Systems architect · Mexico City · Taking on new builds
I build and run the software businesses can’t afford to get wrong.
Twenty-six systems in production — accounting ledgers, point of sale, encrypted storage, AI workstations — designed, coded and operated end to end on one self-managed Linux server.
Selected work
Five systems that show the range: a CFDI 4.0 invoicing ERP, a tax and accounting command center, a public brand site, an encrypted document vault and the backup system that protects all of them.
All other systems
The remaining 21 systems. Status is checked live on the server; protected systems answer, but sit behind a login.
Every system on the server.
How it runs
No platform-as-a-service, no managed database. One Linux server, configured by hand, carries all 26 systems.
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i.
Closed periods stay closed.
Accounting periods are sealed with SHA‑256 and recompute byte-for-byte, so an audited number never drifts after the fact.
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ii.
No vendor in the critical path.
Storage, authentication and databases run on the server itself. The business keeps working when a SaaS provider doesn’t.
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iii.
Speed is a spec, not a hope.
Every system ships with a response-time target. Most are under 50 ms.
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iv.
Written by hand.
25 of 26 systems are original code — no templates, no page builders. The one exception is phpMyAdmin.
Have a system that has to be right?
I take on architecture audits and new builds — from the database schema to the server it runs on.
victor@filemon.net- Based in
- Mexico City · works remotely
- Works in
- PHP · Go · Python · Java · MySQL · Linux
- Engagements
- Architecture audits · new systems · rescues