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Principal Software Engineer - Real-Time Voice

Parloa· Engineering
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Berlinfull-timePosted 1w ago

About the role

Leadership role owning the technical direction of Parloa's real-time voice infrastructure, driving architecture, low-latency and scalable voice systems, and collaboration with AI/ML, product, and infrastructure teams.

Responsibilities

  • Own the architecture and technical roadmap for Parloa's Voice/VoIP infrastructure, including SIP trunking, media handling, and real-time audio pipelines
  • Design for low-latency, high-availability voice at enterprise scale — across global telephony carriers and providers
  • Drive technical decisions on protocols and standards (SIP, SDP, RTP/SRTP, RTCP, WebRTC, ICE, STUN/TURN) and real-time media transport
  • Partner with AI/ML teams to optimise the integration between voice infrastructure and conversational AI models (ASR, TTS, turn-taking, barge-in)
  • Diagnose and resolve deep, systemic issues in call quality, latency, jitter, and packet loss across distributed, multi-region deployments
  • Define and uphold engineering standards for reliability, observability, and security across the voice stack
  • Mentor senior and staff engineers, acting as a technical multiplier across the organisation
  • Evaluate and integrate with telephony providers, carriers, and SIP trunk vendors as Parloa expands into new markets
  • Represent Parloa's technical voice expertise in conversations with enterprise customers and partners where needed

Qualifications

  • 10+ years of engineering experience, including 5+ years hands-on building, operating, or debugging production Voice/VoIP, SIP, WebRTC, or carrier-grade voice infrastructure
  • Strong knowledge of SIP, SDP, RTP/SRTP, RTCP, WebRTC, ICE, and real-time media transport protocols
  • Hands-on understanding of audio codecs and media behavior, including Opus, G.711/G.722, codec negotiation/transcoding, DTMF/RFC2833, jitter buffers, packetization, and codec-related quality/latency trade-offs
  • Experience building or operating large-scale, distributed, real-time systems with strict latency and availability requirements
  • A track record of owning architecture for complex systems and driving technical decisions with broad organisational impact
  • Experience working with telephony carriers, SIP trunk providers, or PSTN integrations at scale
  • Deep, hands-on ownership of production SIP-based voice infrastructure at enterprise scale (e.g. Kamailio, FreeSWITCH, Asterisk, pjsip)
  • Strong systems programming skills in Go, C, C++ or Rust, with the ability to work at the media/transport layer
  • Comfort operating in cloud environments (AWS, GCP, or Azure) and with container orchestration (Kubernetes)
  • Excellent communication skills — able to explain complex technical trade-offs to engineers and non-engineers alike
  • A genuine interest in AI and conversational technology, and how voice infrastructure underpins it
  • Experience instrumenting and operating voice-quality observability — call-quality metrics (e.g. MOS), per-leg call tracing, and diagnosing jitter, latency, and packet loss from telemetry

Skills

Required:Architecture leadershipSIP, SDP, RTP/SRTP, RTCP, WebRTCAudio codecs (Opus, G.711, G.722)Go, C, C++, or RustCloud and Kubernetes

Benefits

  • Competitive compensation package
  • Opportunity to influence enterprise-scale voice infrastructure
  • Collaborative, fast-paced engineering culture
  • Exposure to AI/ML integration with voice systems
  • GDPR and ISO compliance-focused environment
Last updated Oct 15, 2026. Interested? Apply on the company site.
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