• Working mostly on server-monitoring software, I managed to refactor legacy code while optimizing the performance of metrics collection.
• Designed and built a novel tool to set up remote tunnels to servers in security-tightened environments. Acquired by RealVNC.
• Established CI/CD pipelines, packaging and delivering binaries (deb, rpm, windows), saving 10 human hours monthly.
• Suggested and implemented async job execution and monitoring, empowering customers to track metrics and create alerts for scheduled tasks.

Gained experience in communicating with stakeholders, gathering requirements, and resolving conflict situations.

At the same time, created many projects in different fields, broadening my skill set: Docker Volume Plugin for LVM, Suppliers ordering system (Node.js, Go), High-performance web-crawler (Go), Mattermost plugin (Go), and others involving Kubernetes, nginx, Linux, CI/CD, and Protobuf.

• Delivered lectures on Database Programming & Information Retrieval, Software Development Management (Agile & Scrum), and an introductory course for first-year students. Over 80% of attendees are now employed in international companies.
• Organized multiple nationwide Olympiads in informatics using open-source software.

• Mentored newcomers and spoke at internal meetups; four of my five mentees secured permanent contracts.
• Led a small team to integrate the Webinars platform (WebRTC), boosting upsell for existing customers.
• Designed the ‘Webinar Recording’ feature, enabling the saving of sessions in a playable format.
• Automated the release process using TeamCity and Fabric, saving ~20 human hours monthly.
• Optimized a permission access system for served files (OpenResty+Lua), leveraging Redis-stored permissions to significantly reduce response time.
• Designed and implemented iSpring Content Library backend, powering the “Content Library” feature.
• Developed backend .NET service for OS-independent processing of MS Equation files.
• Rewrote hundreds of test cases using Codeception, adding E2E tests, and reducing escaped defects.
• Optimized backup tool for main product sites, significantly speeding up the process.
• Reworked the hierarchical permissions system for shared files access using closure-table approach which resulted in higher RPS and lower resource usage.
• Implemented video transcoding using AWS Elastic Transcoder / SNS / S3, reducing infrastructure costs.
• Enhanced in-browser data recovery system for user statistics, reducing data loss.
• Implemented full-text search using Sphinx, enhancing user satisfaction.