Andrei Unuchak

Warsaw, Poland

• Requirement Analysis & Risk Mitigation: Collaborated with cross-functional teams to review requirements, identify testable components, and resolve ambiguities, preventing architectural and functional defects prior to code delivery.
• Functional & Regression Testing: Designed and executed test cases for new features and bug fixes, running regression and exploratory passes to protect existing functionality across releases.
• Release Gatekeeping: Ran smoke and sanity gates on release candidates to validate build stability and confirm fixes before promotion to production.
• API Validation & Test Automation: Validated RESTful API request-response cycles, status codes, and data integrity using Postman and Swagger; automated regression-critical endpoint checks with Java and Rest Assured to reduce repetitive manual verification.
• AI Quality Engineering: Built custom LLM-as-a-judge scoring pipelines using Langfuse (TypeScript) to quantify output accuracy, track hallucination rates, and trace model behaviour across prompt versions, establishing data-driven validation gates for AI agent production readiness.

Java, Selenium, RestAssured, Awaitility, JDBC, JUnit5, Postman, Swagger, Docker, Jenkins, GitHub Actions, GitLab, Langfuse (TypeScript)

Minsk, Belarus

• Regression & Integration Strategy: Conducted comprehensive end-to-end integration and regression testing, securing seamless data compatibility between internal modules and maintaining overall system uptime.
• Test Suite Optimization: Designed and maintained structured test suites derived from system specifications and user stories, directly improving functional and usability test coverage.
• Data Validation & Root Cause Analysis: Authored database verification queries and performed necessary data adjustments to isolate root causes in system logs, accelerating time-to-resolution for complex backend defects.
• Agile Process Optimization: Contributed active technical feedback during software design reviews and Agile planning phases, streamlining implementation tracks and optimizing development velocity.

Manual & automated testing, SQL (MySQL, PostgreSQL), Agile/Scrum, Jira

Minsk, Belarus

• Exploratory & Edge-Case Discovery: Performed exploratory test campaigns targeting undocumented system behaviours and edge cases, preventing edge-case defects from reaching end users.
• Defect Lifecycle Management: Owned the end-to-end bug tracking workflow, delivering unambiguous documentation, explicit steps to reproduce, and test reports that accelerated developer fix cycles.
• Hardware-Software Integration: Validated wireless communication protocols (BLE, Wi-Fi), video streaming, and telephony logic in native iOS/Android apps for connected hardware (drones, headphones, sensors).
• Hardware Test Rig Development: Used ESP32-based rigs to emulate real remote hardware devices, enabling reliable connectivity and functional testing without dependency on physical units.
• Automated Defect Reproduction: Built Java, Selenium and Appium scripts to reproduce intermittent out-of-memory defects in native mobile apps that required dozens of repeated UI interactions, replacing hours of manual repetition and enabling reliable verification of developer fixes.
• Cross-Functional Delivery: Partnered with engineering and product management stakeholders to align quality metrics, ensuring high-quality software releases aligned with deployment deadlines.

Manual testing, mobile hardware integrations, BLE/Wi-Fi, ESP32, Java/Selenium/Appium, Bugzilla