Golang Developer
Senior Software Engineer · Blockchain & Backend Developer
Full-stack Web3 engineer with 7+ years building production-grade blockchain infrastructure and smart contracts. Deep expertise across the EVM ecosystem (Solidity, Foundry, OpenZeppelin) and high-throughput Go backends — from Access Node gRPC APIs on Flow mainnet to cross-chain messaging via Wormhole and Chainlink CCIP. Track record of delivering protocol-level features, DeFi vault architectures, and security-focused contract design in fast-moving, distributed teams.
Experience: 5 years
Yearly salary: $88,000
Hourly rate: $55
Nationality: 🇺🇦 Ukraine
Residency: 🇺🇦 Ukraine
Experience
Go Developer — Blockchain Protocol Engineer
Flow Network (Blockchain Partner) 2022 - 2026
Designed and maintained REST and gRPC API endpoints for Flow Access Nodes, supporting reliable data access across mainnet validator infrastructure. Led the protocol-level implementation of immutability for core Flow data structures, improving network security and auditability. Built a real-time observer system to collect and expose on-chain metrics for the FlowCreditMarket DeFi protocol, enabling data-driven protocol governance. Maintained >90% test coverage across critical subsystems through comprehensive unit and integration test suites.
Solidity Developer (Contract)
Folks Finance 2022 - 2025
Developed and audited Solidity smart contracts for cross-chain token and message passing using Wormhole GMP and Chainlink CCIP across 5+ EVM-compatible chains. Reduced contract deployment and testing cycle time by building fully automated Foundry/Forge scripts with TypeScript integration harnesses. Integrated OpenZeppelin security standards and evaluated emerging cross-chain protocols to mitigate bridge-related attack vectors.
Blockchain Engineer
K.R.O.K 2021 - 2022
Developed a Domain Name Service (DNS) smart contract on the Elrond blockchain in Rust. Implemented DeFi vault contracts on Solana (Top-100 CMC protocol) — LP/stablecoin vaults, borrow/liquidation logic, and yield strategies.
Blockchain Engineer
Stakenet.io 2017 - 2021
Contributed to full-cycle development of the XSN native cryptocurrency — consensus layer, chain features, and Lightning Network integration. Built a cross-platform light wallet in Qt Quick and implemented JSON REST API clients for Dash-based network interaction.
C++ / Qt Software Engineer
Acmon · Metmon · Keen Safety 2015 - 2017
Developed embedded device communication software (serial + REST) and iOS/Android mobile apps using Qt Quick.
Skills
crypto
defi
golang
protocol-engineer
smart-contract
solana
solidity
english