Liudas Jankauskas · QA on time
No buzzwords. Just software quality that actually holds.
I’ve been testing software since 2007. High-risk systems, high load, APIs, security, all the ugly edge cases your team stopped seeing because they stare at the same product every day.
I don’t sell “10x AI magic”. I help you ship fewer embarrassing bugs.
Where I’m actually useful
I work best in systems where bugs are expensive: money lost, angry customers, regulators, reputation. I care about risk more than about tool fashion.
High-risk & high-load systems
- Web & mobile apps that matter to the business
- Microservices, queues, APIs, data pipelines
- High load (1M+ req/s), failover, resilience
- Gov, fintech, telecom, enterprise
QA strategy, not checkbox testing
- Risk-based approach instead of “test everything” fairy tales
- Clarifying what we will NOT test and why
- Helping dev teams own quality, not throw it over the fence
- Fixing messy, pointless automation
Hands-on testing & reviews
- Functional testing of critical flows
- Performance, reliability and basic security checks
- Exploratory testing where specs are weak
- Honest review of your existing QA setup
I join as an external brain: I ask annoying questions, map risks, and then break the system in the same ways your users or attackers will.
Tool I built: Rentgen.io
I don’t wait for the “perfect” tool. When something is missing, I build it. That’s how Rentgen appeared.
Rentgen – see what you should test, not just what you can send
Rentgen takes a single API request and generates multiple tests around it: boundaries, weird values, enums, ranges and negative cases.
It’s designed for testers and developers who care about risk, not about spending their day clicking through a pretty REST client.
Built by me. Free local version, with a clear line between open-source and commercial use.
Visit rentgen.ioTraining & courses
I train testers and people switching into IT to think like testers, not to blindly follow test cases.
- Foundations of software testing and real-world QA process
- From backlog and specs to test ideas that actually find bugs
- API testing, non-functional basics, OWASP Top 10 intro
- Mix of manual, exploratory and basic automation
Let’s talk like adults
No sales scripts. Send me a message with what you’re building, what went wrong or what you’re worried about. If I can help – I’ll say how. If not – I’ll say that too.