• Doing R&D of multi-VM blockchain L1 network [rust]

• Developed layer-2 Ethereum network called Lumio [rust]• Improved blockchain sequencer architecture to work with multiple execution layers like Aptos and Solana• Improved overall transaction network throughput to 50k+ TPS due to 2+ execution layers• Integrated Nix build system into company projects - 3 languages, 3+ workspaces, 30+ crates per workspace, artifact caching system [nix]

• Developed decentralized cross-blockchain oracle system called Dione for company’s own financial protocol [go] [solidity] [ethereum]• Developed blockchain storage for Dione [go] [lmdb]• Conducted R&D of consensus mechanisms and implemented PBFT consensus algorithm with Proof-of-Stake on-chain participation [go][solidity]• Achieved handling over 300 oracle requests per block, while block production happens every 2 sec

• Developed web service called GitJob for helping recruiters to find candidates faster matching them by technological stack.• Designed concurrent algorithm for aggregation of github users by language and framework they used in their projects - scraping 100repositories/sec [go] [graphql]• Deployment and maintaining of cloud infrastructure [linux] [docker] [docker swarm] [

• Developed web service for private daycare centers in Canada [c#] [.net] [angular] [typescript]• Developed children allergies tracking and alerting system [c#] [.net] [angular] [typescript]• Conducted R&D of convolution neural network to detect deviations in the development of the child by video recordings [pytorch] [python]

• Developed messenger app for city events and local p2p chats for Android [java] [kotlin] [android sdk]• Conducted R&D of mesh networking for local chats [go] [libp2p]• Local events and chats service development [go] [xmpp]