Davin Willis · Systems & Web

I build things
that run.

Student by day, engineer by night. I build systems that actually operate: trading fleets, data pipelines, and the tools that keep them alive.

See my work ↓GitHub ↗

Off the clock

Currently reading: Thus Spoke Zarathustra, Friedrich Nietzsche
Favorite song: “Blowout,” Radiohead
Currently watching: Supernatural
Favorite films: Good Will Hunting / Spirited Away

automated services running 24/7

asset classes traded across the fleet

706

leads found by a tool I built

strategies backtested over 5 years

01 · Engineering

Systems that stay up
when I'm not looking.

01Trading Fleet InfrastructureA 15-bot algorithmic paper-trading platform running unattended on AWS. Each bot is a systemd service with its own strategy, risk limits, and logs. Everything is deployed, scheduled, and restarted without me touching a thing.PythonAWS EC2systemdcron↗02Finance PipelineAn automated personal-finance tracker built on the Plaid API. Pulls transactions nightly, categorizes them, and rolls everything into reports. It's the kind of bookkeeping that never gets skipped because no one has to remember it.PythonPlaidAutomation↗03Fleet WatchdogExternal monitoring for the trading fleet, a dead-man's-switch that lives outside the infrastructure it watches. If a bot goes quiet, I know before the market does.PythonMonitoringAlerting↗04Lead-Gen ToolA Google Places pipeline that swept local business data, filtered for real opportunities, and surfaced 706 qualified leads. Built to answer a business question, not to be a demo.PythonGoogle Places APIData↗05Hidden Content DetectorA defensive security tool that detects prompt-injection and text-smuggling attacks: invisible Unicode, bidi Trojan Source overrides, tag-char ASCII smuggling, homoglyphs, and text hidden by styling, across 8 file formats. An adversarial suite attacking my own detector caught a real false positive (legitimate emoji share code points with smuggling payloads) and drove context-aware fixes: zero false positives or negatives across the suite. Hardened for the public internet with SSRF and zip-bomb defenses, strict CSP, and in-memory-only processing.PythonFastAPIDockerRenderSecurity↗

02 · Web

Sites I build for local businesses.

KAT Home Services (Next.js build)↗A marketing and portfolio site for a home repair and remodeling business in Bardstown, KY. Designed, built, and deployed end to end, including custom domain setup, HTTPS, and post-launch maintenance.Live client site BLAIR STATE (Next.js + WebGL build)↗A 3D WebGL storefront for a streetwear brand: a full React Three Fiber scene with a scroll-driven camera, custom shaders, and a branded 3D world, built headless-Shopify-ready. Designed and built end to end.Live 3D storefront BLAIR STATE · Drops (Next.js + WebGL build)↗A 3D WebGL streetwear storefront with a scroll-driven narrative: a mouse-trailed graffiti-reveal orb, pinned product drop crossfades, and shader-driven scenes, built headless-Shopify-ready. Designed and built end to end.Live 3D storefront BLAIR STATE · The Yard (Next.js + WebGL build)↗A 3D WebGL streetwear storefront set in a night freight yard. Scrolling rolls a graffiti-bombed train past you, and a spray-can cursor paints the cars in real time. Original concept, built headless-Shopify-ready. Designed and built end to end.Live 3D storefront Handyman (Next.js build)↗The full treatment: a Next.js rebuild of the handyman site with animation and polish. It's what a local business gets when the budget says premium.Live demo Crank & Torque Auto (Next.js build)↗A full Next.js build for a fictional Louisville auto shop. Industrial type, tap-to-call throughout, and a design curated to the business, not a template.Live demo Cardinal Cuts (Next.js build)↗A heritage barbershop demo on cream and oxblood, with a proper price board and a design that feels like the shop has been there since 1962.Live demo Lacquer & Lily (Next.js build)↗A fashion-editorial demo for a nail studio. Blush, rose gold, a didone masthead, and a spa menu where the elegance comes from restraint.Live demo Wren & Kettle (Next.js build)↗A split-screen café demo: a fixed forest-green panel holds the brand while the menu scrolls beside it. Built to show structural range, not just visual range.Live demo Bakery↗A warm, conversion-focused site for a local bakery, with menu, hours, and ordering front and center.Live demo

03 · About

Night shifts teach you what production means.

I'm a Plant Engineering Supervisor on the night shift at UPS Worldport, the largest automated package-handling facility in the world. When something breaks at 3 a.m., there's no ticket queue. You find it, you fix it, and the planes leave on time.

That mindset shapes everything I build. I taught myself AWS and run a fleet of production systems on the side: trading bots, pipelines, and monitors, all designed to keep operating when I'm asleep, in class, or on the plant floor.

By day I'm a triple major in Computer Science, Finance, and Philosophy at the University of Louisville. The combination is deliberate: build the system, understand the market, question the assumptions.