14 shipped products across delivery, travel, ERP, retail and field logistics. The first six carry the most engineering depth and are covered in full; the rest are earlier production work with the same case-study detail behind each one.
Super appMobile Developer, food delivery vertical
Food delivery inside a multi-service super app shared with grocery and online retail, with live order tracking end to end.
Delivery, grocery and retail share surfaces, so a change in one vertical cannot regress the others. Realm keeps the app usable when the connection drops mid-order.
TravelMobile Engineer, travel platform
A modular travel platform (flights, hotels, eSIM and insurance), shipped as an embeddable module inside a native super app.
It does not ship as an APK. CI builds an Android AAR and an iOS xcframework and publishes both to GitHub Packages for the native super app to consume, so the module has to hand off tokens, force logout when refresh fails, exit cleanly back to native, and reset its own state on resume.
ERPSole developer, end to end
The mobile client for a multi-tenant ERP (sales, purchasing, warehouse, POS, CRM and accounting), on phones and Sunmi POS handhelds.
One binary has to behave like a different product for every tenant. A server-driven permission layer gates each module and each CRUD action from the ACLs returned at login, and subdomain-based base-URL switching points the same build at whichever backend that tenant runs.
Booking platformBackend Engineer, sole developer
The API behind a multi-role booking product: conflict-free scheduling, staff rosters, loyalty and management analytics.
The slot engine had to reconcile six independent sources of unavailability (opening hours, per-staff working hours, full-day leave, mid-day breaks, short absences and live bookings) without ever double-booking. Merging the blocked periods into normalised intervals first keeps it linear, instead of testing every candidate slot against every constraint.
Field salesMobile Developer, end to end
Sales automation for direct distribution teams: orders, cash collection and returns, taken on the road.
Vans go out for a full shift with intermittent connectivity. Every write is queued locally and reconciled on reconnect, so no order or cash entry is lost.
MarketplaceDesigner and developer, solo
A marketplace connecting local farmers directly to buyers, removing the intermediary from the sale.
The audience is non-technical and mostly on entry-level Android hardware, so the interface had to stay legible and the app had to stay fast on devices with little memory to spare.
Field sales, warehouse, logistics and laboratory tooling built for business clients, plus one design-only engagement.
WarehouseMobile Developer
Warehouse operations: order preparation, fulfilment tracking, and live inventory across multiple platforms.
InventoryMobile Developer
Stock tracking from procurement to sale, with barcode scanning and inventory reporting.
LogisticsMobile Developer
The coordinator side of a logistics operation: mission planning, task assignment, and live delivery tracking.
LogisticsMobile Developer
The driver-side companion app: assigned deliveries, package tracking, and navigation.
HealthcareMobile Developer
Laboratory logistics: sample tracking and patient analysis management for healthcare labs.
MarketplaceDesigner and developer, solo
A hospitality job platform where completing hotel missions earns candidates real employment offers.
E-commerceMobile Developer
A storefront and order management app for businesses selling online.
Product designProduct design only
A telemedicine app connecting patients to healthcare providers for online consultations.