Product engineering
Software products designed, built and operated end to end: web apps, mobile apps and messaging integrations, from the first sketch to billing and support.
DWG. 001 Company overview
AI-native software, engineered to spec.
Metatron Software Engineering is an independent software company from Italy. We design, build and run our own software products, with AI agents in the loop from the first spec to production.
Detail A What we do
A.1
A.2
Applied AI
Language models where they earn their place: AI features inside products, AI coding agents that ship real features, and the guardrails that keep both honest.
Detail B Products
B.1 · Live
Appointly
Appointment booking with two-way Google Calendar sync and automatic WhatsApp reminders, for small businesses that live by their calendar.
getappointly.app ↗| For | Physiotherapists, beauty professionals and any business that books appointments |
|---|---|
| Does | Calendar, client records, and WhatsApp reminders sent automatically before each appointment |
| Integrations | Google Calendar, WhatsApp Business (Meta Cloud API) |
| Languages | English, Italian, Romanian |
| Marketing | Advertising campaigns on TikTok and Meta, run by our in-house marketing tool through the TikTok API for Business and the Meta Marketing API. How we use TikTok |
| Status | Live |
Detail C How we build
- Spec firstEvery feature starts as a written spec with a clear "done when".
- Agents buildAI coding agents do much of the implementation, inside a harness we designed for long, unattended runs.
- Tests judgeWork is verified by tests and real tools, never by a model grading its own output.
- Ship leanThe smallest complete change goes to production, then gets measured.
Our agent tooling is open source: Agent Harness Kit on GitHub.
Detail D Company
D.1 · Entity
Independent
Metatron Software Engineering di Stefano Rifici, a sole proprietorship registered in Italy.
D.2 · Founder
Stefano Rifici
Full-stack engineer and engineering manager with more than ten years of building software, focused on applied AI.
D.3 · Reach
Remote, worldwide
Based in Italy, working with people anywhere, in English and Italian.
Detail E Contact
Write to stefano.rifici@metatronsoftwareengineering.com
Questions about the company, its products or its policies all go to this address, and the founder replies personally.