Senior QA Engineer (freelance)

Responsibilities

• Compatibility testing: make sure devices, sensors, gateways, protocols, and platforms actually play well together
• Functional testing: data collection, storage, processing, real-time monitoring, control, integrations
• Performance testing: behavior under different workloads, networks, and physical conditions, finding bottlenecks and latency
• Security testing: vulnerabilities in devices, communication protocols, transmission, storage, access, auth
• Mentor less experienced testers, raise the bar on QA practices
• Take part in requirement discussions and daily calls, flag inconsistencies and open issues early
• Share knowledge inside the QA chapter and across the company
• Use AI tools as part of your daily workflow, not as a party trick
• Fully remote. We have a pet-friendly office in Warsaw and a coworking space in Gdansk if walls and coffee machines motivate you, but nobody will ask why you're not there. Working hours are flexible: most of the team operates between 10:00 and 18:00 CET, and that's when most meetings happen. Evening calls with US-based…

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