Summary
Joel O, is a highly accomplished mobile engineer with over four years of experience building and scaling mobile applications, successfully leading teams and delivering solutions used by thousands of users. He is proficient in Flutter, Dart, Swift, Kotlin, Golang, and JavaScript, with strong expertise in Android and iOS development. His technical stack includes tools and frameworks such as Riverpod, BLoC, Providers, SwiftUI, SQLite, Google Firebase, GraphQL, REST, Docker, Git, GitHub, BitBucket, Postman, Visual Studio, Visual Studio Code, and Xcode. He has also applied design and architecture patterns including MVC, MVVM, and Clean Architecture, ensuring maintainable and scalable solutions. Beyond development, Joel has hands-on experience with automated testing, integration testing, unit testing, GitHub Actions, CI/CD, OAuth, IAM, KYC integrations, and monitoring with Sentry. His proven leadership, ability to mentor junior developers, and success in driving projects like Pay4Me, ScholarsHQ, TravelTube, and Tcourier make him a strong candidate for any team seeking a results-driven and versatile software engineer.
Meet Joel O.
Assessment Scores
Great score on Manage State in Flutter with Nested Components, Difficulty Medium
Great score on Design a Real-Time Financial Data Flutter Application, Difficulty Medium
Great score on Design an Efficient API Integration Strategy for E-Commerce, Difficulty Medium
Experience
PT Chat
Senior Front-End Engineer - Engineering Analyst
Full-Time
Apr 2024 — Feb 2025
Developed full-service mobile app enabling family-district engagement
Built administrator dashboard for managing schools, assessments, and learning styles
Integrated secure authentication and performance monitoring tools
Contributed to UI/UX improvements based on real-time user feedback
Technologies:
Automated Testing
Clean Code
Code Review
Dart
Docker
Figma
Flutter
GCP
Git
GitHub
Google Firebase
GraphQL
IAM
Integration Testing
InVision
InVision Studio
JavaScript
KYC
MVC
MVVM
OAuth
Postman
REST
Scrum
Sentry
Swift
Unit Testing
Visual Studio
Visual Studio Code
Xcode
GitHub Actions
SwiftUI
BitBucket
Gmail
Apple iOS
SQLite
Pay4Me Inc
Senior Mobile Engineer
Full-Time
Dec 2021 — Present
Led the mobile team in architecting and developing the Pay4Me App (Flutter)
Oversaw end-to-end development lifecycle, from planning to App Store/Play Store releases
Mentored junior developers and conducted code reviews to maintain high engineering standards
Built and maintained CI/CD pipelines (GitHub Actions) for automated testing and release
Collaborated with Product, Design, and QA to deliver features that improved user retention by 20%
Technologies:
flutter
dart
swift
kotlin
xcode
figma
Bells University of Technology
Mobile Development Mentor
Full-Time
Jan 2018 — Present
Designed Flutter learning curriculum for junior developers
Mentored 30+ students on cross-platform app development, testing, and deployment
Technologies:
flutter
dart
Projects
Byteman
A terminal based multiplayer pacman game built with Go
Education
B.Sc. in Computer Science & Information Technology
2018 - 2023
Bells University of Technology
Ogun, Nigeria
