Hoàn Hữu
Lead Developer at jambonz
Ho Chi Minh City, Vietnam
Summary
👤
Senior🎓
Top SchoolHoàn Hữu is a Lead Developer with over 10 years' experience designing and operating cloud-native, distributed systems and telecom platforms. He combines deep Java and Spring Boot expertise with infrastructure-as-code (Ansible, Terraform), Docker, and AWS services to deliver resilient microservices and streaming data solutions. His telecom background includes SIP, XMPP, SMPP and practical contributions to the RestComm SIP Servlets project where he fixed SIP header parameter handling and improved test coverage. Comfortable across DevOps and backend domains, he has led teams at jambonz after senior engineering roles at Mavenir and TeleStax, bridging protocol-level telecom knowledge with scalable cloud deployments. Known for working effectively under tight deadlines, he often surfaces edge-case protocol fixes that improve interoperability in real-world SIP deployments.
10 years of coding experience
10 years of employment as a software developer
Bachelor's degree, Automation Engineer Technology/Technician, Bachelor's degree, Automation Engineer Technology/Technician at Ho Chi Minh City University of Technology
English, Vietnamese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (10)
servlet10
javas10
sips10
sipjs10
sipp10
java10
sip10
tomcat9
test-automation8
junit7
Programming languages (1)
Github contributions (5)
RestComm/sip-servlets
May 2016 - Sep 2017
Leading SIP - IMS - WebRTC Application Server
Role in this project:
Back-end Developer
Back-end DeveloperContributions:16 commits, 15 PRs, 3 pushes in 1 year 4 months
Contributions summary:Hoàn's contributions primarily focus on refining the Restcomm SIP servlets project, specifically addressing issues related to parameter handling within SIP headers and improving overall functionality. They fixed bugs, updated existing code based on external reviews, and adjusted the parameter quoting logic in various SIP header implementations to ensure proper behavior according to specifications. The user also updated the test suite and related contexts.
kamailiofreeswitchwebtransportwebrtcwebsocket
xhoaluu/xhoaluu
May 2016 - Jul 2017
Contributions:2 pushes, 1 branch in 1 year 2 months
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