Federico P

Lead Backend Engineer

Hydranet DAO • Tiempo completo

Feb 2022 - Present • 4 yrs 8 mos

Cross-chain wallet and DEX built on payment channels. On mainnet since September 2026, after a year on testnet. - Owned the backend end to end, designing and building nearly all of it: protocol, smart contracts, nodes, storage, networking, APIs and data infrastructure - Conceived and designed the Lithium Protocol, a Lightning-style payment-channel protocol for Ethereum and EVM chains. Wrote the Solidity channel contract and the full Rust node: wallet, chain tracking, external signer, graph-based pathfinding, onion routing - Built the off-chain state store with atomic, transactional operations over pluggable backends (fjall, redb, RocksDB, SQLite, IndexedDB, localStorage) - Implemented peer-to-peer messaging on libp2p with a custom Protobuf protocol (request-response and gossip) - Made the node multi-platform: native on desktop and servers across architectures, and compiled to WebAssembly to run the full app (wallet, Lightning and Lithium nodes) entirely in the browser - Implemented cross-chain atomic swaps secured by HTLCs between Lightning and Lithium channels - Built the orderbook and backend services: gRPC / gRPC-Web, WebSocket, REST and JSON-RPC APIs on redb, PostgreSQL, Redpanda, ClickHouse and ScyllaDB - Built a subgraph indexer exposing on-chain data through a GraphQL API - Deployed and operated the services on Kubernetes (Docker, Helm charts), with CI/CD pipelines and Prometheus / Grafana monitoring - Onboarded and mentored a newly hired backend developer