I build cross-platform mobile MVPs the way they should be built - one codebase, real backend, real push notifications, submitted to both app stores. Not a wrapped web app. Not a prototype you can't ship.

What that looks like in practice: I've shipped apps with daily AI prompts, real-time sync, and production-grade React Native builds running on Convex, Clerk, and Expo EAS.

The product changes every time. The standard doesn't.

Founders shipping a mobile-first product, not a web app with a mobile build bolted on later.

Anyone who needs the app actually live on the App Store and Play Store, not just delivered as a build file.

Founders who want to own every account on day one - GitHub, Clerk, Convex, Expo, Apple Developer, Google Play.

You need a fully native build (Swift + Kotlin) - I work in React Native + Expo.

Your scope requires complex offline-first sync, video processing, or hardware integrations - message me and we'll scope it differently.

→ Phase 1 (Weeks 1-2)

60-min kickoff - scope, success criteria, what stays out

All accounts set up under your ownership from day 1 - GitHub, Clerk, Convex, Expo EAS, Apple Developer, Google Play

Auth + onboarding flows - Email, Apple Sign-In, Google Sign-In via Clerk

Core navigation + first screens

TestFlight + Play Store internal testing live from Phase 2, not Week 6

→ Phase 2 (Weeks 3-4)

Core feature build - your app's "money screen" working end-to-end

Convex backend - real-time data, no Firebase mocks

Push notifications via Expo EAS - the kind that actually deliver

AI integration if needed - Claude, OpenAI, your call

1-3 third-party integrations - analytics, payments, email, etc.

→ Phase 3 (Week 5)

Animations + polish

Streaks, activity history, or whatever your retention loop is

Ongoing TestFlight + Play Store internal builds

→ Phase 4 (Week 6)

QA + bug fixes

Final EAS production builds.

App Store + Google Play submission - final builds, screenshots prepared for both platforms, listing copy drafting, privacy policy draft.

30-min handoff call + Loom walkthrough of the code

Bonus: Single-page marketing landing page + privacy policy (required for store submission) - if you don't have one already.

Plus 14 days of post-launch support - bug fixes and small tweaks, on the original scope. App store review response included.

13+ shipped projects on Contra, 4.86 rating, hired by a Unicorn

Cross-platform from one codebase - the same React Native + Expo stack used by Shopify, Discord, and Coinbase. One codebase to maintain, two stores to ship to.

Real engineering, not just prompting - push notifications, app store reviews, and provisioning profiles aren't problems AI can vibe-code through.

I handle the boring parts - dev account setup, store submission, push certificates, EAS configuration. You don't lose two weekends figuring out provisioning profiles.

Quick responder, same-day on most messages

Scope locked in week 1 is what ships at launch - no surprise extras.

App store review timelines are on Apple and Google (usually 24-72 hours). I respond to rejections at no extra cost as long as scope hasn't changed.

Note: Apple Developer ($99/yr) and Google Play ($25 one-time) fees are paid directly by you - the accounts must be in your name (personal or business) for ownership to stay clean.

Message me, or book an intro call: https://cal.com/raymondui/contra

Building both web and mobile? Pair this with my SaaS MVP service - same standard, same voice, scoped together.