10 of 10 Permanent Jest Jobs in London

libraries (e.g., Redux, Zustand). Solid experience integrating front‐end apps with RESTful APIs, (GraphQL is a bonus). Experience with testing frameworks (e.g., Jest , React Testing Library ). Comfortable with CI/CD pipelines, version control ( Git ), modern build tools and an eye for performance optimisation. Strong understanding ...

driven APIs and managing complex, real-time data states (RxJS/NgRx). Quality: Strong advocate for WCAG accessibility, performance optimization, and robust testing (Jest, Cypress). ...

stack features using TypeScript, Node.js and React Working on real-time systems using WebSockets, Redis and SQL Driving high-quality engineering through automated testing (Jest, Playwright) Collaborating closely with DevOps on observability, pipelines and system performance Taking ownership from design through to production Contributing to code reviews and raising ...

automated testing, and infrastructure as code Tech stack: React, Node.js (Nest.js), Python/FastAPI, AWS (ECS), PostgreSQL, Kafka, Terraform, GitHub CI/CD Testing: Jest, Cypress, Pact, Pytest What they’re looking for: • Strong experience building distributed systems/microservices architectures • Deep hands-on expertise with Node.js and React • Solid ...

features across the full stack of a high- performance trading platform . Work primarily with: TypeScript ( Node. js & React) Monorepo tooling, GitHub, GitHub Actions Jest, Playwright Redis, MS SQL, WebSockets Docker, Kubernetes Observability tools ( Grafana, Prometheus, SonarQube) Take end- to- end ownership of features from design to production. Collaborate closely ...

work with a variety of technologies. You’ll ideally have experience with some of the following, or be open to learning: JavaScript: React, Node, Jest, Cypress Ruby (non-Rails environment) – nice to have AWS: EC2, ECS, Lambda, S3, SQS Databases: MongoDB & PostgreSQL They are looking for someone who is: Proactive ...

part of day-to-day engineering workflows Tech Stack You’ll primarily be working with: TypeScript (Node.js & React) Monorepo tooling, GitHub, GitHub Actions Jest, Playwright Redis, MS SQL, WebSockets Docker, Kubernetes Observability tooling (Grafana, Prometheus, SonarQube) Requirements 8+ years of professional software development experience 3+ years hands-on TypeScript experience ...

stack: Designing, building, and maintaining features for an internal trading platform Working with: TypeScript, Node.js, React, Redis, MS SQL, WebSockets Docker, Kubernetes, GitHub Actions, Jest, Playwright Grafana, Prometheus, SonarQube Taking end‐to‐end responsibility from design → production Collaborating closely with platform/DevOps engineers Enhancing observability, automation, and operational excellence ...

implement improvements. Required Qualifications & Experience Strong TypeScript and React experience (React 16+). Proficient in JavaScript ES6+. Experience with React Testing frameworks like Jest and Enzyme. A keen sense of design and desire to build a better mousetrap. General understanding of supporting infrastructure: git, microservices, containers, etc. Comfortable working with ...

moving, ambiguous environments where experimentation is encouraged What You’ll Work With: Tech Stack Frontend: React Backend: NestJS, Python (FastAPI), LangChain Test Automation: Pact, Jest, Cypress, Pytest (including AI testing) Infrastructure: AWS ECS, PostgreSQL, Kafka Infrastructure as Code: Terraform (native AWS services where possible) CI/CD: GitHub-based tooling ...