• Led quality control and conducted all testing activities for user-generated content (UGC) features at Yandex.Maps (hands-on testing, oversaw the creation of test plans and test cases, and analyzed results to address defects). This contributed to engagement metrics: a 4x increase in Monthly Active Users (MAU) and a 90% increase in Daily Users.• Collaborated with product managers and developers to provide comprehensive reports on whether new product features were ready for launch, prioritizing bug fixes. This resulted in most A/B experiments being successfully released to 100% of production users without major bugs.• Hired and onboarded over 14 QA Engineers, including 5 for my QA team, conducted technical interviews, and provided mentorship, resulting in 100% of new team members passing probation and becoming full-time employees.• Fully in charge of planning, prioritization, and distribution of tasks to both staff and outstaff QA Engineers, ensuring strict adherence to SLA and KPI metrics. Successfully met KPIs, with critical bugs processed within a 12-hour window.• Led the release process, managing development builds, distributing them to beta testers, and investigating user reports (3rd line support), crashes, and backend errors, resulting in a 1.3x faster defects detection.

VK – social network app with 100M+ MAU. • Fully responsible for the hands-on testing of Mobile SDKs on iOS and Android, which previously had no testing framework. Collaborated with external QA members, providing them with a testing environment, detailed test cases, and product requirements, significantly improving SDK stability.• Established the testing process from scratch as a solo manual QA engineer for web applications, developing workflows in Jira to ensure all tasks passed through testing and feature-toggle stages before production.• Led testing for the billing and payments system during the product's early stages, ensuring its reliability and functionality, which contributed to the successful launch of the first ten clients on the company's marketplace.• Automated 50+ UI tests using Selenium and integrated CI/CD pipeline automations, ensuring that builds were automatically tested before reaching the QA stage.Increased manual test coverage to 82% and achieved 63% test automation coverage, enhancing overall testing efficiency and product reliability.

Sovcombank is a top #9 online bank with more than 1 million active clients. I was in charge of testing the helpdesk ticketing system & online chat for customer service.• Performed manual functional and exploratory testing for web, iOS, and Android applications, detecting and resolving issues early, which led to a 23% reduction in post-release critical bugs compared to previous releases. • Created and updated comprehensive test documentation, enabling seamless handover to external QA engineers for regression testing, reducing the overall time for completing regression testing to 2 days.

• Provided 2nd and 3rd line support for Yandex.Search users. Resolved over 10,000 issues and handled bug reports across more than 10 Yandex services. • Facilitated communication between support, analytics, and development teams and ensured the functionality of search antivirus algorithms, contributing to improved user experience and service reliability.