senior software engineer · cto / rust · go · swift · svelte
Senior software engineer and CTO shipping things end to end — from Rust engines and Go backends to native SwiftUI apps and SvelteKit on the edge. I care about speed, correctness, and shipping.
selected work
Not demos. Real engines, real apps, real users — each one taken from an empty repo to something running.
Napkin math, engineered
A Mathcad-style live calculation worksheet for engineers and students. Write the math the way you would on paper — with real units — and it solves as you type, recomputing the whole sheet in dependency order every time you change a number. Unit-aware, runs entirely in the browser, no install.
Realtime news intelligence
A realtime RSS ingestion engine that watches hundreds of sources, deduplicates the noise, and ranks the stories that actually matter — with entity extraction and AI summaries so you read the signal, not the feed.
Zero-knowledge Mac backups
A Time Machine alternative built from scratch in Rust: content-defined chunking, BLAKE3-addressed dedup, and encrypted, versioned snapshots pushed to S3-compatible storage. Browse and restore any version from a browser tab — decryption stays in-tab, so the server never sees your files.
Fast macOS disk cleaner
Reclaim every byte. A fast macOS disk cleaner with a Rust scanning engine and a native SwiftUI app — it finds dev caches, build artifacts, and forgotten junk, shows every path before it touches anything, and moves files to Trash first. Nothing leaves your machine.
Self-hosted NVR
A fast network video recorder that writes straight to your own disk — no cloud relay, no subscription, no one watching the watchers. LAN-only and runs anywhere, with a live grid in the browser. The productized sibling of my streaming engine: free on one camera, then yours forever for a one-time fifty bucks.
Bible study, reimagined
A full-stack Bible study app: a native SwiftUI iOS client with offline reading, audio playback, AI chat, and cross-device sync, backed by a TypeScript/Bun API and a SvelteKit marketing site. Shipped end to end — app, backend, and infra.
Maintenance, organized
A CMMS for teams that run on equipment: track assets, schedule preventive maintenance, and move work orders from open to done with checklists and tool check-in/out — while it keeps a running tally of parts-and-labor cost. A full maintenance workspace, served from the edge on Cloudflare Workers.
Local padel, Ultimate-Team style
Run your weekly padel days like a pro league: auto-balance 12-player, 3-court Americano and Mexicano formats by ELO, score every match, and turn each bro into a collectible FIFA-style player card — serve, bandeja and víbora ratings, Bronze→Gold tiers, and holo MVP specials that level up with their results.
A browser ranch you defend at night
A relaxing top-down ranch game in plain JavaScript and HTML5 Canvas — no build step, no dependencies. Raise cows, chickens and sheep, gather eggs, milk and wool, and plant crops by day; then fence your pens and run lamps off solar-charged batteries to hold back the wolves that hunt at night.
the toolkit
I pick the tool that fits the job — systems work in Rust and Go, native UI in SwiftUI, product on SvelteKit. The constant is shipping something solid.
about
I'm Francisco — a senior software engineer and CTO who likes owning a problem from the metal up to the pixels. I care about software that's fast and correct, and about teams that actually ship.
Lately that's meant content-addressed backup engines in Rust, realtime ingestion pipelines in Go, native macOS and iOS apps in Swift, and slick frontends on SvelteKit + Cloudflare. If it's hard and worth doing well, I'm in.
get in touch
Always happy to trade notes on engineering, products, and hard problems. The fastest way to reach me is email or X.