Joshua Companion_
Product Engineer · mobile, web & AI
I take products from idea to the App Store with React Native, Next.js and AI. I've led client builds, co-founded an app studio, and built a product that GigRadar acquired.
// experience
Sleeper · Software Engineer, Web & Mobile
Apr 2026 – Oct 2026
- On the team bringing Sleeper to web: shipped live drafts in every format and the full league home with settings.
- Proposed a measure-then-optimize plan for in-app banners: added analytics for how often each banner converted users to Picks, then scaffolded Statsig Autotune to show the best-converting banners automatically.
AutoHDR · Full Stack Engineer
Jan 2025 – Apr 2026
- Generated ~200K AI twilight real-estate images as training data on parallel EC2 workers (fal.ai), streamed into Label Studio; led a 20-person team that labeled them in under a week.
- Built the AWS Batch scoring pipeline for a $50K public machine-learning hackathon.
- Built containerized model inference on AWS during the move from GCP, plus quality checks and alerting.
Happii Apps · Co-founder, Independent App Studio
2023 – Present
- StoryHero, built end to end: AI picture books starring a child's own character, in 29 languages. Moved generation from a 15-minute blocking request to a background job with live progress.
- CardToPlease, built end to end: AI greeting cards from a photo, on web and iOS from one shared API. Chose edit-based image generation to keep faces recognizable, and capped refinements to control model cost.
- Ran growth for Swipy (4.5★, 400+ ratings) and Recap (4.1★, 80+ ratings), built by my co-founder: Meta ads, video ad templates and our in-house marketing dashboard.
Ecordia Studios · Lead Mobile & Full Stack Engineer
Nov 2023 – 2024
- Led React Native + Expo builds and releases for client apps in health tech, research, fintech and AI.
- HubaVet: vet video consults over WebRTC with Stripe Connect payments, in a shared Turborepo monorepo.
- Built a clinical research app with session recording and a Next.js dashboard for researchers.
PouncerAI · Lead Engineer
2023 – 2024
- Built the Pouncer Profile Optimizer (AI scoring and rewrites on Next.js, Firebase and Stripe), which GigRadar acquired.
- Built the AI proposal-writing Chrome extension, including a move off Plasmo to a custom setup.
Volcon · Senior Front-End Engineer
Mar 2022 – Oct 2023
- Owned the website, built the mobile app's Node.js backend, and shipped Stripe preorders for the Stag.
// skills & education
- Mobile
- React Native, Expo, iOS + Android, React Navigation, Redux / Zustand, Reanimated, EAS + OTA updates, push notifications
- Web
- TypeScript, Next.js, React, Tailwind CSS, Vercel
- Backend
- Node, Python, FastAPI, Supabase/Postgres, Drizzle, GraphQL, REST APIs, WebSockets, AWS
- AI & Growth
- OpenAI, Claude + Claude Code, fal.ai image and video models, Statsig, PostHog, Meta ads
- Tools & APIs
- Git, Docker, CI/CD, Jest, Maestro, Sentry, Stripe, RevenueCat, Plaid, WebRTC
- Education
- Team Treehouse · Front End Web Development & Software Engineering · 2020