About this role
Senior Software Engineer – Core VoIP / SIP Backbone at Practice by Numbers. Location: Bellevue, Washington, United States. Role: designing backbone, building services, operating telephony Requirements: 7+ years software development with 4+ years on large-scale VoIP/SIP systems; strong Golang; experience with Kamailio/OpenSIPS and FreeSWITCH/Asterisk; Linux, networking, packet-level debugging, and integration with databases/backends. Category: Software Development Seniority: Senior Level Tools: Golang, Kamailio, OpenSIPS, FreeSWITCH, Asterisk, SIP, RTP, SDP, TLS, SRTP, tcpdump, Wireshark, PostgreSQL, MariaDB, MySQL, Kubernetes, AWS, GCP, WebRTC, SIP over WebSockets Commitment: Full Time Workplace: Hybrid Languages: English