Top QA Engineer Jobs in London

Design and maintain production-quality test infrastructure for Graphcore’s machine learning software stack. Build scalable test frameworks and CI/CD pipelines across simulators, emulators, and physical AI hardware. Create representative ML workloads, analyze execution results, improve testing and tooling, contribute to open-source projects, and mentor junior engineers. The role combines software architecture, automated testing, low-level debugging, and hardware-aware validation.

Design and maintain production-quality ML test infrastructure, CI/CD pipelines, automated testing systems, and representative workloads across simulators, emulators, and AI accelerator hardware. Analyze numerical accuracy and performance, improve testing and developer tooling, contribute to software architecture, and mentor junior engineers. The role requires strong Python, software design, Linux, CI/CD, automated testing, and C or C++ skills.

Develop automated QA coverage and evaluation frameworks for GenAI and agentic systems. Test APIs, UIs, performance, prompts, and model behavior using Python and automation frameworks. Maintain regression suites, test datasets, and quality metrics covering accuracy, relevance, safety, consistency, and latency. Support adversarial testing, production alerting, developer validation tools, user acceptance testing, and documentation of testing procedures and issues.

Build and maintain scalable automated testing frameworks using JavaScript, Mocha, and Playwright. Expand automation coverage, develop reusable test scripts and utilities, analyze results, document defects, and improve QA processes. Perform manual testing across iOS, Android, web, and TV applications while collaborating with engineers, product owners, and cross-functional teams throughout the software development lifecycle.

Own QA across the product: plan and execute testing, build automated frontend (Angular/TypeScript) and API test suites, review stories, test AI outputs and financial flows, triage bugs, and sign off releases while embedding testing into development.

The Senior QA Engineer designs and executes testing strategies, develops and maintains Playwright automation frameworks, creates test plans and regression tests, and integrates automated testing into CI/CD pipelines. The role includes defect management, requirements analysis, quality metrics reporting, agile collaboration, deployment awareness, documentation, and mentoring QA team members. The engineer also uses AI coding assistants and agentic AI to improve test authoring, maintenance, and defect analysis.

Tests batch and streaming data pipelines, Snowflake transformations, SQL-based data models, Apache Flink processing, and end-to-end integrations. Develops automated data validation and regression tests, investigates data quality issues, validates performance and reliability, manages defects, and integrates testing into CI/CD workflows. Collaborates with data and software engineering teams to improve coverage and ensure accurate, complete, and reliable data flows.

Designs, maintains, and executes Java-based UI, API, integration, regression, and end-to-end automated tests using Selenium and RestAssured. Collaborates with Agile delivery teams to improve test coverage, shift-left quality, CI/CD testing, traceability, defect management, and test documentation. The role also supports test data management, SQL validation, manual testing, non-functional testing, and continuous improvement across the software development lifecycle.

Own QA as Euler’s first dedicated QA Engineer by building automated functional, regression, and end-to-end testing for its Bubble-based SaaS platform. Develop UI, workflow, and API test suites; handle dynamic and asynchronous elements; document testing practices; report and resolve defects; and partner with engineering and product to improve coverage. The role will eventually expand into hiring, mentoring, and leading a QA team.

Validate and test blockchain and Web3 products across the development lifecycle: create and run test plans, validate smart contract and wallet interactions, test APIs and web platforms, track and verify bugs, collaborate on releases, and improve automation, reliability, performance, and security.

Design, develop, maintain, and execute automated UI and API tests using Playwright and TypeScript. Perform manual, exploratory, functional, integration, regression, and end-to-end testing across web applications, APIs, and backend systems. Maintain test frameworks, test plans, data, and cases; integrate automation into CI/CD pipelines; investigate defects; and collaborate with development, product, business analysis, and DevOps teams in an Agile environment.

Design and scale automated testing frameworks for iOS, Android, and API platforms. Integrate automated suites into CI/CD pipelines, implement mobile security, accessibility, performance, and test data strategies, and collaborate with developers, DevOps, and security specialists to improve testability and resolve complex issues. Establish automation standards, evaluate tooling, and optimize coverage for reliable software releases.

Designs and executes manual and automated tests for web software, creates test plans and cases, identifies and reports defects, performs root-cause analysis, and supports issue triage. The role collaborates with product and development teams on testability, edge cases, quality standards, and continuous improvement. It also involves API, mobile, cloud-device, and non-functional testing in an Agile continuous-delivery environment.

Senior QA Engineer responsible for defining testing strategies, building scalable Playwright automation frameworks, integrating quality checks into CI/CD pipelines, and testing functional and non-functional requirements including performance, security, and accessibility. The role includes defect triage, risk analysis, exploratory testing, peer reviews, mentoring QA colleagues, and leading knowledge-sharing initiatives. It is a 12-month fixed-term hybrid position requiring two office days weekly in Glasgow, Edinburgh, or Dundee.

Delivers risk-based quality assurance across complex technical systems. Responsibilities include functional, exploratory, API, integration, system, and end-to-end testing; investigating defects using APIs, logs, databases, SQL, and CI/CD evidence; maintaining test traceability; supporting automation and release readiness; and communicating quality risks to technical and non-technical stakeholders. The role also contributes to QA capability development, continuous improvement, and client delivery across unfamiliar technical environments.

Build QA processes, test plans, release criteria, and scalable UI, API, and integration automation for Android, iOS, and web clients. Integrate automated testing into CI/CD pipelines, conduct exploratory and release testing on real devices, and validate video playback, purchases, subscriptions, and A/B tests. Track quality metrics, flaky tests, and crash trends while collaborating with Engineering, Product, and Design to improve product quality.

Design and maintain end-to-end automated testing across AWS web applications and Salesforce workflows. Build cross-platform UI and API automation for deployments, metadata backups, integrations, webhooks, and secure queues. Create resilient Salesforce Lightning tests, validate data with REST APIs and SOQL, and integrate automation into Git-based CI/CD pipelines.

Own the quality strategy and end-to-end testing pipeline for an AI-generated product handling real-money transactions. Build automated UI, browser, mobile, pre-merge, nightly, release, and production testing gates; integrate testing with CI/CD; evaluate external tools; and improve reliability of critical financial flows. The role partners with engineering and DevOps, uses AI coding agents daily, and drives quality initiatives as an autonomous individual contributor.

Owns end-to-end QA coverage across firmware, cloud services, and mobile applications for IoT products. Tests device-to-cloud communication, APIs, business logic, connectivity failures, offline operation, OTA updates, and rollback scenarios. Analyzes device and cloud logs, develops test data strategies, prioritizes automation scenarios, and maintains smoke and regression testing processes. Requires systems thinking, embedded and mobile testing experience, API testing, Agile QA processes, and familiarity with relevant test management tools.

Perform manual and automated testing for geoscience software within an agile development lifecycle. Create and update test scripts, document defects, maintain automated testing code, and collaborate with developers and support teams. The role also provides product demonstrations, client support, training, documentation assistance, and testing feedback while requiring knowledge of software development, desktop and web applications, Windows/Linux, and geoscience workflows.

Own performance and scalability testing across a platform of microservices and event-driven systems. Design realistic load, stress, soak, and spike tests; define performance thresholds and SLOs; integrate tests into CI/CD; and diagnose regressions using observability data, logs, and distributed tracing. Build reusable test assets, influence architecture and delivery decisions, and drive stakeholders toward performance improvements. The role requires strong programming, microservices expertise, k6 experience, and proactive ownership.

Lead software verification and validation for safety-critical medical device software, developing test strategies, protocols, execution reports, compliance-as-code workflows, and automated quality gates. Drive CI/CD and test automation, apply TDD and BDD, and collaborate with systems engineers to test hardware-integrated signal-processing applications. Ensure compliance with IEC 62304 Class C and ISO 14971 throughout the software development lifecycle.

Senior QA professional responsible for designing scalable automation frameworks for mobile applications and APIs, integrating automated testing into CI/CD pipelines, and embedding quality, security, accessibility, performance, and test-data practices throughout delivery. The role collaborates with engineering, DevOps, and security teams, establishes testing standards, troubleshoots root causes, and mentors QA engineers. It is a hybrid position based in London, requiring two office days weekly.

Design, build, and maintain end-to-end automated testing for AWS web applications and Salesforce workflows. Automate cross-platform user journeys, Salesforce Lightning UI tests, REST API integrations, webhooks, secure queues, and database validations using SOQL. Integrate test suites into Git-based CI/CD pipelines while ensuring secure, reliable synchronization of enterprise DevOps data between AWS microservices and Salesforce.

Staff QA Automation Engineer responsible for defining quality engineering standards across a microservices organization. The role architects shared automation frameworks, CI testing strategies, unit, integration, contract, and service-level testing, and quality controls for canary releases. It also advances AI-driven regression optimization, change-risk analysis, mutation testing, test generation, and self-healing checks. This specialist individual contributor partners with distributed engineering teams to drive adoption, improve pipeline reliability, and establish scalable quality practices.