Description

Design and develop VoIP services for ONT and home devices.

Responsibilities

• Design and implement VoIP service features for ONT and home devices.
• Own the full development lifecycle, including unit and functional testing.
• Debug and fix software defects to maintain service stability.
• Support and maintain existing voice service implementations.

Required Skills

• 5+ years of experience in C and C++ development within multi-process and multi-threaded environments.
• Deep understanding of VoIP protocols including SIP/H248, T38, SIP over TCP, and VoLTE.
• Experience with voice quality, QoS, DSP, voice codecs, RTP/RTCP, and RFC2833.
• Proficiency with management protocols such as OMCI and TR098/TR104.
• Knowledge of RJ11 and Z-interface specifications.
• Hands-on experience with debugging tools including SIPp, Wireshark, Valgrind, and GDB.
• Understanding of SoC architectures (32-bit and 64-bit) and associated toolchains.
• Strong grasp of Linux, IPC techniques, user space, and kernel space.
• Working knowledge of IPv4/IPv6 addressing, TCP/IP, and L2/L3 routing.

Preferred Skills

• Experience working with GPON technologies.

Key Skills

Education

Any Graduate