[For Hire] QA Engineer + LLM evaluation

Hi everyone,

I'm a QA engineer with 7+ years of experience, looking for remote or contract work. I work as an independent contractor (through my own company, so invoicing is simple), and I'm open to clients anywhere.

I test software and find the bugs that slip past everyone else — before your users hit them. Seven years across fintech, healthcare, and e-commerce, on systems where a quiet bug costs real money or breaks trust.

The QA side:

• Manual, functional, and regression testing
• API testing (Postman, Swagger) — basically checking that the behind-the-scenes parts of an app return the right data
• SQL / database validation — making sure what the app shows actually matches what's stored
• Cross-browser and cross-device testing
• Writing clear test cases, bug reports, and documentation

The AI side:
Over the last year I moved into testing AI. I built CrossCheck, a system that takes one question, runs it through several AI models, and has them check each other — then shows where they disagree or make things up (hallucinate), instead of trusting one confident-sounding answer. So beyond normal QA, I can evaluate AI/LLM outputs: catching hallucinations, wrong facts, and cases where the model ignores instructions. If your team ships AI features and needs someone to check the quality, that's me.

Practical stuff:

• Remote, any timezone (I'm flexible)
• Contract or freelance
• English: solid written; comfortable working async
• Portfolio: platilus.com/nikita-kalachev

Happy to start with a small paid test task so you can see the work before committing. If you're hiring or know someone who needs QA or AI-output testing, drop a comment or DM me. Thanks!