'apply now' and a member of our team will be in touch. More ❯

in HTML, CSS, TypeScript, and React JS. Familiarity with cloud platforms like Azure and data retrieval libraries such as react-query. Testing Savvy: Experience with testing frameworks like Playwright, Jest, and React Testing Library. Design and Usability: Working knowledge of Material-UI library and a keen eye for UX improvement. Collaborative Spirit: Strong communication and collaboration skills, essential for a More ❯

in HTML, CSS, TypeScript, and React JS. Familiarity with cloud platforms like Azure and data retrieval libraries such as react-query. Testing Savvy: Experience with testing frameworks like Playwright, Jest, and React Testing Library. Design and Usability: Working knowledge of Material-UI library and a keen eye for UX improvement. Collaborative Spirit: Strong communication and collaboration skills, essential for a 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 ❯

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 ❯

C# Using a full-stack meta framework (Next.js, Remix, Astro) Developing REST and/or GraphQL web services and APIs (C# and Node.js) Writing both Unit and E2E tests (Jest, Playwright) Working with and deploying to cloud platforms (Azure) Developing for SaaS, PaaS and/or e-commerce applications Writing integrations to third-party services Proficient experience with UI design More ❯

for designing workflows Familiarity with CI/CD pipelines (e.g., Jenkins, GitLab CI) and containerization (e.g., Docker, Kubernetes) Knowledge of unit testing and integration testing frameworks (e.g., JUnit, Mockito, Jest, React Testing Library) You may be assessed on key critical skills relevant for success in the role, such as risk and controls, change and transformation, business acumen, strategic thinking, digital More ❯

Professional experience working with Redux Professional experience working with Git, Git Flow Knowledge of CSS preprocessors, (eg. SASS/LESS/CSS-in-JS/Tailwind) Experience testing with Jest/React Testing Library Desirable experience with DevOps tools Desirable experience with Websockets Desirable experience with ES6, Styled Components, Material UI Desirable experience with OpenFin Desirable experience in Finance, specifically More ❯

C# Using a full-stack meta framework (Next.js, Remix, Astro) Developing REST and/or GraphQL web services and APIs (C# and Node.js) Writing both Unit and E2E tests (Jest, Playwright) Working with and deploying to cloud platforms (Azure) Developing for SaaS, PaaS and/or e-commerce applications Writing integrations to third-party services Proficient experience with UI design More ❯

TypeScript, Node.js, React, and GraphQL MongoDB Atlas AWS-based infrastructure using ECS, Lambda, and CloudWatch CI/CD pipelines with GitHub Actions, Terraform, and IaC Testing via Cypress (E2E), Jest/Vitest (unit) Observability with tools like Sentry, Datadog, or New Relic You won’t be starting from scratch, the platform is already live and scaling, but there is real More ❯

modern front-end frameworks and templating languages. Experience in building accessible compliant user interfaces. Proven ability in delivering thorough unit level test coverage using common testing frameworks such as Jest or Mocha. Experience integrating with a wide range of technical systems including database technologies (SQL or NoSQL), caching tools such as Redis and API Microservices, all deploying into cloud-based More ❯

modern front-end frameworks and templating languages. Experience in building accessible compliant user interfaces. Proven ability in delivering thorough unit level test coverage using common testing frameworks such as Jest or Mocha. Experience integrating with a wide range of technical systems including database technologies (SQL or NoSQL), caching tools such as Redis and API Microservices, all deploying into cloud-based More ❯

modern front-end frameworks and templating languages. Experience in building accessible compliant user interfaces. Proven ability in delivering thorough unit level test coverage using common testing frameworks such as Jest or Mocha. Experience integrating with a wide range of technical systems including database technologies (SQL or NoSQL), caching tools such as Redis and API Microservices, all deploying into cloud-based More ❯