Five more pieces from the last few months. Tap one to read it.
Loyalty
Custom loyalty program
Off-the-shelf loyalty apps charge per member and stop at "earn on purchase, redeem at checkout." This build does more: points that auto-apply on subscription renewals, a referral program with fraud checks, an Apple Wallet card, point expiration, and exclusions for staff accounts. All inside Shopify — no per-member fees, no second login for customers. The points balance lives on the customer record and follows them everywhere.
Subscription renewals apply points without a checkout via direct subscription-app API
546
commits in production. Webhook deduplication, advisory locks, 365-day FIFO expiration
Subscriptions
Subscription migration
A B2B supplement brand was moving off a legacy subscription app and onto native Shopify Subscriptions, but couldn't ask hundreds of recurring customers to manually re-subscribe. This build is a staff wizard plus a signed-link bridge: support captures the existing subscription, emails a one-click link, and the customer lands in a checkout that prices, schedules, and bills natively from there.
268
commits in the custom Remix app — B2B wholesale storefront plus migration tooling
1,082
line Import Subscriptions wizard + bulk CSV importer handling up to 1,000 customers per upload
Signed
Shopify Discount Function with HMAC-verified guest-cart pricing
Shipping
Live shipping rates
Most live-rate apps quote shipping for a guessed box. This one studies the store's real shipping history, builds a lookup of which box every SKU combination actually ships in, then asks the carrier for rates against that exact box. Checkout sees the price the warehouse will really pay. Settings include per-service filters, percent and flat-fee markups, and a custom ship-from address.
91
SKU catalog studied. 545 SKU-combo entries built from 8.5 MB of real shipment history
8
named box sizes — Small, Single Bottle, 4-Pack, 5-Pack, 8-Pack, Large, Wide Flat, Envelope
Read-only
All carrier calls locked to quote endpoints — no labels created by the app
Monitoring
Stack watchdog
Most stores run on a stack of services — shipping APIs, chatbots, analytics, tax compliance — and any one of them can fail silently for days before anyone notices. This watchdog checks every connected app on a tight schedule, restarts crashed services on its own, and sends a push notification the second something goes wrong. A daily 7am email summarizes uptime, failed orders, and anything that drifted overnight.
4
tiers of checks — every 5 min, 30 min, 2h, and a daily digest at 7am
Auto-restart
Crashed Heroku dynos get restarted, with a 15-min cooldown to avoid loops
Most owners don't need another inbox app — they need silence until something actually matters. This watcher checks Gmail every minute, ignores newsletters, promotions, and routine order confirmations, and only fires a phone alert when a real customer issue, a payment problem, or a known VIP sender shows up. A small AI classifier sits behind a strict urgency rulebook, so the phone only buzzes when it should.
60s
poll interval. Two Gmail accounts watched in parallel, incremental history sync
3 layers
Hard-rule allowlist → client-domain check → AI urgency classifier
iMessage
Allowlist-enforced delivery, capped at 5 alerts per tick, full audit log
Audio
Walk-up PA announcer
Every kid on a youth baseball team gets their own walk-up moment — a stadium announcer calling their name, followed by the song they picked, mixed together the way a real ballpark sounds. The announcer voice is generated for each player, then ducked under the music automatically so the call sits on top cleanly. Coaches manage the lineup from a phone. Players hear themselves announced when they step up to bat.
TTS
Per-player announcer voice generated once, reused on every at-bat
Sidechain
ffmpeg sidechain compressor ducks the music under the call with a 0.2s fade-out
Streaming
Postgres BYTEA storage, Range-supported audio route for instant playback
