* Created internal backend service for building hierarchy of financial instruments (from 450000 securities)* Participated in development of CPU-intensive web service for real-time data calculations, reaching 10000 requests per second with 50ms latency for 99% of user requests* Co-developed a real time calculation system capable of maintaining up-to-date numbers on 4000000 of securities* Involved in system design on all development stages – designed internal component’s architecture for data processing queue, instrument hierarchy builder and so on* Prepared technical documentation for developed services and modules

* Led the backend team on development of bond analysis system and portfolio recommender engine* Implemented transaction analytics service (from 10000 transactions per day) and document storage service for the bank partner loyalty program portal* Led the full-stack development team of 5 remote developers of digital signature portal* Improved performance of CPU-bound module responsible for providing financial information which resulted in 25% performance gain* Designed and implemented payment process modules, designed database entities, improved main dashboard widgets, performed profiling and global performance optimisation (up to 1000 active users) in corporate treasury management system* Consulted and mentored 5+ junior/middle developers across different teams

* Developed charting module and order placement module for high-performance cryptocurrency exchange system capable of processing 10000 transactions per each currency pair for indefinite time* Designed and developed investor search module with interactive map for web client of investment search system (from 1000 items)* Refactored internals of the electronic document management system (desktop), which led to 30% performance boost on average

* Developed authorization module for state bonds trading system* Played role of a full-stack developer of ed-tech project* Designed and implemented an integration test suite for over-the-counter trading system

* Participated in development of company product’s components (VPN client that uses in-house CSP)* Created a module that is responsible for downloading and storing up-to-date certificate revocation lists