126 to 150 of 180 Jest Jobs in the UK

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 ❯

AWS, MySQL, PostgreSQL, RabbitMQ, Docker, Kubernetes, React & React Native, TypeScript, MobX, Redux, Stylus and SASS, Jenkins (we deploy to production as soon as we finish a feature), Behat, PHPUnit, Jest, Selenium, Maestro and Detox. How you'll have an impact Own and optimise the delivery process to ensure features reach customers efficiently, contributing directly to quarterly and yearly OKRs focused More ❯

projects. Technology We're pragmatic about our technology choices. These are some of the things we use at the moment: TypeScript, React, styled-components Python, NodeJS ️ PostgreSQL, BigQuery, MySQL Jest, React Testing Library, Cypress, pytest ️ AWS, GCP Kubernetes, Docker, Terraform, GitHub, CircleCI How we expect you to work ️ We expect you to work in these ways, as well as encouraging More ❯

Lead architectural discussions and uphold high technical standards. Promote a culture of quality, testing, and continuous improvement within your team. Technologies We rely heavily on: React & Typescript Playwright Sentry Jest , Vitest , & React Testing Library AWS Ideal Candidate 5+ years of frontend development experience in production environments. Proficiency in JavaScript/TypeScript, HTML, and CSS. Deep understanding of ReactJS & Redux. Experience … with WebRTC, Sentry, Jest/Vitest, and cross-browser testing. Ability to prioritize effectively and work well in ambiguous, startup-like environments. Desirable Skills Experience developing high-load frontend applications and maintaining component libraries. Knowledge of functional programming and cross-browser compatibility. Enjoyment of working in early-stage startups. Benefits Quarterly international team offsites. Remote and flexible work policies. Five More ❯

Required Skills Hands-on experience with containerization using Docker. Familiarity with build tools and languages such as Maven, Node.js, and TypeScript. Exposure to testing frameworks and tools (e.g., Jest, Cucumber). A good understanding of relational databases, particularly PostgreSQL. Salary £130,000 - £132,600 per year Requirements A minimum of 10 years' experience in software development. Prior experience as a More ❯

and Experience: Current commercial experience with React and state-management libraries in an Agile environment Comfortable with Typescript Experience of CI/CD tools Experience with testing frameworks i.e. Jest/Enzyme/Cypress/Selenium Would be great if you have experience (but not essential) with More ❯

JavaScript/TypeScript. Solid experience with a modern framework - Vue (our main stack) or React, and styling utilities such as Tailwind CSS. Comfort writing unit/component tests (e.g., Jest, Vitest, Testing Library). Additional Skills Knowledge of AWS (our cloud of choice) or another major cloud platform. Exposure to other languages such as Python or Scala. Interest in performance More ❯

receive constructive feedback to ensure code quality. Maintain the app code quality through SDK and dependency updates Contribute to the resolution of support requests Expand the unit test suite (Jest) and integration test suite (Detox) Essential 2+ years React/React Native experience Firm grasp of the JavaScript/Typescript language including ES syntax features up to ES2020 (Array.flat, Object.fromEntries … third-party dependencies and debugging dependency conflicts Familiarity with Redux and its terminology Experience with developing an application against JSON APIs Strong familiarity with testing using an appropriate framework (Jest, Mocha, Detox, Selenium) Experience in working collaboratively as part of a team: version control, Pull Requests, scrum/kanban etc Desired Experience with development of iOS applications on MacOS Experience More ❯

C# JavaScript frameworks: Angular, Vue.js, or React MySQL Git or similar source control tools Experience with logging/monitoring tools: Elasticsearch, Rollbar, Sentry, Jira Unit testing frameworks: xUnit, NUnit, Jest, or Jasmine Agile development methodologies Desirable Experience: AWS Terraform Benefits: Competitive base salary Flexible remote working Exposure to exciting, bespoke projects Ongoing learning and development opportunities Clear career progression paths More ❯

of the systems Requirements as a Backend Developer: 4+ years backend experience with Nodejs, microservices & REST APIs (bonus if you have Kubernetes and Mongo) Strong unit testing background with JEST You’ve pushed your own code out to production Be an enthusiastic developer. Someone who can come in and share ideas, support the team but most importantly be able to 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 ❯

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 ❯

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 ❯

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 ❯

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 ❯

. Experience in Agile development environments using modern DevOps practices. A degree in Computer Science/Software Engineering or equivalent industry experience. Experience with writing automated tests (e.g., NUnit, Jest). Experience working with relational and non-relational databases (e.g., SQLServer, Postgres, MongoDB, CosmoDB). About Amici: Founded in 2005, Amici provides a cloud-based purchasing and inventory management platform More ❯

and creating components and pages that are reusable and testable, and an understanding of architectural patterns like DDD and microservices. Proficient at writing automated tests using frameworks such as Jest, React Testing Library or Cypress. Strong knowledge of web application security and how to guard against common vulnerabilities. What's in it for you: Grow with Goodlord : your development is More ❯

engineering principles, including data structures, algorithms, and software design Solid understanding of web application architecture, including APIs, HTTP requests, databases, caching, and related concepts Used testing frameworks such as Jest to write and maintain unit tests for your code, and browser automation tools such as Cypress or Playwright for test automation Preferred Qualifications Bachelor's or Master's degree in 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 ❯

previews. Familiarity with modern build tools: Vite, or similar. Experience with CI/CD pipelines for automated testing and deployment (Jenkins and GitHub Actions). Familiarity with testing tools: Jest, Chromatic/Percy, axe-core (for accessibility). Experience with end-to-end testing tools such as Playwright. Experience with Chart.js and/or similar charting technologies. Experience with the More ❯

/UX framework (React preferred, but Svelte, Angular, or Vue also considered). Experience with state management libraries (e.g. Redux, Zustand, or similar). Proficient with testing frameworks (e.g. Jest, Cypress, Playwright) for unit, end-to-end, and automation testing. Experience working with RESTful APIs and web services integration. Strong understanding of accessibility standards (WCAG) and security best practices. Eligible More ❯

and Ionic Translate UX designs and wireframes into polished front-end interfaces Develop and maintain shared UI components, including documentation via Storybook Write clean, maintainable, and testable code using Jest and React Testing Library Partner with backend developers for API integration and delivery Act as a subject matter expert in UI/mobile development within the wider digital team Key … experience in cross-platform mobile development for iOS and Android , ideally with Next.js Strong proficiency in React , Next.js , and Ionic Familiarity with Context API , GitHub , and testing tools like Jest Proven ability to troubleshoot deployment issues and optimise user performance Knowledge of software architecture and engineering best practices Desirable : Azure, .NET, CI/CD (YAML), accessibility standards Exposure to financial 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 ❯

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 ❯