Friedel Ziegelmayer
Chief Technology Officer at Number 0
Germany
Summary
🤩
Rockstar🎓
Top SchoolFriedel Ziegelmayer is a CTO and seasoned technology leader with 13 years of experience building and scaling distributed systems, developer tools, and crypto/peer-to-peer infrastructure from Germany. Previously a Team Lead at Protocol Labs, he has deep hands‑on expertise across Go and Rust, contributing to high-profile open-source projects like libp2p, IPFS, and rust‑crypto libraries. His track record spans backend systems, async runtimes, cryptographic primitives and frontend/devops work—comfortable moving between low-level networking, performance-sensitive Rust code and browser-based test and UI improvements. He has repeatedly modernized and refactored core components (websocket transports, async runtimes, cryptographic modules) and improved cross-language interoperability (notably Go↔JS IPFS interop). Trained as a mathematician (Diplom), he brings rigorous algorithmic thinking to practical engineering and systems design. Known for combining leadership with sustained individual contributions, he focuses on robust, testable implementations that scale in real distributed environments.
14 years of coding experience
9 years of employment as a software developer
Diplom Mathematics, Diplom Mathematics at The University of FreiburgAbitur, Abitur at Richard-Fehrenbach-Gewerbeschule Freiburg
English, German
Github Skills (121)
hugo10
multithreading10
peer-to-peer10
testing10
low-level10
databases10
ipfs10
websocket10
mio10
gruntjs10
bignum10
low-level-programming10
modular-arithmetic10
async-await10
browserify10
Programming languages (28)
Github contributions (5)
filecoin-project/rust-fil-proofs
May 2018 - Nov 2021
Proofs for Filecoin in Rust
Role in this project:
Backend Developer
Backend DeveloperContributions:259 reviews, 946 commits, 479 PRs in 3 years 6 months
Contributions summary:Friedel implemented core functionality for the Filecoin proofs within the repository, specifically focusing on the `drgraph` and `vde` modules. Their work involved developing and refactoring algorithms for creating Merkle trees, and key generation for the VDE process. The user also implemented the porep encoding algorithm. In addition the user added support for multi threaded operations in the code.
filecoinrust
RustCrypto/RSA
Jul 2018 - Apr 2022
RSA implementation in pure Rust
Role in this project:Back-end Developer
Back-end DeveloperContributions:88 reviews, 101 commits, 84 PRs in 3 years 9 months
Contributions summary:Friedel contributed to the implementation of a probabilistic prime checker within the `rsa` repository. They introduced the `prime` module, added test cases, and implemented the Miller-Rabin and Lucas primality tests. The work involved adding mathematical functions such as modular inverse and jacobi to the repository as well. They made multiple commits to enhance the testing of the implemented prime checking algorithms.
rsarust
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