Koinly★3.0 (1)· London

Work with React 19, TypeScript, TanStack (Router, Query, Table), Radix UI, Mantine, Tailwind CSS v4, Vite, Vitest, Storybook, Highcharts, Sentry, Bun, and RabbitMQ on a data platform that reconciles crypto transactions and tax obligations for Koinly’s web application, with a React Native mobile app joining scope later.

You will work with Java, Selenium, RestAssured, Gherkin, and Jira/Xray to design and maintain automated test frameworks. This cross-functional Agile squad develops complex healthcare software systems that support Genomics England’s genomic medicine and research initiatives for the NHS.

QA Engineer role using **Python** for test automation, with **Gherkin**-based test cases, **Jira/Xray**, and **CI/CD pipelines**. You will build and maintain automated test frameworks covering UI, API, integration, and regression testing for the software systems that underpin Genomics England’s genomic healthcare and research mission.

As Principal SDET, you will lead quality engineering using C#, Playwright, and Selenium for test automation across UI, API, and integration layers. You will drive the quality strategy for a financial services organisation undergoing a major business and technology transformation. This is a senior technical leadership role, not managing a specific team size.

The role involves C#, ASP.NET Core, async/await, Entity Framework Core, Git, and optionally Azure DevOps, Docker, and Playwright. You will build backend services, integration layers, and AI API integrations for large-scale websites, apps, and platforms delivered to global brands.

HCLTech★3.7 (11k)· London

Work with React, TypeScript, HTML, CSS, JavaScript, Redux, WebSockets, SSE, REST APIs, micro-frontends, and unit testing tools like Jest/React Testing Library. The role delivers high-availability, low-latency UI applications, ideally for financial services or trading platforms.

Work with TypeScript, Python, Node.js, Playwright, Cypress, WebdriverIO, Docker, GitHub Actions/GitLab CI, bash, and Jira to build and maintain test automation frameworks and CI pipelines for Connected TV devices.

You will work with Java, JavaScript, Python, or C#; open-source frameworks like Cypress, Karate, PlayWright, or Selenium; CI/CD pipelines in Azure DevOps; and JMeter for performance testing. As part of an agile team, you’ll help clients achieve business transformation goals through automated and manual testing.

You will work with React, TypeScript, HTML, CSS, JavaScript, WebSockets, SSE, REST APIs, Redux, micro-frontends, SPA, React Testing Library/Jest, and optionally Playwright or Cypress. The role involves building time-critical, high-availability, high-performance UI applications, with an advantage for experience in financial services or trading platforms.

You'll use TypeScript, Python, Node.js, Playwright, Cypress, or WebdriverIO, plus Docker, GitHub Actions/GitLab CI, and bash. The Quality Engineering team builds test-automation frameworks and CI pipelines that run on real Connected TV devices, targeting global TV users.

Build production AI agents in Python using Playwright/Puppeteer for browser, voice, and email automation. As the first founding engineer at a fintech that verifies invoices for bank-owned lenders processing $100M+ monthly, you'll own end-to-end features and step into an engineering lead role as the team expands.

React developer role using React, TypeScript, JavaScript, HTML, CSS, Redux, WebSockets, SSE, REST APIs, React Testing Library and Jest, with optional Playwright or Cypress. You will build time-critical, high-availability, high-performance UI applications, working across the full development lifecycle.

Accenture★3.9 (29k)· London

Work daily with JavaScript/TypeScript, Python, Java or C# writing automation scripts and building frameworks; drive adoption of Playwright, MCP, GitHub Copilot and Claude. As a Test Automation Associate Manager at Accenture, you lead and mentor a QE automation engineering team while owning tooling strategy and framework definition across client engagements. You also conduct quality engineering assessments and support QE strategy for client accounts.

Work across the stack with React, TypeScript, and Node.js or Golang on privacy-focused systems and architecture that keep users' location data inaccessible. As part of Wheely's small core-engineering team, you'll collaborate with Product Managers, Designers, and Software Engineers to shape solutions from concept through production.

You will work with Playwright, JavaScript, TypeScript, automation frameworks and CI/CD pipelines on a strategic front‑office derivatives trading platform, embedded within the bank’s Front Office Derivatives Technology team.

You will design and maintain automated UI, API, and service-level tests in TypeScript using Serenity/JS and Playwright, plus Python/pytest and C#/.NET. The role involves testing the ACE application and internal platform tooling for a decentralised AI platform optimising energy in data centres.

Senior Software QA Engineer at G3D will design automated testing frameworks using Playwright and TypeScript, work with Linux, Kubernetes, CI/CD, and API testing, and test AI-powered functionality on a distributed decision support platform that solves complex real-world problems.

You will work with Vue.js, Vuex, Pinia, Vite, TypeScript, and real-time data tools (WebSockets, SSE) to build high-performance trading UIs. The role is on the team that continuously improves Interactive Brokers’ critical platform for automated trade execution and custody across global markets.

Grid Dynamics★3.4 (19)· London

Build high-performance React and TypeScript trading applications using WebSockets, RSocket, and streaming market data. Work within an embedded team modernising a Tier 1 investment bank’s electronic trading platforms, migrating legacy Angular apps to React. Collaborate with backend Java engineers on mission-critical front-office systems.

You will work with Selenium, Playwright, Java, Python, and API testing tools (REST/SOAP) to develop and maintain automated test suites within CI/CD pipelines, supporting modern cloud-native digital services built on microservices architectures. As a Test Engineer at TCS, a global IT services and consulting company, you'll embed quality early in the development lifecycle, collaborating with developers and DevOps engineers on Agile delivery teams while contributing guidance and mentoring to other testers.

Develops modern web applications using Angular, TypeScript, RxJS, and REST APIs on a cloud-native AWS platform. Works on a globally used flagship product, collaborating with product, UX, backend, and ML engineers.

The Head of QA will lead the transition from manual to automated testing, using tools such as Selenium, Cypress, Playwright, Postman/Newman, JUnit, pytest, CI/CD pipelines (GitLab CI, GitHub Actions), AI-powered testing tools, and cloud platforms (GCP, AWS) with Docker and Kubernetes. The team builds cloud-based aviation fuel management SaaS products digitising the full fuel lifecycle.

Build full stack applications using TypeScript, Go, and Angular, with AI-assisted development tools (Cursor, Claude Code, GitHub Copilot) and front-end testing via Playwright or Cypress. You'll join a technology company rethinking how software is built in an AI-first engineering environment, collaborating across engineering, product, data, and research teams.

Appvia★0.0· London

Principal Software Architect role using Domain Driven Design (strategic and tactical patterns), Event Storming, microservice-based architectures, C4 modelling, and AI-assisted development practices. You will own solution design and lead domain discovery across customer modernisation programmes in public and private sectors, working alongside a growing Software Engineering practice.

You'll work with Playwright, Cypress, Selenium, Postman, Insomnia, React, React Native, Maestro, BrowserStack, Percy, k6, Gatling, GCP, Grafana, LogRocket and AI-assisted testing tools. You'll join Nando's USA Technology team building digital products powering customer journeys (Locate, Menu, Payments, Orders, Loyalty, Identity) across web and mobile to support US expansion.