Sergey Melnychuk
Owner at SERGMELN.SOFTWARE
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolSergey Melnychuk is a seasoned software engineer and founder with 11 years of experience building high-performance distributed systems, functional-style backends, and applied machine learning solutions. Based in Warsaw, he has deep Rust and Web3 expertise from leading and maintaining Starknet projects (including work on a Rust Starknet full node and a Starknet light client), alongside production experience at Meta, Google, and major data infrastructure firms. He combines systems-level rigor—refactoring core data structures and extending RPC APIs—with practical big-data and IoT platform delivery in Scala, Java, and cloud-native stacks. As owner of SERGMELN.SOFTWARE he pairs hands-on engineering with continual self-improvement, favoring correctness and efficiency in design. Colleagues describe him as a pragmatic engineer who moves fluidly between low-level performance work and high-level distributed architecture.
11 years of coding experience
17 years of employment as a software developer
Igor Sikorsky Kyiv Polytechnic Institute
English, Ukrainian, Russian, Polish
Github Skills (9)
starknet10
rust10
api10
merkle-tree10
apidoc10
database9
database-api9
rpc9
databases9
Programming languages (10)
Github contributions (5)
eqlabs/pathfinder
Sep 2022 - Jan 2023
A Starknet full node written in Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 260 reviews, 45 commits in 4 months
Contributions summary:Sergey primarily refactored the `MerkleTree` implementation, changing the `get` method to return an `Option` and updating related tests, suggesting a focus on data structure efficiency and correctness. They also added and modified RPC methods, including `getBlockTransactionCount`, `blockHashAndNumber`, and `addDeployAccountTransaction`, indicating contributions to the API layer. These changes highlight the user's work on core functionalities and API interactions within the Starknet full node.
rustfull-nodeblockchainstarknet
sergey-melnychuk/mio-websocket-server
Jul 2019 - Jun 2021
Implementation of websocket server with mio and parser combinators
Contributions:41 commits, 8 PRs, 25 pushes in 1 year 11 months
websocketswebsocket-serverwebsocketparser-combinatorsmio
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