Senior Full-stack QA Engineer

Tech Level: Senior Language Proficiency: Intermediate 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
• b>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
• b>✨ 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.
• b>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