Founding Engineer ($160k-$200k + Equity) at TransVoix

TransVoix is a high-growth voice infrastructure platform building real-time multilingual translation that preserves vocal identity. After generating massive interest at CCW Vegas 2026 from industry leaders like Sinch and Five9, TransVoix is scaling its carrier-grade audio pipeline and launching a public SDK for global enterprise developers.

About the role

As the first engineering hire at TransVoix, you will architect and scale a real-time audio pipeline serving enterprise contact centers and AI voice agents. You’ll own the transition to AWS, harden multi-tenant security, and design the versioned SDK that global developers will depend on for years.

Location: Phoenix, USA

Why this role is remarkable

• Incredible market pull: Major industry players including Sinch and Five9 are already requesting demos and SDK access following a breakout showing at CCW Vegas 2026.
• High-stakes ownership: You are the founding engineer with a clear path to CTO, owning everything from sub-second latency audio pipelines to the cryptographic voice provenance infrastructure.
• Advanced tech stack: Work with a sophisticated async Python/FastAPI backend and real-time audio components that outperform standard solutions, maintaining speaker identity across bidirectional translation.

Responsibilities

• Design and maintain the core voice pipeline ensuring sub-second latency and high-fidelity vocal cloning across 15+ languages using STT, translation, and TTS.
• Architect the public-facing developer SDK and sandbox environment, establishing the permanent API contracts that enterprise customers will use to integrate TransVoix capabilities.
• Lead the infrastructure migration to AWS using Terraform while implementing C2PA cryptographic provenance and SOC 2-ready multi-tenant security patterns across the platform.

Requirements

• Deep production experience building carrier-grade voice pipelines, specifically handling WebRTC, WebSocket audio framing, and low-latency jitter management at an infrastructure-grade scale.
• Mastery of asynchronous Python (FastAPI/asyncio) and React/TypeScript, with a history of shipping stable, versioned APIs or SDKs for external developer consumption.
• Architectural mindset focused on multi-tenant security and Infrastructure as Code, capable of leading build-vs-buy decisions for self-hosted model inference and GPU infrastructure.

Pay

$160k–$200k + equity