Mission of the role:
We are looking for a Senior QA Engineer who automates by default, uses AI agents as everyday tools, and builds new ones where the off-the-shelf options fall short.
You will be part of one of our product squads, owning quality from requirements to release. At this level we also expect you to shape how the whole company tests: standards, tooling, and the shift from manual to automated testing.
Most of our systems today rely on manual tests. Manual testing stays part of the job, but your job is to make it the exception.
Why work at Cobuilder?
- A key role in a growing international company
- The opportunity to influence the digitalization of the construction industry
- A highly skilled and engaged professional environment
Main responsibilities include:
• Turn requirements into a test strategy, deciding for each scenario the right level: unit, integration, API, end-to-end or manual;
• Build and maintain end-to-end and API test automation in Playwright, preferably with C# (TypeScript is also an option), and set up the CI/CD pipelines that run it automatically on every pull request, nightly and before each release;
• Review the unit and integration tests our developers write in C#/.NET, as well as existing end-to-end suites, and recommend what to test where;
• Use AI coding assistants and agents to generate, run and maintain tests, and build our own agents and automations where they add value;
• Test manually where automation does not exist yet, and plan how to automate it;
• Plan and run functional, API, and performance and load testing of complex web applications;
• Maintain test plans and test cases in Azure DevOps Test Plans;
• Report test results and quality risks clearly to engineers, product managers and business stakeholders;
• Define testing and automation practices across squads and help developers and other QA engineers adopt them.
What we are looking for:
• 5+ years in software QA, including 3+ years of hands-on test automation for web applications;
• Strong Playwright skills with C# (preferred) or TypeScript; you write test code that others can maintain;
• Ability to read C#/.NET code and judge whether unit and integration tests cover the right things;
• A clear view of the test pyramid and when each level of testing pays off;
• Experience testing REST APIs and running performance or load tests (for example k6, JMeter or Azure Load Testing);
• Hands-on experience setting up and maintaining CI/CD pipelines (YAML) that run automated tests, including environments, test data, parallel runs and results reporting;
• Daily, hands-on use of AI coding assistants or agents in your testing work, with examples you can show us;
• An automation-first mindset, while still being thorough when testing manually;
• Fluent English, written and spoken.
Nice to have:
• You have built LLM-based automation tools yourself, for example Claude skills or plugins that use Playwright MCP server;
• Experience with Azure DevOps Test Plans and CI/CD Pipelines;
• Background in data or B2B SaaS products.
Work-life at Cobuilder:
Hiring process:
We strive to be efficient, and we have 2 steps for hiring:
- Technical interview:- Prepare a GitHub account, you will be invited to a private repository during the interview.
– Prepare to share your screen, so if you have your own setup, feel free to use it. Make sure you can enable and disable your AI assistant.
- Interview for background check and cultural fit