Senior Full-stack QA Engineer

Location: Warszawa, Poland; Madrid, Spain; Belgrade, Serbia; Bucharest, Romania; Vilnius, Lithuania; Rīga, Latvia; Almaty, Kazakhstan; Tallinn, Estonia; Tbilisi, Georgia; Yerevan, Armenia Workplace: fully 🧠 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 architectures, including retries, timeouts, idempotency, duplicate events, and eventual consistency. • REST/gRPC API testing and automation with Postman • Automated testing with Playwright, Cypress, Appium, or similar frameworks • Troubleshooting using logs, metrics, traces, databases, message queues, SQL/MySQL, Kafka, Grafana, Kibana, and CloudWatch • Ability to validate consistency across the mobile app (Kotlin), WebView, back office, backend APIs, and distributed services, and troubleshoot partial failures and partner/service outages. • CI/CD, Docker, AWS, distributed-service testing, test strategy, release validation, and production issue analysis ✨ Hard Skills / Nice to Have: • Experience testing media capture and upload on mobile devices (photo, voice, video, text), including device fragmentation, permissions, poor or unstable networks, resumable uploads, and on-device validation. • Experience testing ML/LLM-powered features and validating AI-generated outputs. 📌 Responsibilities and Tasks: • Own test strategy, test planning, and release sign-off for the platform • Test mobile media capture and upload under real-world device and network conditions • Verify task lifecycle, quotas, submissions, review workflows, segmentation, and isolation • Validate financial, compliance, consent, erasure, and audit flows • Build and maintain end-to-end and API automation in CI, including load testing 🧪 Technology Stack: Kotlin, Playwright/Cypress/Appium, Postman, REST/gRPC APIs, SQL (MySQL), Kafka, Grafana, Kibana, AWS (S3, CloudWatch), Docker, CI/CD 📞 Interview stages: • English check (15 minutes) • Internal technical interview (1-1,5 hour) • Client interview (1 hour) • Client interview – cultural fit (45 minutes) 💼 What we offer Model: B2B contract with Bonapolia - one contract, one monthly invoice Rate: negotiated per candidate seniority and client budget Payment: monthly invoice, paid on the same schedule the client pays us (usually 30 days) Contract written under your country's law We handle the client-side paperwork: MSA, NDA, invoicing 🏢 About Bonapolia Bonapolia is a family-owned IT staff augmentation team based in Lisbon. We build engineering teams for product companies and IT consultancies across Europe and the US. More at bonapolia.com