We created an innovative marketing solution which offers interactive widgets with your design and collaborative activities (like polls or games) on live-streams.* Developed and maintained a high-performance backend API with GoLang for server-based UI and collaborative actions.* Created an analytics system based on ClickHouse, handling tens of thousands of input events per second, providing fast and actionable insights.* Developed proprietary WebSocked server to get best performance. Developed solution was battle-tested during the Dota 2 EPICENTER Major event when it handled 400,000 simultaneous viewers..* Designed and maintained an internal proto-framework to simplify development of services and reduce integration costs.* Established GitOps pipeline to simplify development processes and streamline releases.* Directed DevOps practices like CI/CD and extensive telemetry (metrics/logs) to minimize the total cost of system ownership.

* Led a smooth migration to a service-oriented architecture, enhancing deployment times and simplifying regression testing.* Utilised Golang for infrastructural parts and business logic to maximise performance* Assessed perspective technologies and delved into NLProc systems such as Spacy.* Enabled rapid market deployment of a new grammar exercise by leveraging existing website content through NLProc tools.

* Support existing development process while leading a team of developers* Facilitate migration to a more service-oriented architecture to replace legacy system in a steady manner* Improved deploy time from hours in legacy parts to minutes in new ones and time-to-market from months to weeks* Curate development of an internal framework that streamlined the process of creating new components and enable ability to communicate legacy and new components

* Developed integrations with external systems* Introduced a system that enabled the support team to efficiently track and structure appeals from users* Developed a system for scheduling lessons for teachers and students via email

* Writing code for projects developed for external clients (full-stack outsource developer).* Working as a full-stack developer on an e-currencies exchanger.

* Writing code for a backend and a frontend for a magazine website. * Developed the system to sync advertisements from a magazine’s internal DB to a website.* Worked as an independent contractor (full-stack developer) for various companies on a project basis.