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Who We Are
CozmoX AI is building the world's most advanced
AI Employees agents that talk, think, and act. From powering collections to sales and customer support, our AI runs autonomously in the real world, on real calls, at scale.
We’re on track to become the #1 in this category
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What We’re Looking For
We're hiring a
Principal Software Engineer who is a
do-er, a builder, and a systems thinker — someone who has previously
architected and scaled high-throughput
enterprise developer platforms (e.g., Twilio, Postman, Segment, Stripe).
This role is
critical to building the infra-first backbone of our real-time voice engine, developer tooling, and next-gen orchestration platform. You will be hands-on and deeply involved in
everything from code to system design to product vision.
✅
What You’ll Do
- Architect, build, and scale real-time systems for telephony, WebRTC, audio streaming, and AI orchestration
- Design developer-facing infrastructure and APIs that are robust, scalable, and intuitive
- Collaborate directly with founders on platform vision, core architecture, and GTM alignment
- Own performance, latency, reliability, and compliance across voice infrastructure
- Work across cloud, on-prem, and hybrid environments — banking-level security and scalability
- Lead and mentor a high-caliber team of backend and infra engineers
🛠️
Tech Stack You’ll Work With
- Languages: Go, Rust, TypeScript, Python
- Infra: AWS, GCP, DigitalOcean, Kubernetes, Pulumi, Fly.io
- Voice & Media: SIP, RTP, WebRTC, Livekit, Janus, Twilio
- LLMs: OpenAI, Fine-tuned local models (vLLM, SNAC, Whisper)
- Eventing & Workflow: Temporal, NATS, RabbitMQ
- Security & Compliance: SOC 2, GDPR, HIPAA-focused infrastructure
What We’re Looking For
- BONUS (immediate shortlisting): if you are certified in CKA or CKS
- 8+ years of hands-on backend or infra experience
- Previously built or scaled developer platforms (SDKs, APIs, real-time infra)
- Deep understanding of WebRTC, telephony, or media streaming systems
- Comfortable with distributed systems, concurrency, and large-scale event-driven architecture
- Systems-level thinker who cares about execution, speed, and impact
- Strong product sense — you care about what you're building, not just how
- Based in (or willing to relocate to) Bangalore or San Francisco for in-person work
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Why Join Us
- Founders who are builders hands-on, fast, and obsessed with quality
- A team that moves fast, avoids meetings, and ships daily
- Backed by top-tier investors like Y Combinator
- Real revenue, real scale, real impact , no fluff
