pigeoncatcher

- Led a small team developing a MultiVM (EVM/Solana runtimes) layer-1 blockchain solution using CometBFT consensus layer [rust] - Developed in-house Merkle tree library for blockchain state [rust]. - Developed on-chain DEX trading indexer using Uniswap contracts [rust]. - Configured and deployed L1 EVM network based on Cosmos SDK with short block time - 3 seconds per block. - Set up and deployed L2 EVM network (Arbitrum fork). - Did backtesting for trading strategies.

- 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 oracle network for cross-chain interoperability 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 100 repositories/sec [go][graphql]. - Deployment and maintaining of cloud infrastructure [linux][docker][docker swarm][githubactions].

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