Senior Full-stack QA Engineer

🧠 Tech Level: Senior 🗣 Language Proficiency: Requires fluent Russian, as part of the team communication is conducted in Russian 🧾 Employment type: Full time 🌍 Candidate Location: Poland, other EU countries, Armenia, Georgia, Kazakhstan 🕐 Working Time Zone: CET 🚀 Start: asap 🧭 Planned Work Duration: Preliminary 3 months with potential for extension 👥 Customer Description: The customer is a global mobility and urban services platform offering ride-hailing, intercity travel, delivery, and task assistance. 🧩 Project Description: Data-collection platform spanning a worker mobile application, back office, and backend services. ⚙️ Project Phase: Ongoing 👨‍💻Project Team: frontend, 2 backend, QA, product manager 💡 Hard Skills / Must Have: • Functional, integration, API, and end-to-end testing across onboarding, task processing, data capture, review, earnings, and payouts • Testing TTL, expiry, reassignment, quotas, targeting, financial flows, privacy, consent, retention, and erasure • Experience testing financial flows, such as accruals, balances, batch payouts, and reconciliation with third-party payout providers; understanding of data privacy requirements, including consent management, data retention, and erasure. • Experience testing integrations with internal and third-party services, such as authentication, CRM and push notifications, payout partners, LLM providers, and cloud storage (S3). • Strong understanding of microservices, event-driven and asynchronous architec