Blockchains integration and backend development for fully customizable crypto trading platform that allows to trade Bitcoin and Ethereum for alt coins on an exchange. Including: • Integrated new cryptocurrencies into exchange: Neo and Ethereum blockchains, assisted with integration Tron, Iota, Stellar, Grin, Eos, Cosmos, Beam, Zilliqa including code review and acceptance plans. • Designed and created couple of scalable high-load distributed backend services with increased fault tolerance. Such as the tracking clients balances, execute and track blockchain transactions etc. Integrated them into the existing exchange infrastructure. Created unit tests for newly added logic. • Created number of utilities for external management needs (for manual accounts and balances management). • Contributed in all phases of the development lifecycle, coordinated release builds and deployments to production. • Evaluated and proposed improvements to existing system. • Designed and created set of remote API clients to communicate with locally hosted and remote blockchain nodes. • Coordinated external contractors tasks. • Solved found client side issues, coordinated fixes delivery. • Reviewed code of other team members, provided improvements suggestions. • Was responsible for keeping blockchains backend in healthy state.

Implemented backend for Lendoit project - a P2P Lending platform, which connects borrowers and lenders from all over the world in a trusted, fast and easy way using the advantages of Smart Contracts and the Blockchain technology. Including: • Created smart contracts for ICO event and for blind auction process, for financial predictions verification • Integrated Ethereum and Bitcoin blockchains support with using Hot and Cold wallet technologies. • Created set of utilities to interact with blockchains and to handle clients balances and their payments collecting for ICO needs. Implemented backend for Shiftlly project - fast and simple conversion system for cryptocurrencies, including: • Integrated external trading systems. • Added engine to track Ethereum blockchain changes and to execute and track clients transactions. Integrated Ethereum support to Knocks - a holistic trading signals management platform and your best crypto trading companion.: • Created Smart Contracts for project needs. • Created logic to interact with Smart Contracts and to track related blockchain changes. • Integrated new code to existing solution.

Implemented fiat exchange (invest.com) full backend and required microservices (such as the pairs rates monitoring, client actions processing, orders and fees processing, statistics collecting etc.) Implemented high loaded background service for Rational Enterprise Solution to track file system related user activities (disk drives, removable media, network shares). Depending on server-side response it could send documents or metadata to server database and prevent or force file deletion. Implemented psychologist assistant application (AntiStress) that provides set of tests to determine psychological type and recommendations to improve the quality of life. • Used external components to build *.docx report by templates and to convert it to pdf.

Participated in inner services design and implementation for internet marketing solutions, including: • Participated in developing an automatic text rubricating system that is designed to provide the ability to set the targeting options for the web advertising place and the current advertise subject correspondence • Participated at developing Relevance calculating module to estimate how much the HTML page content relevant to search query • Participated in 'Rookee' service development. Supported and extended Application lifetime activities monitoring system • Participated in developing distributed high-load system of parallel tasks execution • Designed and created project plan for high-load distributed web crawler