Senior Mobile Engineer
Senior Mobile Engineer
Senior mobile engineer with 7+ years shipping consumer and enterprise apps across Flutter, Android, and iOS. I lead the architecture, the realtime and payment paths, and the release to both stores.
2026
iOS · Android
From February 2026 I worked on Lifteller, a social platform where people offer, request, and raise support. It is live on the App Store and Google Play: a feed, liftclips, and a wallet for monetary and non-monetary lifts.
2025
Flutter · iOS · Android
Two products, both live on the App Store, Play Store, and web. Homemade is a wholesale marketplace for buyers, verified vendors, dispatch riders, and admins. Checkout covers cart, delivery and pickup, coupons, and Paystack, with Socket.IO order updates and live rider tracking. Bitselah moved crypto and gift-card trading off WhatsApp, with payouts, disputes, and referrals.
2025
Flutter · iOS · Android
Dual-flavor apps for clients and lawyers. Emergency legal response and fast-consultation matching over WebSockets, with Agora calls, Firebase push, Google Maps, and wallet, card, and corporate payments.
2023
Flutter · iOS · Android
Led the mobile team on business communication and CRM apps used by thousands of people. VoIP push through APNs and Firebase, refresh-token auth, and releases on both stores.
2022
Flutter · iOS · Android
Three apps for logistics, parcel, and drivers. Live tracking, maps, and payments, published on both stores and past 2,000 downloads. The Play listings have since been taken down.
2021
Flutter · iOS · Android
A US stock-trading app with ACH bank linking and real-time orders, built at WePrototype alongside Fixx, a geolocation app for finding nearby handymen. Hash shipped on both stores; those listings have since been removed.
2026
From February 2026, the iOS and Android apps are live: a feed, liftclips, and a wallet for monetary and non-monetary lifts.
2025
Homemade, a wholesale marketplace for buyers, verified vendors, and dispatch riders, with Paystack and live tracking. Bitselah, crypto and gift-card trading with payouts, disputes, and referrals. Both are live on the stores and the web.
2025
Client and lawyer flavors, with Agora voice and video, English and French, and wallet, card, and corporate payments.
2024
Rewrote the Flutter app in Kotlin and Swift. Calls still arrive after the app is killed, through CallKit and VoIP push. Each store listing passed 1,000 downloads.
2023
Led the mobile team. Business calling on both stores, with VoIP push through APNs and Firebase.
2023
Led a fintech and operations product on mobile and desktop, with Supabase, role-based access, and CI for release.
2022
A production calling app with SIP, CallKit, and delivery after the app is killed, released on both stores.
2022
Logistics, parcel, and driver apps on both stores, past 2,000 downloads, with live tracking and payments.
2021
Nearby handymen on Fixx. ACH payments and real-time stock trading on Hash, with biometric login.
2021
First shipped product. Flutter, Java, Kotlin, and Laravel, published past 100 downloads.
2020
Advanced Diploma in Software Engineering, before the Middlesex degree.
First Class
B.Sc. Information Technology, Computer Science.
Feature modules, BLoC and Cubit, and a codebase a new teammate can open. Native modules only where the phone requires them: CallKit, push, camera, maps.
Sockets, VoIP in the background and after the app is killed, live maps, and call flows that still arrive when the screen is off.
Wallets, cards, Paystack, and the checkout states around them. The money path has to be boring and obvious.
Staged rollouts, Crashlytics, Sentry, and CI. Apps I have led are on the App Store and Google Play, not stuck in a TestFlight.
February 2026 — Present
Lifteller
Working on the Lifteller iOS and Android apps, live on the App Store and Google Play.
December 2025 — June 2026
Nerdbug
Shipped Homemade, a wholesale marketplace for buyers, vendors, and riders, with Paystack checkout and live delivery tracking, and Bitselah, crypto and gift-card trading with payouts, disputes, and referrals.
January 2025 — December 2025
AptResponse
Owned mobile architecture for the client and lawyer apps, including calls, dispatch, and consultation payments.
June 2023 — February 2025
PressOne Africa
Led Flutter, then the rewrite to Kotlin and Swift. Calls still arrive after the app is killed, through CallKit and VoIP push, with a CRM web view, refresh-token auth, and Sentry, Mixpanel, and Crashlytics.
October 2023 — October 2024
Remedi Africa
Led a fintech and digital-operations app across mobile and desktop, with offline access and CI for release.
February 2022 — January 2024
PressOne Africa
Shipped the Flutter calling app on both stores, past 2,000 downloads, with SIP, CallKit, and delivery after the app is killed.
February 2022 — October 2023
Porta Africa
Led the Dandako logistics, parcel, and driver apps on both stores, past 2,000 downloads, with live tracking and payments.
August 2021 — February 2022
WePrototype Technologies
Built Fixx and Hash: nearby handymen, ACH payments, and real-time stock trading, with biometric login.
December 2020 — August 2021
Capriquota
Full-stack mobile and web. Flutter, Java, Kotlin, and Laravel, including the Pjcempire app, past 100 downloads.
Middlesex University Dubai — B.Sc. Information Technology, Computer Science. First Class.
The useful note names the product, the constraint, and what has to ship. Email is the best way in.
durotimijohnson@gmail.com+234 (0) 814 864 2968