Steven Roose
Co-founder & CEO at Second
Lisbon, Lisbon, Portugal
Summary
🤩
Rockstar🎓
Top SchoolSteven Roose is a blockchain-focused engineer and entrepreneur with 13 years of experience, currently co-founder and CEO of Second in Lisbon. He spent five years as a core engineer at Blockstream and is a prolific open-source contributor to flagship projects like Bitcoin Core, btcd, rust-bitcoin, and go-ethereum, often improving testing, serialization, and crypto primitives. His work spans low-level protocol changes (confidential assets and PSBT handling in Elements), Rust crypto bindings, and Bitcoin node behavior, showing both deep protocol knowledge and pragmatic infrastructure skills. Steven combines hands-on C++, Go, and Rust development with QA/test automation expertise, and he routinely publishes code and tooling so others can reuse and inspect it. Colleagues describe him as a cypherpunk-minded engineer who prefers auditable, well-documented solutions—a trait reflected in his frequent documentation and CI improvements.
13 years of coding experience
4 years of employment as a software developer
Master of Engineering - MEng, Computer Science, Master of Engineering - MEng, Computer Science at KU LeuvenSint-Jan Berchmanscollege Westmalle
Stackoverflow
2,749reputation
162kreached
9answers
40questions
Github Skills (51)
json-rpc10
dependency-management10
min10
test-automation-framework10
c-language10
autotest-framework10
apidoc10
python10
testing10
configuration-management10
command-line-interface10
bitcoin10
test-framework10
data-serialization10
bitcoins10
Programming languages (38)
Github contributions (5)
rust-bitcoin/rust-bitcoincore-rpc
Sep 2018 - Sep 2022
Rust RPC client library for the Bitcoin Core JSON-RPC API.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:61 reviews, 327 commits, 199 PRs in 4 years 1 month
Contributions summary:Steven primarily focused on implementing new commands and modifying existing ones for the Bitcoin Core JSON-RPC API client library. They introduced the `gettxout` command, made modifications to the `signrawtransaction` function, and incorporated additional commands for retrieving blockchain information. The user also updated dependencies and made improvements to the structure of the library.
apirpcrpc-clientrustclient-library
ElementsProject/elements
Apr 2018 - Nov 2022
Open Source implementation of advanced blockchain features extending the Bitcoin protocol
Role in this project:Back-end Developer
Back-end DeveloperContributions:12 releases, 21 reviews, 464 commits in 4 years 8 months
Contributions summary:Steven contributed to the implementation of core features within the Elements project, focusing on adding support for confidential assets. They introduced new data structures such as `CAsset`, `CAmountMap`, and `CConfidentialCommitment` to represent asset-related information. Furthermore, the user modified and implemented various RPC methods for processing and validating assets, including `getnewaddress`, `createrawtransaction` and `claimpegin`. Their work included extensive changes related to P2P messaging and the handling of PSBTs, especially concerning the correct serialization and de-serialization of transactions with confidential assets, and adding testing infrastructure for the same.
zcashblockchainblockchain-networkcryptocurrencybitcoin
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