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About the Role

As Principal Software Engineer for Voice/VoIP, you will own the technical direction of our real-time voice infrastructure, enabling AI agents to conduct natural, low-latency phone conversations at enterprise scale across various providers and markets. This hands-on technical leadership role involves setting architectural direction, solving complex problems, and elevating the engineering organization's approach to voice systems. You will collaborate with infrastructure, AI/ML, and product teams to ensure the voice stack is fast, reliable, and globally scalable.

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 optimize 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 organization.
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.

Requirements

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 organizational 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 one or more of 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

Voice/VoIP
SIP
WebRTC
Carrier-grade voice infrastructure
SDP
RTP/SRTP
RTCP
ICE
Real-time media transport protocols
Audio codecs
Opus
G.711/G.722
DTMF/RFC2833
Jitter buffers
Packetization
Go
C
C++
Rust
Cloud environments (AWS, GCP, or Azure)
Kubernetes
Observability
Call-quality metrics (MOS)
Per-leg call tracing

Experience Level

10+ years of engineering experience
5+ years hands-on building, operating, or debugging production Voice/VoIP, SIP, WebRTC, or carrier-grade voice infrastructure

About the Company

Parloa's mission is to make every customer conversation feel effortless for both customers and the companies serving them.
Parloans are shaping the foundation of a new era in customer experience, one where customer support is no longer transactions, but meaningful exchanges.
Parloa has powered over ONE BILLION interactions between global enterprise brands and their customers, with companies like Booking.com, HealthEquity, Allianz, SAP, BarmeniaGothaer, and TUI already deploying Parloa at scale.
We’re building agentic AI that enterprises trust with their most important customer moments: complex questions, high volumes, real stakes.
When millions of people reach out to a brand, those interactions aren’t just support tickets; they’re defining experiences.
We’re here to raise the standard: making every conversation seamless, intelligent, and genuinely helpful.
At Parloa, ownership isn’t a buzzword; it means being accountable for outcomes, not just tasks.
We operate in a category that’s evolving fast, where the bar is high, and the problems are complex.
We hire people who think in solutions, communicate with clarity, and follow through.
We’ve kept the intensity: fast execution, direct feedback, and a strong expectation to contribute meaningfully from day one.
Backed by leading global investors like General Catalyst, EQT Ventures, and Altimeter Capital, we’re scaling with a clear ambition: to become the global category leader in enterprise-grade conversational AI.
Parloa is committed to upholding the highest data protection standards for our clients' and employees' data.
All our employees are instrumental in ensuring the utmost care, GDPR, and ISO compliance, including ISO 27001, in handling sensitive information.
Parloa is an e-verify employer in the USA.

Equal Opportunity

We provide equal opportunities to all qualified applicants regardless race, gender, sexual orientation, age, religion, national origin, disability status, socioeconomic background and other characteristics.