// Software engineering studio
Software built like
precision engineering.
I design and ship reliability-first distributed systems, real-time infrastructure, and production AI — the kind where a dropped message or half a second of latency isn’t acceptable.
$ whoami
john montoya — principal engineer / founder
$ cat ./now
building KUNI — an AI voice receptionist
$ status
systems nominal — accepting new work
What I build
04 disciplinesDistributed systems & platforms
High-throughput backends and developer platforms. Multi-cloud Kubernetes on AWS, GCP, and Azure. Systems that scale sideways and stay observable.
Real-time & concurrency
Low-latency, multithreaded infrastructure where timing is correctness — a pedigree in real-time market-data and electronic trading in advanced C++.
Production AI
Agentic systems, LLM orchestration, and conversational voice engines that hold up under real traffic — deterministic where it must be, intelligent where it counts.
Reliability engineering
The unglamorous parts done right: no dropped messages, no silent data loss, no half-second stalls. Correctness first, then speed, then everything else.
Selected work
01 / flagshipProduct · sole architect
KUNI
hellokuni.com ↗An AI voice receptionist I conceived, architected, and shipped solo. It answers every call, text, and WhatsApp like a focused human — books appointments and answers from a business’s own knowledge base, 24/7.
The hard part isn’t the model — it’s the engine around it: a deterministic “railroad” that runs exactly one model turn per transition against fully-committed context. Tight causality, no double-utterances, no cut-off speech — human-quality mechanics living in code, so they survive an LLM swap.
Visit hellokuni.com →Conversational engine
deterministic railroad, model-independent
Multi-tenant platform
per-node prompts · tools · greetings
Telephony + WebRTC
voice, SMS, WhatsApp, web widget
Calendar + RAG
booking, knowledge base, directions
20+
years in high-performance distributed systems
11,000+
orders/min at peak (Jet.com scale)
3
clouds — Kubernetes on AWS · GCP · Azure
1
AI receptionist architected + shipped solo
// About
John Montoya
Founder of hellokuni.com (KUNI) · engineer behind Dot Computer Craft
Two decades building the systems that can’t fail — real-time market-data and electronic trading in advanced multithreaded C++, large-scale backends handling thousands of orders per minute, and multi-cloud platforms as a Principal Engineer and Head of Platform Engineering.
Today that same reliability-first standard goes into production AI: I architected and shipped KUNI, an AI receptionist, from the conversational engine to the telephony stack to the multi-tenant platform. Dot Computer Craft is where I take on the systems that have to be right.
// Let’s build
Have a system that has to be right?
Distributed systems, real-time infrastructure, or production AI — if it can’t afford to break, let’s talk.
Start a conversation →