Top QA Engineer Jobs in Cologne

Owns central quality assurance for banking resilience scenarios, reviewing technical acceptance criteria, test evidence, system dependencies, data, batch processing, recovery arrangements, and operational controls. The role challenges unsupported coverage claims, identifies testing limitations, designs targeted tests, assesses resilience and recovery evidence, and supports risk prioritization and acceptance recommendations. Strong experience in banking system testing, migration, reconciliation, traceability, and operational recovery is required, along with German and English fluency.

Own end-to-end quality for Xsolla’s Web3 smart wallet on an Ethereum-compatible ZK rollup. Test account abstraction, signing, smart contracts, token standards, transaction lifecycle, counterfactual deployment, indexer synchronization, wallet security, and partner integrations. Build Playwright and TypeScript automation, use chain forking and transaction tracing, validate testnet-to-mainnet releases, configure AI coding tools, and mentor QA engineers.

Performs manual exploratory testing and develops automated UI and API tests to ensure product quality. Designs test cases, investigates defects, analyzes CI/CD test failures, verifies data integrity, and documents testing procedures. Collaborates with developers and stakeholders throughout the development lifecycle, contributes to QA process improvements, and supports reliable product delivery using tools such as Playwright, Git, Docker, and observability platforms.

Maintains quality records and systems, coordinates change controls, conducts investigations and audits, supports product release, recommends corrective actions, and ensures GMP and regulatory compliance. The role also supports technology transfer, manufacturing process improvements, employee training, quality reporting, and inspection readiness.

Leads EMEA quality assurance and regulatory compliance operations for clinical laboratory services. Oversees QA/QC activities, vendor audits, client audits, inspections, document retention, risk reviews, quality planning, and configurable systems validation guidance. Advises management and operational teams on GCP, GxP, GDPR, and regulatory requirements while supporting inspection readiness and continuous compliance. Requires leadership experience, clinical trial or laboratory quality expertise, German and English fluency, and strong organizational and communication skills.

Performs manual QA for web and mobile applications, including regression, release validation, production issue investigation, test design, bug reporting, and risk communication. Collaborates with product, development, and UX teams while using DevTools, APIs, logs, databases, and SQL to localize defects. Requires expertise in Steam trading mechanics, REST API testing, mobile compatibility, Agile/Kanban practices, and test data setup. Preferred experience includes marketplaces, payments, KYC/AML, anti-fraud, CI/CD, Git, performance testing, and security testing.

Evaluates customer support interactions, leads QA calibration, audits AI-powered quality tools, and translates grading data into actionable coaching. Maintains knowledge-base documentation, training materials, and macros, delivers refresher training, supports onboarding, and handles a limited number of Zendesk tickets during regular and peak periods. Requires strong feedback and communication skills, target orientation, customer support experience, and fluency in Dutch or German plus professional English.

Validate wireless RF and addressable RS485-based communication systems across devices, gateways, control panels, and backend systems. Execute performance, robustness, protocol, and installation tests; support test automation; prepare EN 50131 compliance evidence; document test plans, reports, and defects; and collaborate with R&D, product management, and compliance teams.

Develop and maintain automated UI and API tests using C#, enhance front-end and back-end testing frameworks, conduct performance and manual testing, monitor QA results, support UAT, estimate QA efforts, and help define automation strategy. The role also includes coaching QA colleagues, collaborating within a Scrum team, and testing cloud-based microservice applications on Microsoft Azure.

Reviews and proofreads Lithuanian localized content for grammar, accuracy, consistency, formatting, and cultural appropriateness. Executes software, mobile app, and documentation test cases; identifies, prioritizes, and reports localization defects using bug-tracking systems; verifies fixes; researches linguistic questions; and follows client style guides, glossaries, and quality standards.

Test web applications across frontends and APIs, validate AI-driven and asynchronous outputs, identify and document defects, maintain test documentation, and advocate for quality throughout the development lifecycle. The role involves collaborating with product, development, and customer support teams, using SQL and CLI tools, and contributing to test automation and software architecture discussions.

Provides quality control and compliance consulting for pharmaceutical, biotech, and medical device clients. Responsibilities include reviewing product complaints, managing reconciliations and retrievals, supporting GxP projects, audits, QMS, CAPA, deviations, non-conformances, training, regulatory compliance, and client consulting. The role may also support Qualified Person or Responsible Person activities, project delivery, and CQA marketing initiatives.

Design and execute comprehensive test plans for dApps and smart contracts, perform unit/integration/end-to-end testing, run security audits and vulnerability assessments, automate tests within CI/CD pipelines, monitor quality metrics, debug issues, and collaborate with developers and product managers to ensure reliable DeFi/EVM-compatible applications.

Manage QA/QC delivery for MEP, security, controls, and connectivity systems on large-scale data centre construction projects. Responsibilities include monitoring compliance, overseeing inspections, testing and commissioning, tracking defects and non-conformances, maintaining quality records, implementing corrective actions, verifying contractor progress, supporting reporting, and coordinating handovers. The role requires strong MEP quality expertise, stakeholder coordination, construction documentation skills, and on-site availability in Düsseldorf.

Manages Starface’s global quality systems, product testing, packaging validation, supplier quality, audits, production release, complaints, CAPA, and continuous improvement. Maintains quality documentation and product information files, leads inspections and recalls, oversees non-conformance investigations, and supports regulatory compliance for cosmetics, OTC, and medical device products. Partners cross-functionally with product development, packaging, operations, regulatory, suppliers, and customer experience teams to ensure product safety, performance, compliance, and consumer satisfaction.

Leads the engineering organization responsible for modeling, rendering, simulation, distributed computing, and quality. Owns platform roadmap execution, manages engineering managers, accelerates AI-assisted software development, improves delivery and testing processes, and balances zero-to-one product development with ongoing releases. Partners with Product and represents platform engineering to company leadership. Requires deep technical credibility and a proven record of organizational transformation, product delivery, and engineering leadership.

Own manual and automated testing for IntelliJ IDEA Ultimate features supporting JVM frameworks. Responsibilities include exploratory and regression testing, developing automated test suites, reproducing user issues, diagnosing bugs with developers, and prioritizing defects with product managers. The role requires Java or Kotlin proficiency, familiarity with build tools, databases, Docker, multiple operating systems, and basic system administration.

Review and proofread Kazakh localized content for grammar, spelling, formatting, and cultural accuracy. Execute test cases, identify and report localization bugs using bug-tracking systems, verify fixes, and occasionally translate English to Kazakh. Follow project style guides, troubleshoot basic issues, and ensure quality and consistency across digital products.

Leads the end-to-end QA strategy for Camunda 8, including quality gates, automation, reliability, performance, resilience testing, metrics, dashboards, and release governance. Manages functional and reliability QA teams totaling 12 individual contributors, a principal engineer, and a manager. Partners with engineering, product, UX, documentation, and field teams to embed quality across the organization and scale QA processes for Kubernetes, cloud, and bare-metal environments.

Manual and automated QA for Pod releases: run local/staging environments, submit transactions, verify APIs/receipts/state, reproduce and report bugs, write end-to-end and headless browser tests, and build release checklists and automation.

As an Automation QA Engineer, you'll test payment integrations, define test scope, develop automation plans, and build reliable automated tests to ensure product quality and continuous improvement.

Lead a hybrid QA team to own testing lifecycle from requirements to release. Design and run manual and automated web, mobile, and API tests, develop test frameworks, improve CI pipelines, mentor engineers, track defects, and ensure high-quality releases.

Build and maintain automated test suites for smart contracts and UIs, integrate testing into development, identify and track bugs, improve test frameworks, and ensure comprehensive coverage for new features.