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David Lonski

sys.status: shipping

layer: dashboard

I build software with AI. Agents do the plumbing; I drive the architecture.

Full-stack engineer shipping production systems — hardened forms, serverless functions, role-based AI access. I've built multi-agent orchestrators on three frameworks and know where they break. The work that matters is the work someone actually uses.

I architect. Agents execute.

David Lonski · Rochester, New York

layer: dashboard · active services

service: mjlflooring

live

Built and shipped the production website for MJL Flooring — established a customer inquiry pipeline for a small business that previously had no web presence, hardened the contact form against spam, and improved local discoverability. Live and shipping.

service: onsite-os

dev

Building role-based AI access control to give small teams a safe way to run AI on company files — employees invoke agents, managers oversee the work, admins audit the full trail. The non-enterprise version of what big platforms sell top-down.

infra: agent-stack

archived

Built multi-agent orchestrators on three frameworks to learn where they break — then ditched the ones that didn't hold up. The scar tissue is what I build with now.

layer: services · featured

Selected work

All services
01

MJL Flooring

live2026

Built and shipped the production website for MJL Flooring — established a customer inquiry pipeline for a small business that previously had no web presence, hardened the contact form against the spam overwhelming the owner, and improved local discoverability through a full SEO overhaul.

  • HTML/CSS/JS
  • Vercel Serverless
  • reCAPTCHA v3
  • Resend
View case study
02

Onsite OS

dev2026

Role-based AI access control for small teams — gives employees a safe way to run AI on company files, managers a way to oversee the work, and admins a way to audit the full trail. The non-enterprise version of what big AI platforms sell top-down.

  • AI
  • Role-based access
  • Audit trail
View case study

layer: identity · philosophy

About

I'm a full-stack engineer who uses AI as the primary tool, not a side feature. I architect the system, make the decisions, and the agent writes the plumbing. That's not a pitch — it's how every project on this site got built.

I went deep on agent infrastructure before it was the job. Local LLM routing, MCP servers for tool grounding, model gateways, context engineering. I've broken multi-agent systems on purpose — infinite loops, tool-call hallucinations, context blowups — and I know where the failures live. That's the kind of scar tissue founders actually want.

I ship to production, not to demo. Live services with real users, real spam, real money moving through them. The boring details — serverless email, score-thresholded bot defense, LocalBusiness schema, WebP optimization — are the work that separates shipped from demo-ware.

I architect. Agents execute.