About

Marcin Stanek

I'm an independent QA and test automation engineer (B2B, 10+ years). I help teams reduce delivery risk: tests and automation aligned with how you ship software, with concise QA context for each change - scope and risk before you run full regression.

Most tooling optimizes test execution; the hard part is knowing what deserves attention. I focus on tightening the gap between code changes and QA decisions - structured briefs from the pull request and its context (ticket, API contract), clearer risk and impacted areas, and fewer surprises in production. The goal is operational risk reduction, not novelty for its own sake.

Beyond execution automation, I design and maintain frameworks for APIs and services, wired into CI/CD so feedback is continuous - useful on its own and a foundation when you want intelligence on failures, flakiness, and scope in the same pipelines. I also work end-to-end in the lifecycle: from requirements and test design through execution and release, integrated with the toolchain your developers already use.

Longer term I'm building toward a QA decision layer in CI/CD: from structured PR briefs, through test-result intelligence, to security triage - always framed as risk reduction, not an AI gimmick.

Professional experience

Technologies and tools

  • C#
  • .NET
  • API testing
  • Docker
  • CircleCI
  • CI/CD
  • Git
  • Azure Service Bus
  • WireMock.NET
  • SQL
  • xUnit
  • NUnit
  • Led test automation for a strategic project focused on .NET services deployed on Docker.
  • Extended an existing .NET API test framework for system, integration, and vendor integration tests.
  • Integrated automated tests into Azure DevOps CI/CD pipelines.
  • Worked closely across agile ceremonies with developers, BAs, and product owners.
  • Mocked external dependencies with WireMock.NET to support lower-pyramid API testing.
  • Contributed to a risk-based, regression-aware testing strategy.

Technologies and tools

  • Selenium
  • C#
  • .NET
  • REST API
  • NUnit
  • Azure
  • Azure DevOps
  • Docker
  • Testcontainers
  • Event Bus
  • SQL
  • NoSQL
  • Gherkin
  • BDD
  • CI/CD
  • WireMock.NET
  • Databricks
  • Backend QA for a legacy modernization project in the electricity industry, validating migration of critical business logic from mainframe to .NET.
  • Integration tests for scheduled batch jobs: data processing, state transitions, and reliable overnight orchestration.
  • Verified functional equivalence and data integrity between legacy sources and new microservices using Databricks and SQL at scale.
  • Built automation frameworks from scratch for APIs and asynchronous background processes.
  • Integrated batch and regression suites into Azure DevOps CI/CD.

Technologies and tools

  • Selenium
  • Playwright
  • C#
  • .NET
  • TypeScript
  • REST API
  • NUnit
  • Azure
  • Azure DevOps
  • Docker
  • SQL
  • NoSQL
  • CI/CD
  • Snowflake
  • Led QA initiatives and quality awareness across product teams.
  • Mentored colleagues and implemented strong QA practices.
  • Designed and maintained automation for backend, frontend, and performance testing.
  • Embedded testing in CI/CD for continuous feedback.
  • Analyzed results, recommended fixes, and reported in status meetings.

  • Trained students in software QA best practices.
  • Guided new team members through their first demo sprint.
  • Developed and delivered course materials with a practical focus.
  • Mentored students on technical and professional growth.

Technologies and tools

  • Selenium
  • Java
  • REST API
  • JUnit
  • Maven
  • Docker
  • Gatling
  • SQL
  • CI/CD
  • Built automated functional and API tests.
  • Documented and tracked results; supported debugging and test documentation.
  • Onboarded new team members to QA practices.
  • Functional, integration, and performance testing.

Technologies and tools

  • Selenium
  • Java
  • REST API
  • JUnit
  • Maven
  • Docker
  • Gatling
  • Spock
  • Groovy
  • SQL
  • NoSQL
  • CI/CD
  • BDD
  • Designed, coded, and ran automated tests; maintained the team’s script library.
  • Owned test plans, defect tracking, result analysis, and corrective recommendations.
  • Partnered with developers on fixes and detailed reporting.

Technologies and tools

  • Selenium
  • C#
  • .NET
  • REST API
  • NUnit
  • Azure
  • Azure DevOps
  • Docker
  • SQL
  • CI/CD
  • Manual and integration testing with reporting in TFS.
  • Documentation, performance testing, mobile execution, and test case maintenance.
  • Test data preparation in an agile-oriented team.

Education

2011 - 2015

Cracow University of Technology, Faculty of Mechanical Engineering, Computer Science - Software Engineering

Thesis: a system supporting management training for a rowing section using Entity Framework in ASP.NET.

Certifications, languages, and focus areas

  • Languages: English and Polish.
  • Certifications: Microsoft Azure AI Fundamentals (AI-900), ISTQB Foundation Level.
  • Focus areas: test automation, backend and frontend QA, security and performance testing, APIs, CI/CD, .NET and Azure, containers, Databricks and Snowflake integrations, collaboration and mentoring.

LinkedIn profile