25 of 25 Vitest Jobs in London

Well‐versed writing, maintaining and reviewing TypeScript code at production Serverless infrastructure and AWS eco system Modern React with hooks, experience writing unit tests (Vitest, RTL) for components Modern CSS styling: Tailwind, CSS Modules, style‐dictionary and design tokens Redux experience is valued but not required - we use React Query ...

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 ...

Styled Components Material UI (MUI) Radix UI Framer Motion Custom Design Systems APIs & Data GraphQL REST APIs Contentful CMS React Hook Form Zod Testing Vitest Jest Testing Library Playwright Storybook MSW Axe/Pa11y DevOps & Infrastructure AWS Terraform GitLab CI Vercel OpenTelemetry Sentry New Relic Please note: Should your application ...

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/ ...

management and modern React patterns Commercial experience building and consuming REST APIs Working knowledge of backend technologies (Node.js, Ruby) Solid understanding of frontend testing (Vitest, Jest) Understanding of clean code within both OOP and FP Experience with PostgreSQL and SQL optimization Proficiency with Git and modern CI/CD practices ...

FastAPI, Polars, LangChain Frontend: React (TanStack Query/React Router/react-hook-form + Zod), TypeScript, nx.dev, Tailwind CSS/shadcn/ui, Vitest/Playwright/MSW, Vite, Recharts Platform: Azure, Azure DevOps (CI/CD), Kubernetes, Docker, cloud storage, messaging and events, Git, SonarQube ...

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 ...

reliability of our entire system Our stack Infrastructure: AWS, Terraform Frontend: Vercel, NextJS, React/Redux, Testcafe (or similar, Cypress, Playwright) Backend: TypeScript, Vitest, TypeORM, Python, FastAPI, SQLAlchemy, pytest, Docker Compose Experience and Skills Experience as a full stack engineer An end-to-end systems-mindset; we are building ...

state, i18next for multi-language support (FR/EN/ES), Sentry for monitoring, Mixpanel for analytics, GrowthBook for feature flagging. Testing with Vitest/Playwright, linting/formatting with Biome. Mobile : a native iOS app (Swift) dedicated to multi-screen casting in our rooms, with GitHub Actions CI/ ...

builder : Cursor, v0 , Claude Code (and friends) are daily drivers for rapid prototyping and refactors. React + TypeScript mastery: component design, hooks, performance, testing (Vitest/Jest, Playwright). FastAPI expertise: async patterns, Pydantic schemas, pagination, auth (OAuth2/OIDC), rate‐limits, background jobs. Elasticsearch fluency: mappings/analyzers (ngrams ...

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 ...

HTML5 and CSS3, including responsive design, accessibility and cross-browser compatibility Experience with modern front-end tooling: build systems (Vite, rollup), testing frameworks (Vitest, Playwright) and CI/CD pipelines Familiarity with AI concepts and tooling — including AI-assisted development, LLM integration in web applications; practical experience is a strong ...

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/ ...

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 ...

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 ...

TypeScript-first organisation. Our frontend stack is TypeScript and React, styled with SCSS, server-side rendered with Next.js and Express, and tested with Vitest & Chromatic. As a Staff engineer you’ll bring deep expertise with the latest native web technologies and modern frameworks, drive consistency across ...

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 ...

complex UI that’s robust and well-tested. 🔧 Tech Stack Frontend: Next.js 14, React 18, TailwindCSS, Radix UI, Framer Motion State Management: Zustand Testing: Vitest Backend (light exposure): Node.js, Prisma, MySQL Infra: R2 Cloudfalre, AWS S3, Vercel Auth: NextAuth.js APIs: Facebook Marketing API, TikTok Ads API What ...

data visualizations. Collaborating across teams to influence API design and ensure seamless frontend–backend integration. Our Tech Stack: Languages & Frameworks: React (TypeScript) Testing Tools: Vitest (unit testing), Cypress (E2E testing) Build Tools: Vite (for local development and production bundling) Custom Solutions: Internal design system, advanced caching mechanisms, and proprietary state ...

data visualizations.- Collaborating across teams to influence API design and ensure seamless frontend-backend integration. Our Tech Stack:- Languages & Frameworks: React (TypeScript)- Testing Tools: Vitest (unit testing), Cypress (E2E testing)- Build Tools: Vite (for local development and production bundling)- Custom Solutions: Internal design system, advanced caching mechanisms, and proprietary state ...

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 ...

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 ...

main 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 in a fintech company Our tech stack TypeScript (we don’t write plain JavaScript) React Testing: Cypress and Vitest CI/CD How we work (attitudes & behaviours) High agency: autonomous and comfortable owning a problem end-to-end, spotting what needs doing next rather than waiting to be handed ...