Blockchain engineer with 4+ years in Web3 infrastructure. Based in Rio de Janeiro, Brazil.

Senior experience in backend development, worked in high throughput data engineering pipelines before migrating to Web3 development in early 2022 . Most recently at Moonsong Labs, I co-developed SNOS (Starknet Operating System) – achieved 40% performance improvement in block execution. Previously at Cartesi, built a resilient node, with blockchain indexing handling 10,000+ transactions/hour and reduced indexing failures by 85% during chain reorgs.

Core expertise: Rust, Go, Python | ZK rollups, optimistic rollups, consensus algorithms | Ethereum, Starknet, Substrate

Seeking: Senior blockchain engineering roles at protocols and infrastructure companies. Remote-first, open to full-time or long-term contracts. Ready to contribute to L1/L2 scaling, ZK systems, or cross-chain infrastructure.

Master's in Computer Science (PUC-Rio) focused on neural network optimization and techniques.

GitHub: github.com/GMKrieger | LinkedIn: linkedin.com/in/------------a13621102