7 of 7 Remote/Hybrid Vitest Jobs in London

Lead Software Engineer - Solution & Data Architecture - B2B SaaS Fintech

Location
Greater London, England, United Kingdom
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 ...

Web: Full Stack Tech Lead

Location
Greater London, England, United Kingdom
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 ...

Frontend Developer (Vue.js & React)

Location
Greater London, England, United Kingdom
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 ...

Full Stack Software Engineer 2

Location
Greater London, England, United Kingdom
requirements You must have experience and practical knowledge in: TypeScript Next.js and React Unit testing with libraries like Jest, React Testing Library, or vitest e2e testing tools like Cypress or Playwright Strong problem - solving skills and attention to detail A passion for engineering craft - you practise writing maintainable code, reviewing ...

Full-stack AI Engineer

Location
Greater London, England, United Kingdom
functionally with Product, Design, Compliance, and other engineering teams to deliver impactful solutions Frontend: React, TypeScript, Material-UI Module Federation (Micro-frontend architecture) Vite, Vitest Python 3.13, FastAPI LangGraph (AI agent orchestration) LlamaIndex (RAG/vector search) AWS Bedrock Infrastructure: AWS (ECS Fargate, Lambda, API Gateway, S3) Terraform, GitHub Actions ...

Senior Frontend Design Engineer – Outside IR35 – London

Location
Greater London, England, United Kingdom
strong eye for detail and product quality Experience creating reusable component libraries and scalable frontend architecture Strong understanding of modern testing practices (Playwright, Vitest, Jest, React Testing Library etc.) Comfortable collaborating closely with engineers, product teams and non-technical stakeholders Ability to work autonomously and deliver at pace Contract Details ...

Full Stack Software Engineer

Location
Greater London, England, United Kingdom
producing software that brings true delight to users. Core Technology Stack Frontend & UI Architecture: React v19, Next.js v16 (app Router), Typescript, TanStack Query v5, ViTest AI Productivity Tools Claude, ChatGPT, GitHub Copilot How you can make an impact Core Mission: Build secure, scalable full-stack identity workflows using modern C# … proficiency with React 1 9, TypeScript, Next.js (App Router), and TanStack Query v5. Validation & Testing: Production experience with FluentValidation, xUnit for backend testing, and ViTest for frontend utility/component testing. Architectural Patterns: Deep appreciation for CQRS, SOLID, DRY principles, and secure Backend-for-Frontend (BFF) patterns. Enterprise Security & Identity ...