Top QA Engineer Jobs in London

Hands-on Senior QA Engineer responsible for ensuring quality across Moneybox products. Act as sole QA on squads, define testing and release strategies with stakeholders and Compliance, drive automation and AI tooling, assess test automation suitability, run cross-functional meetings, mentor QA team members, and represent the company externally.

Designs QA strategies, evaluation frameworks, quality metrics, and automated testing systems for GenAI and agentic applications. Develops Python-based end-to-end tests across APIs, UIs, performance, prompts, and regression scenarios. Performs adversarial testing for hallucinations, bias, and security issues; builds monitoring and alerting systems; maintains golden datasets; and establishes testing best practices for reliable, safe, and trustworthy AI features.

Develop automated QA strategies and evaluation frameworks for GenAI and agentic systems. Build Python-based tests across APIs, UIs, performance, prompts, and regression scenarios. Measure model accuracy, relevance, safety, consistency, and latency; curate test datasets and golden examples; conduct adversarial testing for hallucinations and bias; maintain CI/CD test integration, production alerting support, documentation, and user acceptance testing.

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 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.

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.

QA Test Engineer responsible for planning and executing manual and automated tests across web-based digital platforms. Duties include creating test cases, developing automation scripts, collaborating with developers, managing test environments, analyzing failures, reporting defects, and improving testing processes. The role requires Agile SDLC experience and covers mobile, tablet, and desktop applications.

Perform manual and automated testing for web-based digital platforms across desktop, tablet, and mobile environments. Develop test plans, cases, and automation scripts; collaborate with developers; maintain test environments; investigate failures; document defects; report results; and improve testing processes. The role requires Agile software delivery experience, SDLC knowledge, analytical skills, attention to detail, and strong communication.

Build and own test infrastructure for distributed financial-data services, including frameworks, CI/CD execution, ephemeral Kubernetes environments, contract and end-to-end testing, performance testing, test-data management, and quality signals. Develop testing approaches for AI-enabled features using probabilistic assertions and evaluation harnesses. Improve reliability and reduce flakiness, establish engineering-wide testing practices, enable teams through tooling and documentation, and partner with SRE and AI evaluation engineers.

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.

Designs and maintains telecom QA test campaigns for roaming partners, network changes, and service launches across data, voice, and SMS. Manages SIM/eSIM testing infrastructure, builds automated smoke and regression pipelines, defines service-health KPIs, and integrates tests into CI/CD release gates. Performs geo-redundancy, failover, capacity, and signalling tests, analyzes protocol traces and monitoring data, supports root-cause analysis, and develops alerts, runbooks, and regression coverage.

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.

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.

Lead QA and production-readiness activities for an AI-enabled digital platform. Define and execute functional, integration, regression, end-to-end, API, and workflow testing; maintain automated test coverage; support UAT, defect management, releases, and go-live decisions. Evaluate AI-generated outputs and RAG retrieval quality for accuracy, relevance, grounding, consistency, and hallucinations. Collaborate with engineering, product, and operations teams to investigate and resolve defects.

Design, develop, and maintain automated functional and regression test suites (C#, BDD). Execute API, UI, and exploratory testing, integrate automation into CI/CD (GitHub Actions), leverage AI-assisted tools, collaborate across teams, produce BDD scenarios, QA documentation, and promote automation best practices.

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.

Drive quality assurance for web features from technical handoff through production release. Responsibilities include test planning, test case creation, functional and exploratory testing, regression, UI/UX, cross-browser, responsive, API, and end-to-end testing. Support releases through build validation and monitoring, document and review tests, collaborate with product and engineering teams, improve QA metrics, and optionally contribute to test automation.

The Quality Assurance Engineer will develop tests for sports technology products, improve product quality, collaborate in Agile teams, and maintain automated test suites.

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.

Design and implement Python testing frameworks, conduct ETL testing, and collaborate in a CI/CD environment focusing on cloud-based data platforms.

Designs and maintains automated UI, API, database, regression, integration, end-to-end, performance, and load test suites for a SaaS platform. Integrates quality gates into CI/CD pipelines, partners with developers and product teams in agile workflows, uses AI/LLM tools to improve testing efficiency, maintains technical documentation, and drives defect reduction and continuous quality improvement.

Validate and automate testing for AWS serverless, event-driven and modernized applications. Design and run functional, integration, contract, performance, resilience and security tests. Build automated test frameworks, integrate with CI/CD, leverage AWS Kiro for AI-assisted test generation and validation, and support migration/regression testing across microservices.

Build and maintain end-to-end automated test frameworks for web and API platforms, integrate tests into CI/CD, own test coverage, write bug reports, and improve test reliability and speed.

Hands-on QA Engineer responsible for test strategy, manual and automated testing (Selenium, BDD), writing and executing test plans, reviewing stories and code, participating in agile ceremonies, maintaining test documentation and improving QA processes across the software delivery lifecycle.

Own manual and automated QA for web (Vue.js/Rails) and native mobile (iOS/Android) plus React Native. Drive shift-left testing, maintain TestRail, perform smoke/regression releases, improve automation coverage, and act as a release gate to ensure high reliability in safety-critical rail B2B SaaS environments.