Staff Software Engineer

Навыки

• ASR / TTS
• Code review
• Kubernetes
• Лидерство
• Нагрузочное тестирование
• Lua
• Мониторинг и observability

О компании и продукте

• We are looking for Staff Software Engineer to set the technical direction for telecommunications platform

Задачи

• Join Our Back-end Engineering Team!
• 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

Требования

• 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
• It will be a plus
• WebRTC at scale (ICE, TURN, media servers)
• RTPengine, Jitsi, mediasoup
• Low-latency AI voice pipelines (streaming ASR/TTS, barge-in)
• STIR/SHAKEN, robocall mitigation

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