Mobile Developer

Open to full-time

Bio

Justine O. is a Mobile Developer with several years of experience in developing and deploying applications in the eCommerce and fintech sectors. Proficient in Flutter, Firebase, AWS, and various analytics and integration tools such as AppsFlyer and Algolia, Justine builds mobile applications with a focus on user engagement and conversion. Justine employs practices like CI/CD using Fastlane and GitHub Actions, and integrates real-time communication technologies to enhance application functionality. At MAKA, Justine excelled as a Founding Mobile Engineer, integrating video and eCommerce SDKs to boost user engagement and increase conversion rates by 40%. At Cashir, Justine led the mobile development efforts, scaling the app's user base to over 1,000 users in three months and improving transaction precision with real-time socket connections. Justine holds a Bachelor's degree in Computer Science from the University of Jos, Nigeria. Justine is well-suited for roles that involve building and scaling mobile applications, particularly in sectors that require robust user interaction and real-time data integration.

Expertise

FlutterAWSJava

Video Intro

Assessments

General Video Assessment

(90/100)

Manage State in Flutter with Nested ComponentsMedium
Design a Real-Time Financial Data Flutter ApplicationMedium
Design an Efficient API Integration Strategy for E-CommerceMedium

Projects

Cashir App - Mobile Banking

Cashir is a mobile and social banking app designed to meet your financial needs and enable you connect with your friends and people nearby.

Experience

Founding Mobile Engineer
MAKA (Video & social commerce marketplace & platform)Nov 2022 — Nov 2024
- Develop and deploy mobile and web applications for a fashion & beauty marketplace: integrated video & eCommerce SDKs, troubleshoot and debug issues to ensure a seamless user experience.
- Implemented Rewards and Video Reviews features, garnering over 1.5k reviews within three months and resulting in a 40% increase in checkout conversions and increased user engagement.
- Developed Vendor Dashboard to improve order & inventory management, with robust notifications; dashboard reduced otder delays and boosted sales for vendors.
- Revamped Sign-up, Cart, and Checkout features; integrated drop-off locations feature (for cheaper delivery fees) which reduced checkout dropoff for users in remote locations.
- Migrated payment stack to Paystack to offer additional payment options; this significantly reduced failed payments.
- Collaborated with the backend team to resolve network-related performance issues and reduce endpoint wait times.
FlutterSentryAlgoliaAmplitudeAppsFlyerAgoraFirebaseAWSShorebirdFastlane
Lead Mobile Engineer
Cashir (Fintech platform providing constant access to cash ) Apr 2022 — Nov 2022
- Built Android app (with Flutter), scaling the user base from 0 to over +1k users within the first 3 months.
- Integrated Google Maps & geolocation services which increased transaction volume by enhancing matching precision between cash requesters & providers, and driving prompt user interactions through Pusher's real-time socket connections.
- Integrated third-party payment solutions and company backend APIs to facilitate seamless cash transactions, bill payments, and virtual account creation, optimizing user experience and ensuring immediate funding upon onboarding.
- Set up aCI/CD pipeline to automate app deployment to Firebase App Distribution for testers and the store.
FlutterFirebaseWebsocketsGithub ActionsFastlaneOneSignal
Lead Mobile Developer
AvocatApp (Parent company: Remotili) (Timely legal aid for Nigerians) Sep 2021 — Mar 2022
- Led the development of the Avocat mobile application from inception to launch on app stores; developed an admin panel (in Flutter) to regulate/moderate lawyers and users activities, and manage payments and settlements.
- Implemented algorithm to match users with nearby lawyers and integrated Google Maps for visual guidance. This optimized legal consultations, especially in cases of rights violations.
- Integrated real-time chat and video SDKs, enabling swift and efficient legal assistance.
FlutterDartJavaServerpodFirebase