Stefan-cristian Mititelu
Voip Engineer at IDT Corporation
Bucharest, Romania
Summary
🤩
Rockstar🎓
Top SchoolStefan-cristian Mititelu is a VoIP engineer with 11 years of experience building and hardening real-time communications systems, currently working at IDT Corporation from Bucharest. He combines low-level networking and embedded experience with backend development, contributing upstream to prominent open-source projects like Kamailio and Sipwise’s rtpengine to improve stability, memory safety and async robustness. His background spans carrier-grade SIP servers, media proxy internals and automated SIP testing, reflecting a strong operational focus on reliability at scale. Stefan-cristian holds advanced computer science degrees from Politehnica University of Bucharest and has a track record of diagnosing elusive issues such as Redis-related crashes and Valgrind-detected memory leaks—skills that make him effective at preventing production incidents.
11 years of coding experience
10 years of employment as a software developer
POLITEHNICA București National University for Science and TechnologyMaster's degree, Computer Science, Master's degree, Computer Science at Universitatea „Politehnica” din București
Romanian, English, German
Github Skills (16)
telephony10
c1710
sips10
sipjs10
c1110
cprogramming-language10
sipp10
back-end-development10
voip10
redis10
sip10
networking9
concurrency9
glib8
testing7
Programming languages (6)
Github contributions (5)
kamailio/kamailio
Nov 2015 - Sep 2022
Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms -
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 reviews, 66 commits, 109 PRs in 6 years 10 months
Contributions summary:Stefan-cristian primarily contributes to the Kamailio SIP server, focusing on backend functionality. Their commits include fixing issues related to text processing and implementing new features for the rtpengine module. Furthermore, they have reorganized and added new RPC commands for the carrierroute module, which demonstrates a focus on server-side logic and API enhancements. The user also addresses minor bug fixes and enhancements across different modules.
voltesip-serverkamailiofreeswitchchat
sipwise/rtpengine
Feb 2020 - Jan 2023
The Sipwise media proxy for Kamailio
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 27 commits, 62 PRs in 3 years
Contributions summary:Stefan-cristian focused on improving the stability and functionality of the `rtpengine` project, which is a media proxy. Their contributions involved fixing a crash related to Redis connection issues and adding a new feature with drop-traffic flags. Further work included resolving memory leaks identified by Valgrind, addressing configuration-related issues, and improving the robustness of the system through async operations and code cleanup. These changes collectively aimed to improve the reliability and performance of the media proxy.
proxykamailiofreeswitchmedia-proxyvideo
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