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Upload a resume and a job description, get back a match score, the keywords you hit and missed, ATS formatting flags and rewritten bullets in one pass. Four serverless routes on Next.js 16 talk to the Google Gemini API, and a 7-model fallback chain with retry-on-429/404/503 keeps success near 100% on a rate-limited free tier where one model alone would just fail. Responses come back through Gemini responseSchema definitions mapped 1:1 to typed interfaces, so there is no JSON parsing to break. The PDF pipeline reads an upload with pdf-parse, pulls out 7 sections and re-renders a single-column ATS-safe document - a 30-minute manual reformat done in under 10 seconds.

A full-stack markdown notes app on the Next.js 15 App Router. Seven Supabase Edge Functions in Deno hold every note operation behind one typed invokeFn helper, so ~2,800 lines of app code share a single data-access path. Autosave debounces at 1.5s, queues concurrent writes and backs off 1s/2s/4s, with a throttled localStorage mirror underneath - nothing is lost on a failed save, a closed tab or a mid-edit note switch. Supabase Auth and Postgres row-level security isolate every tenant on every read and write, and SSR middleware only accepts same-origin relative redirects after login. Export to .md, .html or .zip is lossless and collision-safe, with JSZip dynamically imported to keep ~95 KB off the critical path.

A document editor where everyone types at once and no server holds the data. Yjs and WebRTC sync peers directly at sub-100ms latency and show who else is in the room. The Web Crypto API generates session keys client-side, so 100% of document data stays encrypted in transit. Built on Next.js, React and TipTap with a modular Tailwind v4 component architecture.

Type a title and it searches 10,000+ films through the OMDb API. Tuned state handling cut query response times 25%, and React Hooks refill the glass-morphism grid without a page refresh.

A 3D globe rendered in Three.js with custom earth textures. Search a city and a live weather API pulls temperature, wind and humidity, then the view moves from the spinning globe to a plain readout. Optimized texture loading holds a steady 60 FPS, and async fetching trimmed 20% off load time on that handoff. Holds up from desktop down to mobile.