Senior Software Engineer

Company Description

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 a Full-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
• Designing concurrent streaming pipelines for live audio → transcription → reasoning → response

What Makes You a Great Fit

• 5+ years building production-grade systems (senior-level experience strongly preferred)
• Deep expertise in JavaScript / TypeScript and Node.js
• 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

Our Tech Stack

• 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
• Infra: Docker, Kubernetes, Cloudflare

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.