Konstantin Fastov

Senior backend engineer working in Rust and Go on trading systems, exchange integrations, and blockchain data infrastructure.

I build production systems around streaming market data, execution safety, protocol integrations, indexing, and operational reliability. I am open to full-time remote senior roles.

Selected work

• tgcli — an installable Telegram CLI with a local archive, background service, machine-readable output, and optional MCP server.
• World ID state bridge for Linea — contracts, relay service, deployments, tests, and audit remediation.
• Hyperliquid Rust SDK contributions — four merged fixes and extensions: #133 for null-safe live payloads, #134 for fill-response fields, #137 for active-asset data, and #141 for the stable CI toolchain.
• Sway compiler diagnostics — parser recognition, structured diagnostics, actionable suggestions, and tests; merged upstream.
• starknet.js SNIP-9 outside execution — account APIs, dual-version hashing, tests, and documentation; merged upstream.
• Starknet Foundry numeric multicall inputs — typed parsing, tests, documentation, and changelog updates; merged upstream.

My private production work includes Rust trading infrastructure and Rust/Go blockchain indexing systems.

Core stack

Rust · Go · TypeScript/Node.js · PostgreSQL · FoundationDB · Redis · gRPC · Protocol Buffers · JSON-RPC · WebSocket · Linux

Contact

Open to full-time remote roles

Portfolio · Email · Telegram · LinkedIn