Aaron Zauner
Founder & Lead Engineer R&D at Second Order Harmonics [2f]
Vienna, Austria
Summary
🤩
Rockstar🎓
Top SchoolAaron Zauner is an experienced engineer and founder with roughly 14–20 years in systems, networking and security, specializing in designing, tuning and operating large-scale distributed and HPC infrastructures. He runs lambda: resilient.systems, providing hands-on consulting and R&D across distributed systems architecture, cluster automation, cryptography engineering and incident-forensics, and has repeatedly moved theory into production for datacenter- and ISP-scale environments. A frequent contributor to open-source security tooling, his work includes meaningful contributions to Certbot and the widely referenced BetterCrypto hardening guidance, and he co-authored peer-reviewed research on TLS security and email ecosystem measurements. Comfortable both in deep implementation detail and in standards/working-group settings (IETF/IRTF), he pairs protocol-level expertise with practical automation and deployment experience. He also brings an unusual blend of technical craft and creative practice—running a pro-audio engineering venture—so he’s as likely to prototype hardware or custom PCBs as to design resilient network fabrics. Based in Vienna, he values collaboration and public outreach, with talks and publications archived across slideshare, GitHub and Google Scholar.
14 years of coding experience
13 years of employment as a software developer
High School, emphasis on fine arts., High School, emphasis on fine arts. at Oberstufenrealgymnasium, Borg20, 1200 Wien
Github Skills (23)
ss10
ssl10
tls1210
python10
post10
guideline10
configuration-management10
sslv310
acme10
tls1310
mtls10
certificate10
cryptography10
postfix-notation10
libtls10
Programming languages (18)
Github contributions (5)
BetterCrypto/Applied-Crypto-Hardening
Nov 2013 - Sep 2021
Best Current Practices regarding secure online communication and configuration of services using cryptography.
Role in this project:
Security Engineer
Security EngineerContributions:3 reviews, 280 commits, 50 PRs in 7 years 11 months
Contributions summary:Aaron primarily contributed to the project by modifying configuration files and code related to secure communication protocols and services, particularly focusing on Postfix and Prosody. Their changes included strengthening security settings, adjusting TLS configurations, and removing potentially insecure options like TLSv1. The user also integrated changes from other contributors, adding to the project's overall hardening efforts. Furthermore, they updated LaTeX presentation themes, contributing to documentation and outreach on security topics.
securecryptographysecuritycommunicationapplied-cryptography
certbot/certbot
Jan 2015 - May 2016
Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.
Role in this project:Backend Engineer
Backend EngineerContributions:1 comment, 2 issues in 1 year 3 months
Contributions summary:Aaron primarily focused on enhancing the `letsencrypt-postfix` plugin, specifically related to Postfix configuration. Their contributions involved refactoring the project structure, adding version checks, and documenting features. A key part of their work involved ensuring secure email transmission by disabling outdated SSL/TLS versions within the Postfix configuration.
actletsencryptpythonsslcertbot
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