Software Engineer
I spent four years at Google keeping planet-scale systems fast, cheap, and boringly reliable. Now I build products end to end for the people who need them.
Payroll and project-tracking platform for a Mexican residential construction company. Worker org hierarchy, lot-by-lot build progress, and a payroll engine that handles CURP/RFC/NSS, fiscal caps, and cost-center reconciliation.
Identity, design system, and site for lab404 — the studio side of what I do. Every pixel and every line of it is mine.
lab404.org↗Google's global authorization system. Designed a serving strategy that cut storage cost 90% at 150M QPS, launched a C++20 bulk upload service moving billions of records a day, and led schema migration for petabytes across thousands of databases.
Re-architected LLVM's test-case reducer. The rewrite runs 10× faster and produces 3× smaller cases than Bugpoint; the community proposal behind it became the foundation for the tool that shipped.
Read the proposal↗I write software that has to hold up. At Google Core Data I owned services handling 150M queries per second — the kind of thing where a bad deploy is a headline, and where "make it 90% cheaper" is a real quarter-long problem with a real answer.
That habit follows me into product work. Renovacreto is a payroll system for a construction company in Mexico: nobody there cares about my latency graphs, they care that the crew gets paid correctly on Friday. Same discipline, different scoreboard.
These days I work independently, leaning hard on AI tooling to move at a pace that used to need a team. Spanish native, English fluent, French conversational.
Open to freelance work, contract engineering, and interesting full-time roles. Fastest way to reach me is email.
hola@diego.tf