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Senior Mobile & Full-Stack Engineer with 8+ years of experience building enterprise-grade cross-platform mobile applications and backend systems. Strong expertise in Flutter, REST APIs, JWT/OAuth-style authentication, scalable architecture, and production support. Experienced delivering CI/CD and cloud deployments on AWS, integrating third-party services, and optimizing app performance for iOS and Android. Works effectively with product managers and engineering teams in Agile environments.…Senior Mobile & Full-Stack Engineer with 8+ years of experience building enterprise-grade cross-platform mobile applications and backend systems. Strong expertise in Flutter, REST APIs, JWT/OAuth-style authentication, scalable architecture, and production support. Experienced delivering CI/CD and cloud deployments on AWS, integrating third-party services, and optimizing app performance for iOS and Android. Works effectively with product managers and engineering teams in Agile environments.

Franck Dabryn Siyapze

Full Stack Developer, Web Developer, App Developer, +2

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Senior Mobile & Full-Stack Engineer with 8+ years of experience building enterprise-grade cross-platform mobile applications and backend systems. Strong expertise in Flutter, REST APIs, JWT/OAuth-style authentication, scalable architecture, and production support. Experienced delivering CI/CD and cloud deployments on AWS, integrating third-party services, and optimizing app performance for iOS and Android. Works effectively with product managers and engineering teams in Agile environments.…Senior Mobile & Full-Stack Engineer with 8+ years of experience building enterprise-grade cross-platform mobile applications and backend systems. Strong expertise in Flutter, REST APIs, JWT/OAuth-style authentication, scalable architecture, and production support. Experienced delivering CI/CD and cloud deployments on AWS, integrating third-party services, and optimizing app performance for iOS and Android. Works effectively with product managers and engineering teams in Agile environments.

Available to hire

Senior Mobile & Full-Stack Engineer with 8+ years of experience building enterprise-grade cross-platform mobile applications and backend systems. Strong expertise in Flutter, REST APIs, JWT/OAuth-style authentication, scalable architecture, and production support.

Experienced delivering CI/CD and cloud deployments on AWS, integrating third-party services, and optimizing app performance for iOS and Android. Works effectively with product managers and engineering teams in Agile environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

French

Advanced

Work Experience

Senior Full Stack & Flutter Developer at Collabox

March 1, 2023 - Present

Developed and maintained Flutter modules integrated with enterprise HR/payroll systems (1000+ users). Built backend microservices using Node.js and REST APIs for mobile clients, implementing JWT-based authentication flows. Contributed to scalable, secure architecture for enterprise HR systems and implemented high-availability CI/CD pipelines for automated build, testing, and deployment. Optimized mobile performance and reduced load times by 30%. Debugged production issues across Android and iOS, collaborated with product and backend teams on features, and integrated third-party services such as QuickBooks for billing and financial processing.

Full Stack Developer at Felicity Ltd Co

May 1, 2022 - February 1, 2023

Built cross-platform mobile applications using Flutter with backend integration via Spring Boot REST APIs. Implemented BLoC state management for scalable app architecture. Integrated payment gateways (PayPal, Stripe, Flutterwave) for in-app transactions. Complemented Flutter with native iOS UI components using SwiftUI, worked on Android builds with debugging and performance optimization, and executed unit testing using Flutter testing and JUnit. Supported secure infrastructure environments and deployment workflows using Jenkins and Linux.

Full Stack Developer at GTA Consulting

December 1, 2017 - April 1, 2022

Designed and developed business applications using Flutter and Laravel. Integrated applications with backend systems and third-party services. Created responsive user interfaces from Figma and business mockups, participated in Agile sprints, and supported deployed applications after release.