Iulian Barbu
Rust Software Engineer at Parity Technologies
Bucharest, Romania
Summary
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Rockstar🎓
Top SchoolIulian Barbu is a Rust software engineer with 10 years of experience building reliable, production-grade systems across cloud, blockchain, and virtualization domains. Currently on Parity’s SDK Node team in Bucharest, he works on core Polkadot node subsystems—networking, consensus, storage and runtime execution—bringing deep systems-level Rust expertise to a project that powers a major blockchain ecosystem. He has a track record at AWS Firecracker (VMM performance tests, security fixes, and device refactors), at Shuttle rebuilding a control plane on AWS, and leading engineering on Solana smart-contracts at Maple. His open-source contributions include improving Polkadot SDK resiliency (RPC retry logic, Prometheus metrics, offchain workers) and visible work in Firecracker, demonstrating a focus on observability and robustness. Comfortable bridging product and engineering, he has led small teams, owned control-plane designs, and translated product requirements into scalable implementations. He holds a bachelor’s in Computer and Information Sciences from the Polytechnic University of Bucharest.
10 years of coding experience
6 years of employment as a software developer
Bachelor's degree, Computer and Information Sciences, General, Bachelor's degree, Computer and Information Sciences, General at Universitatea „Politehnica” din București
English, Romanian
Stackoverflow
61reputation
5kreached
1answer
8questions
Github Skills (16)
substrate10
rpc10
rust10
prometheus10
polkadot-js10
polkadot10
blockchain10
html6
hadoop-yarn6
firefox6
assembly6
hadoop6
forms6
database6
canvas6
Programming languages (10)
Github contributions (5)
paritytech/polkadot-sdk
Aug 2024 - Apr 2025
The Parity Polkadot Blockchain SDK
Role in this project:
Backend Developer
Backend DeveloperContributions:324 reviews, 61 PRs, 27 pushes in 7 months
Contributions summary:Iulian's primary contribution involves enhancing the reliability and functionality of the `cumulus/client/relay-chain-rpc-interface` module within the Polkadot SDK. They implemented retry logic for external RPC connections to improve collator stability. Furthermore, they added Prometheus metrics to the minimal node's RPC client, enabling node operators to monitor RPC call durations and call counts. The user also incorporated offchain worker functionality.
blockchaincumuluspolkadotsubstrate
iulianbarbu/firecracker
Aug 2019 - Feb 2021
Secure and fast microVMs for serverless computing.
Contributions:1291 pushes, 84 branches in 1 year 6 months
secureserverlessmicrovmscomputingserverless-computing
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