andriyshuma

Develop and maintain production applications for a DEX aggregator processing more than $50M in daily volume. Work on the main trading interface, embeddable Swap Widget, Protocol Explorer, and SDK, contributing to products generating up to $350K in monthly revenue. Build cross-chain swap flows with multi-chain token routing and MEV-protected orders. Implemented staking and unstaking flows, including BPT deposit estimation, transaction execution, and UI state management. Also migrated the frontend build system from Webpack to Vite, reducing build times by around 50% and enabling near-instant hot reload.

Build Web3 applications and blockchain infrastructure for DeFi, wallet, and payment products. Developed a crypto payment solution that allows Shopify customers to pay with different tokens on Ethereum and Layer 2 networks. Improved an EOS transaction indexer and added a WebSocket interface for real-time transaction history. Built a MetaMask Snap that monitors signed swap transactions and recommends providers offering better output. Deploy and maintain backend services on AWS using Elastic Beanstalk, PostgreSQL, RDS, and IAM. Also provide code reviews and technical guidance to junior engineers.

Developed backend APIs using Node.js and PostgreSQL and built responsive frontend interfaces for a high-end travel platform. Migrated the application from JavaScript to TypeScript, improving type safety and maintainability across the codebase.