Shopify apps, built and approved in days — not months.
I'm the developer behind seven approved Shopify App Store apps — all designed, built, submitted, and passed through app review solo, in 2026. Agencies quote six to twelve weeks for a custom app; I scope it today, build it this week, and it's typically approved within days. That track record is the whole pitch.
7 for 7 on Shopify app review — including Checkout UI extensions, Checkout Validation Functions, embedded admin apps, and billing-API integrations.
Scripts are gone. checkout.liquid is next.
Shopify Scripts stopped running June 30, 2026 — Plus stores that missed the migration have already lost their custom discount, shipping, and payment logic. For everyone else, checkout.liquid and ScriptTag checkout customizations shut off August 26, 2026. I rebuild that logic the platform-approved way — Checkout UI Extensions, Functions (discount, delivery, payment, validation), and Web Pixels — and I've already shipped approved Validation Functions to the App Store. Migration audit in 48 hours; most rebuilds ship within days.
Get a migration quote this week →Proof, not promises — live on the App Store
AccessGuard
Real ADA/WCAG auditing with axe-core + Playwright — an honest audit engine, not an overlay widget.
View on App Store →AgeProof
Age-verification with native Checkout Validation Functions — checkout-blocking logic done the platform-approved way.
View on App Store →Merchant Guard
GMC suspension & Misrepresentation risk scanning — policy engine mapped to Google's actual enforcement patterns.
View on App Store →Cited
AI-visibility measurement — how often ChatGPT, Gemini & Perplexity actually cite a store, with optimization guidance.
View on App Store →Payout Guard
Shopify Payments payout-hold and chargeback monitoring with early-warning alerts.
View on App Store →Old Glory
Made-in-USA claim-risk scanning against the FTC's actual standard — catalog-wide, cited to the rule.
View on App Store →CheckoutProof
Checkout-extensibility readiness scanner — scores a store's migration status before the Aug 26 legacy-checkout shutoff.
View on App Store →Engagements
Fixed-scope custom app
- Concept → approved App Store listing (or private/custom app)
- Built within days; approved typically within the week
- Embedded admin, billing API, webhooks, GDPR endpoints — handled
- Fixed price agreed up front. No surprises.
Extensions & integrations
- Checkout UI extensions & Functions (validation, delivery, payment, discount)
- Scripts→Functions & checkout.liquid migrations, rescue work
- Theme-app blocks, App Bridge, GraphQL Admin API
- Weekly invoicing, async-first communication
Agency white-label
- Overflow app builds under your brand
- Your PM, my build — clean handoff, documented code
- App review experience: 7 apps submitted, 7 approved and live
- US-based, contracts & NDAs no problem
Why this works
- The apps are the résumé. Every claim above is verifiable in two clicks — live listings, real reviews, real merchants.
- Solo means fast and accountable. No agency overhead, no handoffs between a salesperson, a PM, and a junior dev. You talk to the person writing the code.
- Compliance is the specialty. ADA, FTC, Google Merchant Center, age verification — the unglamorous, deadline-driven work merchants actually get sued or suspended over.
- Full-stack beyond Shopify. Python/FastAPI backends, React, Postgres, Stripe, AI integrations (OpenAI/Anthropic/Gemini) — 20+ shipped products across domains.
Have a build in mind?
Tell me what you need and I'll reply within one business day with a scope, a price, and a ship date.