Przemysław Paczoski · Warsaw
I decide what to test, then I write the tests.
I'm Przemek, a QA and test automation engineer. I work with early-stage web3 teams, part-time, on test automation and test architecture.
I also run 23studio, a blockchain development studio, and build a few products of my own.
Now
Work
Things I run and build.
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23studio
Web3 venture builder and infrastructure partner. Smart contracts in Rust, product development, UX/UI and team extension. I am the CEO and founder.
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GdzieStart
A calendar of running, triathlon, HYROX, cycling and other endurance events in Poland. It collects dates, prices and registration status from organisers and keeps a public history of changes.
Offer
Part-time test engineer for web3 teams
An early-stage team usually needs two things at once: someone who decides what to test, and someone who writes the tests. I do both.
A consultant who only writes a strategy leaves you with a plan and no one to run it. A tester who only follows instructions leaves you without direction. A small team cannot afford either gap.
What I work on:
- Tests in your CI/CD pipeline
- Writing and automating test scenarios
- Test planning
- Test strategy for your product
- UX testing of the platform
I start from your goal. I find the quick wins, rank them, do them, measure what changed, and repeat. If I don't know a topic, I spend a few days on it until I understand about 80% of it, then I start.
Latest writing
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Fork testing smart contracts runs your tests on a copy of mainnet state. Learn when it helps, when it gives false confidence, and how to pin the block.
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Flaky e2e tests have five causes: timing races, shared state, order dependence, environment limits and unstable selectors. Each one reproduced and fixed.
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Sanity testing vs smoke testing explained in one table, with a worked checkout discount example and a clear answer on when you need both or just one.
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How to run tests in parallel in CI/CD with workers, shards and job matrices. A GitHub Actions example, a risk table and the shared-state bugs that appear.
Contact
Email me at [email protected]. If you want to talk testing first, book 15 minutes.