76 to 100 of 124 Jest Jobs in the UK

APIs with authentication, role-based access, tenant context and useful client-side error handling. Maintain unit, integration and end-to-end tests with Jest, React Testing Library and Cypress or Playwright. Meet WCAG 2.1 accessibility standards. Profile and optimise code splitting, lazy loading, memorisation and bundles through Jenkins and SonarQube ...

design — Express withOpenAPIor equivalent. Nice tohave: comfort with runtime type validation at trust boundaries — Zod, Yup, or similar. Nice tohave: experience writing unit andcomponenttests — Jest andReactTesting Library,Vitest, or equivalent. Nice tohave: containerisationfundamentals using Docker or an equivalent tool, and general scripting ability in Bash or PowerShell. Highly desirable: experience ...

design — Express withOpenAPIor equivalent. Nice tohave: comfort with runtime type validation at trust boundaries — Zod, Yup, or similar. Nice tohave: experience writing unit andcomponenttests — Jest andReactTesting Library,Vitest, or equivalent. Nice tohave: containerisationfundamentals using Docker or an equivalent tool, and general scripting ability in Bash or PowerShell. Highly desirable: experience ...

TailwindCSS or similar utility-first frameworks), responsive layout, and practical accessibility (WCAG), including color-blind-safe palettes and accessible charts.-Automated frontend testing with Jest and React Testing Library, including visual regression testing for charts and dashboards.-AI-enabled development:-Practical, regular use of AI coding assistants and agents (e.g. ...

About Us Solirius Reply, part of the Reply Group, delivers technical consultancy and application delivery to our clients in order to solve real world problems and allow our clients to respond to an ever‐changing ...

Livewire Knowledge of Next.js or Nuxt.js Experience with WebSockets and real-time applications Understanding of web accessibility (WCAG) standards Experience with testing frameworks (Jest, Vitest, Cypress) Familiarity with UI/UX design principles Experience building interactive interfaces and modern UIs Competitive salary based on experience Latest development equipment and tools ...

Familiarity with code versioning tools such as Git Preferred Skills Experience with TypeScript Familiarity with server-side rendering Knowledge of testing frameworks such as Jest or Mocha Experience with continuous integration/continuous deployment (CI/CD) pipelines What We Offer ZERO micromanagement. At Fogsphere, developers work independently under ...

applied experience Strong hands-on experience building enterprise web applications with React + TypeScript, including advanced component patterns. Strong experience with UI testing (e.g., Jest/React Testing Library and Cypress/Playwright) and systematic debugging/troubleshooting. Proven experience designing and delivering accessible, performant UIs (WCAG awareness, profiling, bundle ...

stack includes TypeScript, Node.js, pnpm, Turborepo, NestJS, Prisma, PostgreSQL, Redis, React, Next.js, Vite, Tailwind CSS, shadcn/ui, TanStack Query, Stripe, Auth0, Sentry, OpenTelemetry, Jest, ESLint, and Prettier. Many of our engagements run on this same foundation, so we are looking for an engineer who can operate confidently within these ...

with RESTful and GraphQL APIs; Familiarity with front-end build tools (Webpack, Vite, Rollup) and CI/CD pipelines; Experience with automated testing frameworks (Jest, Cypress, etc.); At least 1-2 years of professional experience with React Native; Hands-on experience developing a React Native SDK for cross-platform projects ...

systems (Vercel, GitHub Actions). Experience building or maintaining a design system. Experience with testing libraries and tools (Vitest, React Testing Library, Playwright, Jest). Experience using Tailwind or other utility-based CSS libraries. The stack Next.js React TypeScript Tailwind Typesense ClickHouse Vercel Shadcn/ui Jotai Why work ...

applied experience Strong hands-on experience building enterprise web applications with React + TypeScript, including advanced component patterns. Strong experience with UI testing (e.g., Jest/React Testing Library and Cypress/Playwright) and systematic debugging/troubleshooting. Proven experience designing and delivering accessible, performant UIs (WCAG awareness, profiling, bundle ...

teams Drive improvements in developer feedback loops and testing standards Technical Skills Core technologies: Java React Playwright Cucumber Selenium JUnit/Mockito REST-assured Jest Pact Nice to have: Experience with modern CI/CD pipelines Exposure to containerised environments (Docker/Kubernetes) Experience working in regulated or large-scale ...

rendering. Deep knowledge of state management (RxJS, or React Query + custom streams) and data flow patterns for streaming + request/response. Testing: Jest/Vitest, React Testing Library, Playwright; strong mock/contract testing. Security: XSS mitigation, CSP, auth flows (OAuth), secure storage, anti phishing UX. CI/ ...

reliably. Bring 5+ years of building high-performance, client-facing web apps, with backend Python, FastAPI, PostgreSQL, Redis, RESTful APIs, and frontend TypeScript, React, Jest, Storybook. You’ll mentor engineers and own deployments, CI/CD, and monitoring. #J-18808-Ljbffr ...

layer, while also extending the React front end. You will work with Azure services, implement tests with xUnit, Moq on backend and Vitest or Jest on frontend, participate in code reviews, architecture decisions, and CI/CD improvements. 5+ years of experience required, strong C#, .NET, React and TypeScript. #J ...

Experience building responsive, accessible web applications Working knowledge of GraphQL and AWS Amplify Experience implementing i18n in production applications Strong testing practices using Vitest, Jest, Testing Library, or similar Familiarity with ESLint, CI/CD workflows, and frontend quality tooling Nice to Have AWS certifications Experience with AppSync Passion ...

frontend build process, with experience using tools such asNode.js, Webpack or Turbopack, and npm or Yarn. Understanding of frontend testing frameworks such as Cypress, Jest or React Testing Library 3+ years’ experience as a frontend developer. Nice to have Understanding of deployment strategies, scalability, and load balancing Familiarity with Unix ...

framework (preferred rather than essential) Nice to haves Experience with design systems or component libraries Experience with testing frameworks (we use Cypress and Vitest; Jest or Playwright experience is just as relevant) Familiarity with CI/CD and modern frontend build tooling Some full-stack or backend exposure Previous experience ...

test 5th stage - Meet with our VP of Engineering Additional information Doxy.me tech stack Frontend: React, TypeScript, Playwright, WebRTC, Next.js, Nx.dev Backend: Nodejs, TypeScript, Jest, NestJS, Nx.dev Cloud: AWS 3rd party: Vonage, Segment, Twilio, Stripe Our team: technologists, academics, researchers, and innovators from all over the world. English ...

Java, Node.js, GraphQL, REST APIs Cloud & Infrastructure: Azure Kubernetes Service (AKS), mParticle, Salesforce Marketing Cloud, Salesforce Data360 Observability & Monitoring: Dynatrace, PagerDuty Quality & Testing: JUnit, Jest, Playwright Security & Scanning: Snyk, Semgrep, SonarCloud Experimentation & Analytics: Optimizely, Adobe, Tealium What’s In It For You Working at M&S means being part ...

Knowledge of modern React Native application architecture and state management approaches such as Redux, MobX or equivalent* Experience with automated testing frameworks such as Jest, Detox and Testing Library* Strong debugging and problem-solving skills* Experience working with large or evolving applications and contributing to their ongoing improvement* Understanding ...

libraries such as Styled Components. An advocate and implementer of industry best practices in frontend engineering including automated testing, using frameworks such as Jest and React Testing Library. What will help you thrive in the Frontend Team Our product is technically demanding - built for domain experts who rely ...

Strong experience developing React Native applications. Expertise with technologies such as TypeScript, Redux, RTK Query, React Navigation and Firebase. Experience writing automated tests using Jest, React Testing Library and end-to-end testing tools. Strong understanding of mobile architecture, performance optimisation, API integrations and application lifecycle management. Knowledge of accessibility ...

. Testing Practices: Proficient in writing and maintaining unit and integration tests, demonstrating an understanding of test-driven development (TDD) principles (e.g., Vitest, Playwright, Jest). Distributed Systems Knowledge: Familiarity of distributed systems, including building scalable and resilient services (e.g., Redis, Kafka, AWS infrastructure). Problem-Solving & Collaboration: Strong problem ...