Staff Software Engineer

Аналитика рынка

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Описание

#вакансия #vacancy #python #senior #lookfor #remote #pd #voip Vacancy: Staff Software Engineer Company: Mad Devs Salary: 5000-6000$ gross You will own the architecture of how calls enter, route through, and leave our system: SIP signaling at the edge (Kamailio / OpenSIPS), media and call control (FreeSWITCH, Asterisk, RTPengine), the Python services that bridge voice with our AI inference pipeline, and the carrier-facing integrations underneath. What will need to do: • Own end-to-end telecom architecture: SIP edge (Kamailio/OpenSIPS), media & call control (FreeSWITCH), Python services bridging voice to AI, carrier integrations • Scale platform to 10,000+ concurrent calls with tight latency/SLOs • Design HA/disaster recovery: anycast SIP, active/active media, geographic failover • Set engineering standards for telecom team (testing, load testing, code review, on-call) • Mentor senior/mid engineers, raise technical bar • Define voice quality observability & SLOs (MOS, jitter, packet loss, latency) • Lead carrier strategy: SIP trunk vendors, redundancy, LCR, STIR/SHAKEN • Partner with AI/product to keep latency budgets honest Requirements: • 8+ years engineering, 4+ years in telecom/VoIP in production • Technical leadership: design docs, mentoring, cross-team decisions • Deep production experience with FreeSWITCH + Kamailio OR OpenSIPS (custom modules, routing scripts, at scale) • Strong SIP/RTP/SRTP/SDP/ICE; debug via pcap and SIP trace • Operated voice platform at 1,000+ concurrent calls (knows diff to 10k) • Strong Python; can work in Lua/Go/C as needed • Production integration with PSTN/SIP trunk providers (Twilio, Telnyx, etc.), DID management, LCR • Hands-on HA/failover for real-time systems • Production Kubernetes (GKE/EKS) and Terraform • Language Proficiency: English at B2-C1 level, Russian at B2 level • Location: any, except Russia and Belarus Contact: [handle]

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