As a Quality Assurance Engineer specializing in BI systems for internal company use, I ensure the reliability and performance of both backend and frontend components. My responsibilities include comprehensive API testing, in-depth documentation analysis, and contributing to process improvements that boost efficiency and quality.My toolkit includes DevTools, Postman for API testing, DBeaver for database management, PyCharm for code analysis, GitLab for version control and CI/CD integration, Airflow for orchestrating data workflows, and Argo for managing deployments and workflows. I regularly conduct code reviews to maintain high standards and proactively identify bugs, including simple security vulnerabilities.Key Achievements: • Reduced production defects by 25% through advanced testing strategies. • Expanded automated test coverage by 40%, focusing on backend and API testing. • Enhanced backend testing practices with integrated security and load tests. • Optimized QA processes, leading to a 15% reduction in release cycle time. • Identified and resolved critical bugs and security issues before release, preventing major disruptions. • Utilized Airflow and Argo for streamlined workflow management and deployment testing.These contributions reflect my dedication to delivering secure, high-quality BI solutions and efficient system operations.

In my role as a Data Services Support Engineer, I was responsible for maintaining the seamless operation of Big Data and BI systems, including real-time data processing services. I managed a technical stack comprising Airflow, Kafka, Jenkins, and Grafana, while ensuring the continuous availability of critical services such as Power BI reporting. I played a key role in the recovery of systems, even during nighttime outages, ensuring minimal downtime.I worked extensively with various databases, including PostgreSQL, ClickHouse, Greenplum, and MySQL, and administered Active Directory. My responsibilities also included writing complex SQL queries for data extraction and generating ad-hoc reports. Key Achievements:- Improved system recovery time by 30%, minimizing service disruptions.- Developed automated monitoring dashboards in Grafana, resulting in faster detection of system issues.- Led a critical data pipeline migration, reducing processing time by 20%.- Optimized ad-hoc reporting processes, cutting response time by 40%.

Key Responsibilities:Conducted testing of mobile applications and web platforms, ensuring functionality, usability, and performance across devices.Performed cross-browser testing and UI testing, validating frontend consistency and alignment with design specifications.Tested backend systems and APIs using Postman, cURL, and Charles Proxy, ensuring data integrity and correct response handling.Worked extensively with data warehouses (DWH), SQL, and Power BI, verifying data accuracy and consistency in reports.Designed and validated ETL pipelines in Airflow, ensuring seamless data integration and flow.Monitored system performance with Grafana, identifying potential issues and ensuring reliability.Automated repetitive frontend and backend test cases using scripting tools in Python and Bash.Executed manual, exploratory, and regression testing, documenting results and reporting bugs in tracking systems.Created and maintained detailed test cases, scenarios, and comprehensive testing documentation.Key Achievements:Improved mobile app quality by identifying and resolving critical network, UI, and backend issues using Charles Proxy and Postman.Enhanced web platform performance by addressing cross-browser compatibility issues.Reduced regression defects by implementing comprehensive test cases and improving test coverage by 30%.Optimized UI testing processes, ensuring accurate rendering and smooth user experience across devices.Validated and optimized backend API functionality, improving integration reliability.Identified critical performance bottlenecks during load testing, resulting in a 20% improvement in system responsiveness.Delivered actionable insights through comprehensive data testing and Power BI validation.Ensured system stability through proactive monitoring and issue resolution with Grafana.

Worked as a Technical Support Specialist at a company specializing in developing AI for poker games and selling the franchise. Maintained close communication with international partners to ensure seamless integration and support of the product. Identified and resolved software issues through detailed log analysis, minimizing downtime and improving system reliability. Administered and monitored the gameplay of bots on remote servers using emulators, ensuring optimal performance and accurate game simulations. Enhanced automation processes for server management, reducing manual interventions and streamlining operations. Provided training and guidance to partners for setting up and troubleshooting emulated environments, boosting their operational efficiency. Developed and documented troubleshooting protocols and playbooks to standardize support procedures. Collaborated with the development team to report and track software bugs, contributing to product improvement and customer satisfaction.