Raj Jayavant
Raj Jayavant

A Software Engineer building and scaling consumer products across mobile, web, cloud, and AI.

RECENT
PROJECTS

August health AI mobile app
August Mobile App

A 24/7 health AI companion for iOS & Android, chat privately, decode lab reports, and track nutrition.

  • Chat about any health question privately, upload lab reports and prescriptions to get them explained in plain English, track nutrition and build streaks, and keep records for your whole family in one place.
  • I architected and shipped the core mobile experiences, AI chat, nutrition tracking, EHR integration, onboarding, and notifications.
  • Helped scale the app from 0 to 1M+ downloads with ~51% month-1 retention and a durable 24% 12-month plateau.
Looper YouTube practice looper
Looper

A focused practice instrument for musicians, mark any passage of a YouTube video, slow it down, and loop it until it feels natural.

  • Opens straight into the player with a video already loaded and an A→B loop armed, no setup screen. Markers, speed, loop state, and volume are saved per video and restored silently when you return to it.
  • Built on the official YouTube IFrame Player API behind a player-adapter interface, so the engine never touches the cross-origin iframe and can be swapped or mocked wholesale for tests.
  • Loop wrapping runs on a rAF clock with a ~40ms look-ahead to hide the player's imprecise seeking, and the whole app is keyboard-driven with aria-live announcements and WCAG 2.2 AA as the target.
nextdeploy one-command deploy script
nextdeploy

A one-command deploy script that takes a fresh Ubuntu EC2 instance to a live Next.js app on HTTPS.

  • Handles the whole path in a single command: Node, the right package manager, a private-repo deploy key, environment variables, the production build, PM2, an Nginx reverse proxy, and a Let's Encrypt certificate.
  • Built around recovery rather than happy paths, every step is idempotent and retryable, so a failure offers a menu (retry, drop to a shell, skip, abort) instead of leaving a half-configured server behind.
  • Checks before it acts, waiting out the apt lock, detecting the package manager the repo actually declares, and confirming DNS resolves to the instance before requesting a certificate.
August health record web app
August Web App

The web experience for August, every lab, visit, and reminder in one calm, intelligent health record.

  • Brings every lab, prescription, visit, and reminder for everyone you care for into one calm, intelligent health record.
  • I built and scaled the company's web growth engine: landing pages, the health library, content infrastructure, and web app surfaces serving 500K+ monthly visits.
  • Engineered for SEO, fast Core Web Vitals (sub-2s mobile LCP, TTFB under 400ms), and localization across 37+ languages.
Metronome Logger app
Metronome Logger

A Next.js metronome with a built-in practice log to track BPM progress over time.

  • Built with Next.js, it lets musicians track their BPM progress over time and see how their practice on a given exercise improves.
  • Sound scheduling is delegated to Web Workers to guarantee rock-solid timing accuracy, pre-scheduling clicks ahead of time to work around the limitations of JavaScript's single-threaded nature.

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