Nils Ohlmeier
Principal System Engineer at IETF
Denver, Colorado, United States
Summary
🤩
Rockstar🎓
Top SchoolNils Ohlmeier is a Principal System Engineer with 23 years of deep expertise in real-time communication, specializing in WebRTC, VoIP (SIP) and secure RTP. He blends low-level embedded and protocol work with cloud-scale system design, having led engineering teams at Mozilla and contributed to major open-source projects like Jitsi and libsrtp to harden security and stability. As an IETF working group chair and long-time standards participant he uniquely bridges protocol standardization, interoperability testing, and product engineering. Currently at Cloudflare driving the Calls product, he’s known for fixing subtle cross-browser ICE/DTLS issues and improving media device handling—skills honed by frequent on-site customer support and global collaboration. Technically versatile and standards-minded, he brings a pragmatic, systems-level view to shipping resilient real-time communication services.
23 years of coding experience
22 years of employment as a software developer
Diploma (=Master) Computer Science, Diploma (=Master) Computer Science at Technische Universität Berlin
German, English
Stackoverflow
1,141reputation
41kreached
17answers
0questions
firefox
top-5%
webrtc
top-1%
Github Skills (33)
kotlin10
jitsi10
xmpp10
javascript10
video-conferencing10
jitsi-meet10
sdp10
c1110
srtp10
c1710
security10
firefox10
cryptography10
dtls10
webrtc10
Programming languages (16)
Github contributions (5)
cisco/libsrtp
Nov 2017 - Dec 2020
Library for SRTP (Secure Realtime Transport Protocol)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 reviews, 18 commits, 12 PRs in 3 years 1 month
Contributions summary:Nils primarily focused on enhancing the security and stability of the SRTP library. Their contributions included fixing compiler warnings, addressing review comments, and adding error handling for platform detection. They also made improvements by making read-only arrays constant and refining the test suites. Additionally, the user addressed GCM IV logging and other code formatting improvements.
securerealtimelibsrtprtpsrtp
jitsi/lib-jitsi-meet
Aug 2021 - Jul 2022
A low-level JS video API that allows adding a completely custom video experience to web apps.
Role in this project:Back-end Developer
Back-end DeveloperContributions:19 reviews, 15 commits, 21 PRs in 11 months
Contributions summary:Nils primarily contributed to bug fixes and improvements related to the WebRTC video API. Their work addressed issues such as Chrome ICE connection failures, Firefox-specific RTX behavior, and SDP handling. The user also implemented updates to data channel SDP and included code adjustments to improve general system stability and reliability.
apilevel-jsjavascriptjitsivideo-conferencing
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