Backend and systems engineer with 15 years in the field, 7 of those as tech lead or architect. Recent work is mostly Rust on distributed systems that have to hold up against untrustworthy peers, tight compute budgets, or both. Spent the last two years at Eiger building blockchain infrastructure across off-chain services and on-chain programs. Before that, seven years at a consultancy leading backend teams on distributed cloud projects. Comfortable owning a service end to end, from design through production incident response. Also teaches Rust part-time at Metana, and builds in-house AI-assisted development tooling on the side.
Experience: 5 years
Yearly salary: $150,000
Hourly rate: $100
Nationality: 🇺🇦 Ukraine
Residency: 🇵🇹 Portugal
Experience
Rust Web3 Protocol Engineer
Eiger 2024 - 2026
Cross-chain verification and message-passing infrastructure Built protocol-level infrastructure for moving tokens between different blockchain runtimes. Shipped to production as part of Skip:Go. • Made signature verification and state proofs fit inside hard compute limits — covered Cosmos Hub's full validator set plus Noble and Celestia • Wrote a Tendermint light client that verifies a Cosmos chain's validators from inside a Solana program; handles 100+ validators within a fixed compute budget • Designed the message-passing layer: deterministic ordering, replay protection, working across EVM, SVM, and Cosmos • Wrote the design documents for the multi-program architecture and ran the design reviews • Rebuilt the cross-chain relayer from scratch; pulled the core out into an open-source library (eigerco/axelar-relayer-core) • Built the Starknet integration (eigerco/giza-axelar-starknet) and the modular structure that made later integrations quick • Passed external security audit; handled the issue triage and fixes end to end • Integrated with the Solidity-side contracts (cosmos/solidity-ibc-eureka) on the Ethereum end
Director of Technology / Principal Engineer
DOOR3 2017 - 2024
Technology consultancy. Progressive roles from Senior Engineer to Director of Technology over 7 years. Led architecture and delivery for distributed cloud systems (Node.js, Rust, .NET). Built DevOps practices organization-wide; led DevOps department. Initiated Rust adoption: rewrote CAD system core to WebAssembly for structural engineering software. Managed engineering teams, conducted hiring, defined technical vision. Presales: technical audits, solution design, resource planning.
Senior Software Engineer
Infopulse 2014 - 2017
Full-stack development on enterprise projects. Built distributed change tracking for high-load products (Big Four client). Led frontend architecture (Angular.js). Created custom testing frameworks under restrictive OSS policies.
Software Engineer
Materialise 2012 - 2014
Additive manufacturing software (Streamics, Magics). Full-feature development: WPF desktop, ASP.NET MVC/WCF backend, C++ integration. Pioneered unit testing for web frontend with CI/CD integration.
Skills
aws
docker
gcp
golang
python
solana
solidity
terraform
typescript
rust
english
russian
ukrainian
