Răzvan Crainea
Chief Technology Officer at OpenSIPS Solutions
Romania
Summary
🤩
Rockstar🎓
Top SchoolRăzvan Crainea is a seasoned technology leader and Chief Technology Officer with 15 years of experience building and architecting high-performance telecom software. He is a core developer and long-time senior architect for the OpenSIPS project, bringing deep expertise in SIP, RTP and real-time communications alongside strong systems programming skills in C/C++, C#, Java, and Python. Currently leading engineering at SIPhub, he combines hands-on development with strategic product direction for carrier-grade VoIP solutions. His academic background in distributed and parallel systems (Politehnica University Bucharest and VU Amsterdam) informs pragmatic designs for scalable, resilient systems. He also has a decade of teaching experience in operating systems and compilers, reflecting an ability to explain complex technical concepts and mentor engineers. Based in Romania, Răzvan is known for contributing core protocol-level improvements that power production communication platforms.
16 years of coding experience
Master’s Degree, Parallel and Distributed Computing Systems, Master’s Degree, Parallel and Distributed Computing Systems at VU University AmsterdamHigh School, Computers, Mathematics, High School, Computers, Mathematics at Alexandru Lahovari National CollegeMaster, Distributed Systems, Master, Distributed Systems at Universitatea „Politehnica” din București
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (92)
proxy10
security10
command-line-tool10
ansible-role10
opensips10
kamailio10
software-design10
statistics10
multicore10
provisioning10
call-flow10
signalwire10
cli10
sip-server10
telephony10
Programming languages (13)
Github contributions (5)
OpenSIPS/call-api
Apr 2020 - Nov 2021
Call API is a front-end layer for managing advanced SIP call flows. It listens for WebSocket connections and talks JSON-RPC 2.0 over them.
Contributions:4 reviews, 78 commits, 5 PRs in 1 year 7 months
call-flowfrontendjson-rpcsipwebsocket
OpenSIPS/sipssert-opensips-tests
Apr 2023 - Jun 2026
SIPssert tests for OpenSIPS
Contributions:20 PRs, 141 pushes, 4 branches in 3 years 2 months
opensips
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