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I'm a Senior Android Developer with 7+ years of experience building scalable mobile applications for fintech, health care, and consumer markets. I've led development teams, implemented clean architecture patterns, and delivered high-performance apps with 5M+ downloads. I'm proficient in modern Android development with Kotlin and Compose, and I enjoy integrating crypto and real-time data services. I value collaboration with product and health-care professionals to deliver secure, reliable software that users love.…I'm a Senior Android Developer with 7+ years of experience building scalable mobile applications for fintech, health care, and consumer markets. I've led development teams, implemented clean architecture patterns, and delivered high-performance apps with 5M+ downloads. I'm proficient in modern Android development with Kotlin and Compose, and I enjoy integrating crypto and real-time data services. I value collaboration with product and health-care professionals to deliver secure, reliable software that users love.

Thomas Constantin

Developer, App Developer, Blockchain Developer, +3

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I'm a Senior Android Developer with 7+ years of experience building scalable mobile applications for fintech, health care, and consumer markets. I've led development teams, implemented clean architecture patterns, and delivered high-performance apps with 5M+ downloads. I'm proficient in modern Android development with Kotlin and Compose, and I enjoy integrating crypto and real-time data services. I value collaboration with product and health-care professionals to deliver secure, reliable software that users love.…I'm a Senior Android Developer with 7+ years of experience building scalable mobile applications for fintech, health care, and consumer markets. I've led development teams, implemented clean architecture patterns, and delivered high-performance apps with 5M+ downloads. I'm proficient in modern Android development with Kotlin and Compose, and I enjoy integrating crypto and real-time data services. I value collaboration with product and health-care professionals to deliver secure, reliable software that users love.

Available to hire

I’m a Senior Android Developer with 7+ years of experience building scalable mobile applications for fintech, health care, and consumer markets. I’ve led development teams, implemented clean architecture patterns, and delivered high-performance apps with 5M+ downloads.

I’m proficient in modern Android development with Kotlin and Compose, and I enjoy integrating crypto and real-time data services. I value collaboration with product and health-care professionals to deliver secure, reliable software that users love.

Skills

Experience Level

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Javanese

Advanced

Amharic

Intermediate

English

Fluent

Italian

Fluent

Work Experience

Lead Android Developer at Bity

November 1, 2022 - Present

Led development of the Bity Wallet cryptocurrency application, architecting scalable solutions using Clean Architecture principles. Implemented multi-currency support for Bitcoin, Litecoin, ICP, ERC20 and Arbitrum tokens, enabling secure digital asset management. Migrated legacy UI to Jetpack Compose, reducing code complexity by 30% and improving development velocity. Developed an open-source cryptocurrency library used by multiple blockchain projects. Integrated Firebase services for real-time data synchronization and push notifications. Established comprehensive testing strategy including unit, integration, and automated UI testing.

Software Engineer at Onward

November 1, 2022 - August 22, 2025

Architected medical device communication system using Bluetooth GATT protocol for real-time health monitoring. Achieved 98% test coverage using JaCoCo, Mockito, and Cucumber. Implemented automated testing pipeline reducing manual testing time by 60%. Collaborated with healthcare professionals to ensure regulatory compliance and user safety standards.

Software Engineer at Flyability

February 1, 2022 - August 22, 2025

Developed drone control application enabling real-time communication between drone, radio controller, and tablet interface. Implemented HD video streaming with low-latency processing for industrial inspection use cases. Built comprehensive unit testing suite and custom Android views for specialized drone controls. Integrated Azure CI/CD pipeline for automated testing and deployment.

Software Engineer at Deltatre

December 1, 2021 - August 22, 2025

Built advanced Android media library supporting sports event streaming across multiple platforms. Developed 360-degree video player and comprehensive documentation for API implementation. Integrated multi-platform analytics (Google Analytics, Conviva, Akamai) providing detailed user engagement metrics. Enabled cross-device compatibility for Android TV, tablets, and Chromecast devices. Implemented REST API integration using Retrofit for dynamic content management.

Android Developer at Certimeter

June 1, 2020 - August 22, 2025

Developed major Italian banking application with over 5 million downloads, implementing secure payment processing. Built document scanning and OCR system using camera APIs to extract payment information and automate transactions. Implemented MVVM architecture with Navigation Component and AndroidX libraries. Established Jenkins CI/CD pipeline for automated builds and testing. Integrated Google Maps API for branch location services. Developed secure messaging application for government and enterprise clients requiring end-to-end encrypted communications. Implemented custom cryptographic algorithms for secure voice calls and instant messaging using proprietary Telsy encryption protocols. Integrated native cryptography libraries using JNI to leverage high-performance C/C++ crypto implementations. Built secure VoIP calling system with military-grade encryption ensuring Common Criteria security compliance for classified information handling.

Lead Android Developer

November 2, 2022 - Present

Led development of a cryptocurrency wallet application, architecting scalable solutions using Clean Architecture. Implemented multi-currency support for Bitcoin, ICP, ERC-20 and Arbitrum, enabling secure digital asset management. Migrated legacy UI to Jetpack Compose. Developed an open-source cryptocurrency library used by multiple blockchain projects. Integrated Firebase services for real-time data synchronization and push notifications. Established a comprehensive testing strategy including unit tests, integration tests, and automated UI tests.

Android Developer at Paudex

December 2, 2021 - February 2, 2022

Remote role focusing on secure, real-time mobile experiences. Advanced Android media libraries supporting sports event streaming across multiple platforms. Developed 360-degree video player and comprehensive API documentation for implementation. Integrated multi-platform analytics (Google Analytics, Amakai), enabling detailed user engagement metrics. Ensured cross-device compatibility for Android TV, tablets, and Chromecast devices. Implemented REST API integration using Retrofit for dynamic content management.

Android Developer at Remote

June 2, 2020 - December 2, 2021

Remote Jun 2020 - Dec 2021: Developed secure messaging and real-time communication features for government and enterprise clients. Built custom cryptographic algorithms for secure voice calls and instant messaging using proprietary TLS protocols. Integrated native cryptography libraries via JNI to leverage high-performance C/C++ implementations. Built a secure VoIP system with encryption and ensured compliance with security standards. Implemented CI/CD pipelines and documentation for API usage.

Android Developer

September 2, 2018 - June 2, 2020

Turin Sep 2018 - Jun 2020: Developed secure messaging app for government and enterprise clients requiring end-to-end encrypted communications. Implemented custom cryptographic algorithms for secure voice calls and instant messaging using proprietary TLS protocols. Integrated native cryptography libraries using JNI to achieve high-performance cryptographic operations.