- Added multi-tenancy to services;- Designed and implemented a complex orchestration SAGA pattern, reducing errors in player promotion activities by 15%;- Collaborated with SRE to implement open telemetry between services and build an alert system;- Designed and developed CRM subsystems from scratch;- Enhanced team productivity by 20% through clear communication, and mentorship of engineers and QA staff;- Optimized application workflow using Event Store DB, reducing costs by 5 times.

- Led a team of 3 engineers and QA, achieving a 20% increase in project delivery speed, directly impacting 2+ major projects;- Contributed to the development of an event system for CRM, simplifying integration with third-party products;- Worked with the project manager to transition to Kanban, reducing time-to-market from 6 to 3 days;- Developed a template-based gateway using YARP with customizations for the CRM system;- Optimized APIs and database queries (Postgres), reducing response time from 2 seconds to 50 milliseconds;- Revamped the player segmentation system, decreasing the recalculation time for player segments from 24 to 5 hours.

- Led a subteam of developers and QA;- Led the successful migration of EventStoreDB to GCP and resolved rolling update issues in the Kubernetes (K8S) cluster for .NET applications, eliminating system downtime, enhancing reliability, and improving the SLA from 99% to 99.5%;- Collaborated with the DevOps team to integrate an Istio service mesh infrastructure and implement a blue-green deployment using Kubernetes (K8S) and Argo CD for a system developed with Microsoft Orleans, reducing system downtime from 5 minutes to 10 seconds;- Mentored two QA automation engineers for 6 months, teaching C# and computer science fundamentals, which led to their promotion to developers.- Conducted root cause analysis (RCA) after system failures, implemented metrics and alerts, and actively participated in developing an on-call schedule. As a result, every team member was involved in product monitoring.

- Maintained order processing, pricing and distributing flow, notification service;- Migrated users APN accounts to Firebase using .NET and Firebase Cloud Messaging (FCM);- Created a real-time chat between dispatchers and drivers;- Covered the services with unit, integration, and load tests, which helped reduce the number of bans by 40% and decreased regression time to 1 day per service;- Collaborated with DevOps to migrate services from on-premises to the cloud, which increased the SLA from 98% to 99%;- Implemented real-time configuration management using k8s config maps, which simplified the entry threshold;

- Contributed to enterprise web solutions which aggregated, analysed and processed information from different sites. Designed program modules to collect information from websites;- Maintained on premise applications which were written using .Net 4.5 Framework;- Created simple Windows services and Desktop applications.

- Tested vehicle management software system;- Led the team of 15 people. Management of the hiring and firing process;- Managed the critical infrastructure of complex buildings;- Planned the annual and quarterly budget of the business unit and monitored its compliance.