18 of 18 Vitest Jobs in London

TypeScript, JavaScript, HTML and CSS Experience integrating with REST APIs Solid .NET/ASP.NET Core experience Experience with automated testing tools such as Playwright, Vitest, Cypress or Jest Experience using Claude Code or similar AI-assisted development tools Git, CI/CD and Agile delivery experience Desirable Microsoft Azure Bicep ...

TypeScript, JavaScript, HTML and CSS Experience integrating with REST APIs Solid .NET/ASP.NET Core experience Experience with automated testing tools such as Playwright, Vitest, Cypress or Jest Experience using Claude Code or similar AI-assisted development tools Git, CI/CD and Agile delivery experience Desirable Microsoft Azure Bicep ...

services such as identity-verification and lead-management providers behind clear interfaces. Write unit, component and end-to-end tests using tools such as Vitest, Testing Library and Playwright. Investigate defects, use logs and development tools to understand their cause, and deliver well-tested fixes. Follow secure development practices ...

development and design systems (e.g. Storybook) REST and GraphQL API integration Build tooling such as Vite or Webpack Automated testing with tools such as Vitest, Jest, Cypress or Playwright Responsive, accessible UI development (WCAG standards) CSS architecture (e.g. Tailwind, SCSS, CSS Modules) Git and modern software development workflows CI/ ...

quickly get up to speed on) our stack: React Native/Expo, Railway, GitHub (incl. CI and end-to-end testing), Playwright, Vite/Vitest, Google Cloud, AWS, Twilio, and Stripe Eligible to work in the United Kingdom Nice to Have: TanStack Start/Router experience A passion for music ...

CloudFormation or Terraform where customer environments require them Build and maintain CI/CD pipelines (GitHub Actions) and automated test suites: Jest/Vitest unit tests, Playwright E2E and API tests, and integration tests against live Connect instances Follow phased rollout patterns for production contact centers where downtime is measured ...

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/ ...

third-party services, including identity-verification and lead-management providers, while keeping transport details behind well-defined interfaces. Write meaningful tests at every layer: Vitest unit and route tests, Testing Library component tests, and Playwright end-to-end journeys against a real database running in Docker. Build with the needs ...

while remaining collaborative and outcome-focused. Technical Skills React 18 TypeScript (Strict Mode) TanStack Query, Form and Router Tailwind CSS Radix UI/shadcn Vitest React Testing Library Mock Service Worker (MSW) Nice to Have While not essential, experience in any of the following would be highly beneficial: Auth0 ...

with state management libraries, such as Zustand. Ability to write clean, maintainable and testable code. Experience with writing automated tests and testing frameworks like Vitest and Playwright. Experience consuming and helping shape REST API contracts, including working with an OpenAPI specification. Ability to implement beautiful styles using CSS. Real experience ...

React Three Fiber, WebGL, Deck.gl) Real Time data flows: Comfortable working with Real Time data and async patterns (WebSockets, workers) Writing testable, reusable code: Vitest/Jest/Playwright, Storybook, design systems Data visualisation: Presenting complex data intuitively; geospatial experience is a plus UX/UI (desirable): A strong sense ...

React Three Fiber, WebGL, Deck.gl ) Real-time data flows: Comfortable working with real-time data and async patterns (Websockets, workers) Writing testable, reusable code: Vitest/Jest/Playwright, Storybook, design systems Data visualisation: Presenting complex data intuitively; geospatial experience is a plus. UX/UI (desirable): A strong sense ...

identity verification, document upload, and OpenAPI-generated API clients Experience implementing roles and permissions in both the interface and API Habit of testing with Vitest, React Testing Library, and MSW against coverage gates Experience building accessible software to WCAG 2.1 AA standards with Tailwind, Radix/shadcn, and Storybook Real ...

Strong React, TypeScript and RxJS experience. Experience with Redux/Context API, WebSockets and Vite. Knowledge of micro-frontends and modular architecture. Experience with Vitest, Playwright, Storybook or similar. OpenFin experience is advantageous. Financial markets experience, particularly FX, Fixed Income or Electronic Trading, is highly desirable. Strong communication, leadership ...

well Desirable: energy domain knowledge Our stack React (required) TypeScript (required) Next.js on Vercel (desirable) GraphQL w/Tanstack Query (desirable) React Testing Library & vitest and/or msw (desirable) We have a preference for candidates who can work hybrid from our London office, but we're open to fully ...

skills; able to design and build robust, well-typed libraries and components Experience with modern front-end tooling: build systems (Vite,rollup), testing frameworks (Vitest,Playwright) andCI/CD pipelines Familiarity with AI concepts and tooling — including AI-assisted development, LLM integration in web applications; practical experience is a strong ...

daily basis. Our Tech Stack includes TypeScript, Node.js, React/Vue/Svelte, Vite, esbuild, Babel, pnpm/npm, GitHub Actions, Jest/Vitest, Playwright/Cypress, NestJS/Express, REST/GraphQL (check details from Stack Share Profile ) Responsibilities: Develop scalable, maintainable web applications regardless of framework (React … higher – must be comfortable with technical communication, documentation, and client interactions Nice To Have: Monorepo setups (Nx, Turborepo), Storybook, Playwright/Cypress, Vitest/Jest Performance monitoring (Lighthouse, Web Vitals) and logging/observability Security best practices (CSP, SRI, OWASP, dependency auditing) CDN, edge functions, SSR/SSG, ISR architectures ...

single page application that runs on React 18, TypeScript (strict), TanStack Query/Form/Router, Tailwind + a Radix/shadcn component system, Vitest + RTL + MSW. You make the design calls on your domain and argue them out with the tribe. You build … verification, document upload and OpenAPI-generated API clients. Roles and permissions. Enforced in the interface as well as the API. Testing as a habit. Vitest, React Testing Library and MSW, against a coverage gate that fails the build. You can say what a piece of code is actually protected against. ...