$ whoami
Charles Fonseca
$ cat about.txt
Senior software engineer. Leading backend and infrastructure at mygardyn.com. Writing about databases, Zig, and systems programming.
$ breaking systems.▌
Soli Deo Gloria ✝️
Recent posts
All posts →Selected work
Current role
Lead backend & infrastructure at mygardyn.com
Real-time systems for 100k+ online devices ingesting 5k events/second.
Working on
Serija Forecasting for Shopify
Inventory forecasting and purchase ordering for Shopify merchants: when to reorder, how much, and the PO to send.
Open source
zedis — Redis-compatible store in Zig
RESP, TTLs, RDB/AOF persistence, pub/sub. #3 on Hacker News Show HN.
Open source
pgzx: Postgres extensions in Zig
Fork of Xata's pgzx, brought to Zig 0.16. Typed allocators, SPI, FDW, background workers.
Side project
Building vvitae.com
Full Cloudflare® stack (Workers, D1, KV, R2). Product to delivery, end-to-end.
Also available for consulting
Cloud cost, database performance, Cloudflare®.
Fixed-scope audits and hands-on fixes. Recent result: cut a SaaS cloud bill from $27k to $17k/month while the user base doubled.
all systems operational
mygardyn api operational
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60 days ago ············· 99.82% uptime ·············· today
zedis operational
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60 days ago ············· 99.82% uptime ·············· today
vvitae.com operational
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60 days ago ············· 99.89% uptime ·············· today