Mind Rhythms is a US-based startup that is creating a matching platform for people with similar musical preferences.• Co-designed and co-developed a 17-microservice distributed architecture, consisting of web platform, dataset preprocessing pipeline (DAG model), and utility services (e.g., logging system, message broker)• Developed and optimized compute-intensive algorithms by reducing time complexities and switching to matrix calculations, increasing performance by ~13x (~160s to ~12s) and reducing infrastructure costs by ~3.5x• Implemented unit tests for all backend microservices, increasing code coverage (~70% to ~90%)• Performed load testing, confirming stability and availability (Largest Contentful Paint (LCP) < 2.5s) during ~1,000 requests/s• Assisted in migration and scaling of compute-intensive part of the infrastructure (in-house and AWS to Google Cloud Platform), increasing throughput by ~75x (20 to ~1.5k RPS) while reducing costs by ~1.5x

RTU IT Lab is a B2M department of MIREA University (25k+ students), that works on internal and outsourced projects.“English VR” is a VR platform for teaching students English language, using scenarios created by teachers. Used by ~500 DAU.• Designed and developed an 18-microservice distributed architecture, consisting of VR application, web platform, voice recognition and generation services, and utility services (e.g., logging system, message broker, cache, API gateway)• Integrated Apache Kafka for event processing, improving scalability and increasing throughput by ~4x (~450 to ~2000 RPS)• Resolved 10+ complex production issues of critical priority and 150+ other issues (inc. heisenbugs), ensuring system reliability• Researched, compared, and integrated third-party APIs (e.g., Yandex SpeechKit, Tinkoff VoiceKit)• Implemented unit tests for backend microservices, increasing code coverage (~20% to ~85%)• Integrated API Gateway Authentication, simplifying codebase and increasing throughput by ~1.2x (~600 to ~700 RPS)• Configured and optimized CI/CD, reducing team work routine by ~8 hrs/mo• Deployed Sentry and configured logging of all microservices, reducing error discovery time (1x/day to real-time monitoring)• Led a team of 3 for 6 months: reviewing code, optimizing processes, collecting requirements, prioritizing tasks, etc.Design system is a collection of reusable components for React, used by 10+ internal frontend projects.• Implemented 11 components, including interactive and non-interactive ones• Refactored codebase, reducing amount of duplicate code (15% to 4%)Outsource projects, including various web applications, requested by other companies.• Developed ~40 interactive web-pages, integrated Third-party OAuth methods (e.g. Google, Facebook, and others)