Aim AI is a bootstrapped, profitable, and scaling fast with ~$5M ARR. We build ultra-realistic voice AI agents that power real phone conversations for businesses in sales, customer service, marketing, and beyond. Our platform handles live calls end-to-end, and every millisecond counts.
We're looking for aFull-Stack Engineer to own and evolve the core backbone of our system, the infrastructure that makes calls sound seamless (or breaks if we get it wrong).
What You'll Do
- Architect and operate low-latency, high-throughput systems for live phone calls and bidirectional audio streaming
- Build backend orchestration services (primarily Node.js / TypeScript, with Python or Go as needed) that integrate STT, TTS, LLMs, and telephony providers
- Work hands-on with WebSockets, WebRTC, streaming audio pipelines, and real-time event processing
- Contribute to our agent builder dashboard and developer tools (React / Next.js)
- Integrate deeply with Twilio, SIP trunks, VoIP systems, and carrier constraints. Also handling IVRs, transfers, DTMF, call drops, and compliance edge cases
- Anticipate scaling bottlenecks; drive improvements in reliability, observability, failover, monitoring, alerting, and logging
- Enforce security and compliance best practices across the stack
The Interesting Problems You'll Own
- Bridging decades-old telephony systems with modern real-time AI architectures
- Solving latency, jitter, and reliability at scale, where milliseconds determine success
What Makes You a Great Fit
- 5+ years building production-grade systems (senior-level experience strongly preferred)
- Hands-on experience with real-time technologies (WebSockets, WebRTC, streaming audio/video)
- Comfortable owning both backend and frontend
- Strong fundamentals in networking, latency optimization, and system design
- Startup DNA: high ownership, execution bias, ability to ship fast in a low-politics environment
- Opinionated yet pragmatic, you know when to push for elegance and when to ship
- Backend: Node.js, TypeScript, Python, and Go
- Frontend: React, Next.js
- Real-time: WebSockets, WebRTC
- Telephony: Twilio, SIP, VoIP
- AI/voice: SST, TTS, and LLMs
Bonus Points For
- Prior experience with telephony / VoIP systems
- Background in real-time audio or video infrastructure
- ML infra, model serving, or AI agent platforms
- Voice AI or conversational AI exposure
Why Join Aim AI?
- ~$5M ARR, bootstrapped, and growing quickly with production traffic that matters
- Extremely high ownership, low politics, ship fast, see impact immediately
- Work on cool voice AI where reliability directly drives customer outcomes
- If you're excited about building infrastructure that powers realistic AI phone calls at scale, we'd love to hear from you.