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joshkraus27/README.md

Josh Kraus

Mechanical Engineering student at Penn State who ships production software.

I'm the co-founder of FitLifeAI — an AI-powered iOS fitness app live on the App Store (600+ downloads, 150 MAU, 40 paying subscribers, 4.9-star App Store rating) — and a contract iOS developer for Connect Happy Valley, a native visitor-guide app built for a paying client.

What I work on

  • iOS — Swift, SwiftUI, UIKit, App Store Connect, TestFlight, StoreKit-adjacent monetization (Superwall)
  • Backend — Supabase (PostgreSQL, Edge Functions, Row-Level Security), REST APIs, transactional email (Resend)
  • Data & automation — Python data pipelines, GitHub Actions (CI/CD), PostHog analytics
  • ML foundations — Python, NumPy, TensorFlow · Machine Learning Specialization (Stanford Online) · Deep Learning Specialization (DeepLearning.AI)

Selected work

Project What it is
chv-sync-pipeline Production data pipelines (Python + GitHub Actions + Supabase/PostgreSQL) syncing ~1,650 business listings and local events hourly into a client's iOS visitor guide. Published with the client's permission.
fitlifeai-engineering Engineering write-ups from building FitLifeAI: a 745K-row PostgreSQL query optimization (~9s → ~130ms, plus a profiled 6.8x regression fix), the freemium paywall/quota system, and transactional email infrastructure. The app's source is private; these docs cover the architecture and decisions.
FitLifeAI-Support Support site and privacy policy for FitLifeAI.

Currently

  • Scaling FitLifeAI's meal-planning and AI coaching features
  • Shipping Connect Happy Valley to the App Store
  • Open to Summer 2027 software engineering internships

📫 joshkraus27@gmail.com · LinkedIn

Pinned Loading

  1. fitlifeai-engineering fitlifeai-engineering Public

    Engineering write-ups from building FitLifeAI: PostgreSQL query optimization, freemium paywall architecture, transactional email infrastructure

  2. FitLifeAI-Support FitLifeAI-Support Public

    Support site for FitLifeAI, an AI-powered iOS fitness app

    HTML

  3. chv-sync-pipeline chv-sync-pipeline Public

    Scheduled data pipelines (Python, GitHub Actions, Supabase) syncing business listings and local events into a production iOS visitor guide

    Python