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Flutter Mobile Engineer (Mid-Level / Senior)

CapitalSage Holdings

Lagos, NigeriaFull-timePosted Jun 17, 2026

Job description

We are looking for talented Flutter Engineers to build and maintain high-quality mobile applications powering digital banking, payments, lending, agency banking, and financial services platforms. The ideal candidate should have experience developing secure, scalable, and user-friendly mobile applications with a strong focus on performance, reliability, and customer experience.

Key Responsibilities

Design, develop, test, and maintain Flutter mobile applications. Build reusable, scalable, and maintainable mobile components. Integrate mobile applications with REST APIs and backend services. Implement secure authentication and authorization mechanisms. Optimize application performance, responsiveness, and battery usage.

Troubleshoot and resolve production issues. Collaborate with product, design, backend, QA, and DevOps teams. Participate in code reviews and engineering best practices. Publish and maintain applications on Google Play Store and Apple App Store.

Requirements

Technical Requirements Mobile Development Strong proficiency in Flutter and Dart. Experience building and deploying production Flutter applications. Strong understanding of mobile application architecture. Experience with state management solutions such as: Bloc Cubit Provider Riverpod API & Integration REST API integration.

JSON serialization and parsing. Secure API consumption. WebSocket and real-time communication experience is an advantage. Mobile Security JWT Authentication. Biometric Authentication. Device Binding. Secure Local Storage. Certificate Pinning. Mobile Application Security Best Practices. Performance & Quality Unit Testing.

Widget Testing. Integration Testing. Debugging and Performance Optimization. Crash Monitoring and Analytics. Platform Knowledge Android Development Fundamentals. iOS Development Fundamentals. Play Store and App Store Release Management. CI/CD for Mobile Applications. Tools & Technologies Flutter Dart Git Firebase FCM Push Notifications Google Maps Integration Deep Linking App Links / Universal Links Financial Services Experience (Preferred) Experience developing one or more of the following: Digital Banking Applications Mobile Wallets Agency Banking Applications Lending Platforms Payment Applications FinTech Solutions Nice to Have Face Recognition and Liveness Detection.

NFC and QR Code Payments. Offline-First Mobile Applications. Background Services. Mobile Analytics and Monitoring. Flutter Web. Native Android (Kotlin/Java) or iOS (Swift) knowledge.

Qualifications

B.Eng/B.Sc in Computer Science, Computer Engineering, Electrical & Electronics Engineering, Information Technology, or related discipline. 4+ years of professional software development experience. Proven experience delivering mobile applications to production.

Benefits

Industry Standard

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