Dominik Zajkowski
Technical Architect at Shielded Technologies
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolDominik Zajkowski is a Technical Architect with 11 years of experience designing and implementing resilient, production-grade systems across blockchain, fintech, and enterprise domains. He blends pragmatic engineering—favoring code, thorough tests and frequent releases—with a focus on compact, efficient data structures, evidenced by contributions to the RChain blockchain core (trie tests and in-memory store refactors). A former technical manager and architect at IOHK and now at Shielded Technologies, he routinely moves between hands-on Scala/FP development and higher-level system design. Based in Warsaw, he favors practical, low-bureaucracy workflows and brings a track record of modernizing storage and concurrent execution layers in complex distributed platforms.
11 years of coding experience
15 years of employment as a software developer
Master of Science (MSc), Computer Science, Master of Science (MSc), Computer Science at Wrocław University of Science and Technology
English
Github Skills (5)
data-structures10
data-structure10
blockchain10
scala9
testing8
Programming languages (7)
Github contributions (5)
rchain/rchain
May 2018 - Oct 2019
Blockchain (smart contract) platform using CBC-Casper proof of stake + Rholang for concurrent execution.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:487 commits, 235 PRs, 45 pushes in 1 year 4 months
Contributions summary:Dominik primarily focused on the back-end development of the RChain blockchain platform. Their work involved replacing serialization hacks in the in-memory store, introducing and implementing tests for a trie structure, and refactoring the in-memory store for a more compact data representation aligned with the LMDBStore. These changes focused on improving data structures and operations related to the core functionality of the blockchain.
rholangsmart-contractstakeethereumproof-of-stake
dzajkowski/dzajkowski.github.io
Jan 2015 - Feb 2020
Contributions:25 pushes, 2 branches in 5 years 2 months
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