I’m a developer who specializes in mobile application development with over six years of experience delivering end-to-end solutions for both public institutions and private companies. My strongest expertise lies in Flutter (apps published on Play Store & App Store) and Kotlin/Jetpack Compose, where I design, build, and scale applications following Clean Architecture, SOLID principles, and modern state management (Bloc, GetX, MobX). I’ve worked in public sector projects (two years at the Public Defender’s Office, maintaining and enhancing official mobile apps) and currently in the ERP and payments sector, creating applications from scratch, integrating SiTef payment systems, and developing solutions for self-service kiosks. This combination of sector knowledge and technical depth allows me to bridge critical business needs with clean, maintainable code. What differentiates me from other developers is my ability to work across mobile, backend, and payment ecosystems while keeping a strong focus on user experience and scalable architecture. I thrive on transforming complex requirements into reliable, production-ready applications. Employment and Project Experience Mobile Developer – ERP & Payment Systems Company 2023 – Present Created ERP-integrated mobile applications from the ground up. Implemented payment solutions with SiTef and kiosk automation. Designed scalable architectures applying Clean Code and SOLID principles. Mobile Developer – Public Defender’s Office 2021 – 2023 Maintained and improved official apps used by thousands of users. Delivered secure, reliable mobile features in the public sector. Focused on performance, accessibility, and stability of legacy systems

Osmel Santos

I’m a developer who specializes in mobile application development with over six years of experience delivering end-to-end solutions for both public institutions and private companies. My strongest expertise lies in Flutter (apps published on Play Store & App Store) and Kotlin/Jetpack Compose, where I design, build, and scale applications following Clean Architecture, SOLID principles, and modern state management (Bloc, GetX, MobX). I’ve worked in public sector projects (two years at the Public Defender’s Office, maintaining and enhancing official mobile apps) and currently in the ERP and payments sector, creating applications from scratch, integrating SiTef payment systems, and developing solutions for self-service kiosks. This combination of sector knowledge and technical depth allows me to bridge critical business needs with clean, maintainable code. What differentiates me from other developers is my ability to work across mobile, backend, and payment ecosystems while keeping a strong focus on user experience and scalable architecture. I thrive on transforming complex requirements into reliable, production-ready applications. Employment and Project Experience Mobile Developer – ERP & Payment Systems Company 2023 – Present Created ERP-integrated mobile applications from the ground up. Implemented payment solutions with SiTef and kiosk automation. Designed scalable architectures applying Clean Code and SOLID principles. Mobile Developer – Public Defender’s Office 2021 – 2023 Maintained and improved official apps used by thousands of users. Delivered secure, reliable mobile features in the public sector. Focused on performance, accessibility, and stability of legacy systems

Available to hire

I’m a developer who specializes in mobile application development with over six years of experience delivering end-to-end solutions for both public institutions and private companies. My strongest expertise lies in Flutter (apps published on Play Store & App Store) and Kotlin/Jetpack Compose, where I design, build, and scale applications following Clean Architecture, SOLID principles, and modern state management (Bloc, GetX, MobX).

I’ve worked in public sector projects (two years at the Public Defender’s Office, maintaining and enhancing official mobile apps) and currently in the ERP and payments sector, creating applications from scratch, integrating SiTef payment systems, and developing solutions for self-service kiosks. This combination of sector knowledge and technical depth allows me to bridge critical business needs with clean, maintainable code.

What differentiates me from other developers is my ability to work across mobile, backend, and payment ecosystems while keeping a strong focus on user experience and scalable architecture. I thrive on transforming complex requirements into reliable, production-ready applications.

Employment and Project Experience

Mobile Developer – ERP & Payment Systems Company
2023 – Present

Created ERP-integrated mobile applications from the ground up.

Implemented payment solutions with SiTef and kiosk automation.

Designed scalable architectures applying Clean Code and SOLID principles.

Mobile Developer – Public Defender’s Office
2021 – 2023

Maintained and improved official apps used by thousands of users.

Delivered secure, reliable mobile features in the public sector.

Focused on performance, accessibility, and stability of legacy systems

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Experience Level

Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Beginner
Beginner
Beginner
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Language

English
Intermediate
Portuguese
Fluent

Work Experience

Mobile Developer at Eptus
September 24, 2022 - Present
Mobile Developer at Public Defender’s Office
July 1, 2021 - July 1, 2024
I was responsible for developing and maintaining mobile applications
Mobile Developer at Eptus
September 24, 2022 - Present
I currently work at an ERP company creating new applications, integrating payment systems such as SiTef, and building solutions for self-service kiosks.

Education

Developer Systems at Claretiano
January 1, 2019 - September 3, 2025
Professional training throughout the course, learning concepts, guidelines, and values.
Computer Science at University of Roraima
September 1, 2020 - September 24, 2025

Qualifications

Add your qualifications or awards here.

Industry Experience

Education

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