Top QA Engineer Jobs in Krakow

As a Quality Assurance Engineer, you will lead game testing, improve quality processes, coordinate with teams, and address game defects.

Execute end-to-end, API, integration, regression, and release testing for AI voice journeys across markets. Prepare test data, support UAT, extend automated suites, evaluate conversational AI behavior, document defects, and track them to resolution. The role requires software QA experience, voice or conversational AI testing, API testing, basic Python or JavaScript/TypeScript automation, and troubleshooting through logs and transcripts.

Lead QA strategy and automation for voice AI systems spanning speech recognition, LLMs, tools, integrations, and speech output. Own multilingual testing, deterministic and non-deterministic behavior evaluation, UAT, defect and risk management, release recommendations, and stakeholder communication. Mentor QA engineers and validate voice quality across accents, noise, latency, interruptions, customer journeys, and multiple markets.

Develop and automate tests for credit risk decisioning systems, assess algorithm and policy changes, monitor production behavior, and analyze technical implementation to identify and resolve errors. The role supports credit policy and risk assessment strategy development within a fintech environment and collaborates with risk, anti-fraud, and business stakeholders.

Architect and maintain automation frameworks, develop UI and API tests, integrate testing into CI/CD pipelines, and improve testing infrastructure. Define quality metrics, analyze results, mitigate testing risks, and report product stability. Lead code reviews, guide team members, support onboarding, automate manual testing, and improve release workflows within an Agile environment.

Lead data quality and QA automation for backend systems, data pipelines, ETL/ELT processes, warehouses, and transformations. Define testing strategy, build scalable automation frameworks, validate data with SQL, integrate tests into CI/CD, establish QA standards, manage release readiness, and use AI tools to accelerate test development and debugging.

Supports Financial Reporting users by tracking and troubleshooting inquiries, resolving Unity application issues, analyzing and automating manual processes, testing system upgrades, and supporting new product rollouts. The role also contributes to process improvements, wellness checks, user training, and collaboration with business and systems teams.

Designs, develops, executes, and automates QA tests for NVIDIA Ethernet switch features and releases. Reviews architecture and requirements, performs regression, performance, functional, and security testing, reports and reproduces bugs, investigates root causes, verifies fixes, and develops Python-based automation frameworks and APIs.

Lead quality validation for virtual networking silicon and software by reviewing designs, developing Python and Pytest automation, executing functional, performance, and security tests, debugging defects, validating fixes, and collaborating with R&D throughout feature development. The role requires deep networking protocol expertise, Linux proficiency, and experience testing technologies including BGP, EVPN, VXLAN, QoS, and RoCE.

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.

Develop and maintain automated front-end and back-end tests using C#, TypeScript, Playwright, and API testing tools. Plan tests, monitor results, run performance testing, support UAT, estimate QA work, and help define automation strategy. Coach QA colleagues, contribute to Scrum processes, and explore AI-assisted development and testing practices.

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.

Owns quality verification for AI-assisted migration of legacy desktop financial applications to modern web solutions. Responsibilities include designing test strategies, defining traceable behavioral specifications, developing automated quality gates, testing REST APIs and web front ends, validating data against legacy systems, measuring test effectiveness, conducting acceptance testing, and delivering knowledge transfer to client engineering teams.

Designs and executes manual and automated tests for advanced energy applications supporting power-grid monitoring and operations. Develops Python-based test automation, integrates tests into Azure DevOps CI/CD pipelines, validates software with laboratory equipment, manages defects and reporting, and collaborates with developers and product teams in Agile environments. The role also mentors colleagues and contributes domain expertise in power systems and quality engineering.

Own end-to-end QA for a .NET product as the sole QA engineer. Define testing strategy and quality standards, build automation frameworks, create automated and exploratory tests, integrate testing into CI/CD, investigate defects, collaborate with stakeholders, and assess release readiness and quality risks.

Lead hands-on QA automation across squads using Playwright for UI and API testing. Build scalable test frameworks, quality gates, test data and environment patterns, and reliable CI/CD pipelines. Resolve flakiness, regressions, and systemic quality issues while advising on test strategy and automation architecture. Mentor QA engineers on Playwright, CI, and responsible AI-assisted testing, and communicate quality risks to engineering and product leadership.

Design, maintain, and improve automated UI, API, and integration tests using Playwright, JavaScript/TypeScript, and/or Python. Execute functional, regression, smoke, and end-to-end testing; manage test data and environments; run suites in CI/CD; reduce flaky tests; validate APIs and data; and collaborate with engineering and product teams to identify and resolve quality risks.

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.

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.

Develop and maintain manual and automated tests for web applications, APIs, databases, and supporting infrastructure. Create test plans, investigate defects, assess release readiness, and partner with product, business, and development teams to ensure quality. The role also involves mentoring junior testers, contributing to acceptance criteria and planning, and improving testing processes and automation. Experience with Selenium, REST APIs, CI/CD, Agile, and tools such as Jira and Zephyr is required.

Develop and maintain automated tests across web, mobile, and desktop applications. Collaborate with product, development, and delivery teams; monitor and report testing progress; and share quality-assurance best practices. The role requires Java and Kotlin programming, experience with Selenium, Appium, JUnit, TestNG, API technologies, browser developer tools, and clean, maintainable code.

Conduct manual testing for Paper.io 2, identify and document defects, create test plans, improve QA processes and tools, monitor technical KPIs, and collaborate with design, development, and central technology teams. The role owns QA activities across development and release stages while providing feedback on game mechanics, quality, and player experience.

Verifies customer software by analyzing technical documentation, building applications across multiple programming languages, diagnosing build issues, and validating functionality against requirements. Performs end-to-end manual and automated testing, documents defects, communicates findings to teams and clients, and supports continuous improvements to verification processes. The role requires familiarity with operating systems, programming languages, databases, version control, cloud technologies, APIs, and build tools.

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.

Designs and maintains end-to-end automated testing across AWS web applications and Salesforce workflows. Automates cross-platform user journeys, Salesforce Lightning UI tests, REST API integrations, webhooks, secure queues, and database verification using SOQL. Integrates test suites into Git-based CI/CD pipelines while ensuring secure, reliable synchronization of DevOps data and Salesforce metadata.