Marcin Jachymiak
Staff Software Engineer at Gauntlet
Nashville-Davidson, Tennessee, United States
Summary
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Rockstar🎓
Top SchoolMarcin Jachymiak is a Staff Software Engineer with 11 years of experience building backend systems and cryptography-focused software, currently leading engineering work at Gauntlet. An MIT computer science alumnus, he has deep hands-on experience in blockchain and distributed storage—having contributed profiling and performance optimizations to the notable Sia decentralized storage project. His background spans startups and research-oriented roles, from Nebulous and Flowcode to internships at Chaincode Labs and Bitcoin Optech, reflecting a strong foothold in Bitcoin and crypto infrastructure. Known for squeezing performance out of core primitives (e.g., optimizing Merkle root and transaction ID computations), he blends rigorous math and systems thinking to deliver efficient, production-grade code. Based in Nashville, he pairs technical leadership with continued interest in cryptography and algorithmic elegance.
10 years of coding experience
7 years of employment as a software developer
Reavis High SchoolBachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Massachusetts Institute of Technology
Stackoverflow
1reputation
0reached
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Github Skills (10)
go10
blockchain10
algorithms9
data-structure9
algorithm9
data-structures9
software-design8
sys8
system-design8
storage7
Programming languages (9)
Github contributions (5)
NebulousLabs/Sia
Jun 2017 - Aug 2017
Blockchain-based marketplace for file storage. Project has moved to GitLab: https://gitlab.com/NebulousLabs/Sia
Role in this project:
Back-end Developer
Back-end DeveloperContributions:37 commits, 17 PRs, 14 comments in 1 month
Contributions summary:Marcin's contributions primarily focused on enhancing the Sia blockchain-based storage project's functionality, particularly by adding and improving profiling features. They added flags to enable CPU, memory, and trace profiling. Furthermore, the user optimized the code, specifically the `Block.MerkleRoot` and `Transaction.ID()` methods, by replacing function calls with direct calls on marshaled data. Code comments were also fixed.
marketplacefile-storageblockchaingitlabdecentralized
marcinja/bitcoin
Jun 2018 - Oct 2020
Bitcoin Core integration/staging tree
Contributions:114 pushes, 29 branches in 2 years 3 months
stagingcryptocurrencybitcoin-corebitcoin
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