Vahagn G.

Talk360 is an international calling application used by millions worldwide to make low-cost calls without requiring internet access on the receiver’s end.

• Contributed to the development and long-term maintenance of a high-traffic Android application serving a global user base with strict reliability and performance requirements.
• Implemented and improved core Android features related to calling flows, user onboarding, and account management using Java and Kotlin.
• Worked closely with product managers and designers to translate business requirements into scalable, user-friendly mobile solutions.
• Integrated backend services and third-party APIs to support real-time communication, payments, and user verification workflows.
• Focused on application stability by debugging production issues, reducing crash rates, and optimizing performance across a wide range of Android devices.

Mooncascade is a European software consultancy delivering high-quality digital products for startups and enterprise clients across fintech, mobility, and consumer platforms.

• Designed, developed, and maintained production-grade Android applications used by thousands of end users, following clean architecture and modern Android best practices.
• Implemented complex UI/UX flows with a focus on performance, usability, and visual consistency across devices and OS versions.
• Integrated third-party SDKs, REST APIs, and internal backend services, ensuring secure data exchange and reliable synchronization.
• Conducted debugging, performance profiling, and regression testing to ensure application stability under real-world usage.
• Contributed to code reviews, architectural discussions, and continuous improvement of Android development standards within the team.
• Stayed up to date with Android platform changes, libraries, and tooling to improve delivery quality and developer efficiency.

Paxful is a global peer-to-peer cryptocurrency marketplace enabling users to buy, sell, and trade digital assets worldwide.

• Developed and maintained Android applications for a large-scale cryptocurrency platform with strict security and reliability requirements.
• Implemented new product features using Kotlin and Java while ensuring backward compatibility and long-term maintainability.
• Integrated third-party services and internal APIs to support payments, identity verification, and real-time updates.
• Improved application stability through systematic testing, bug fixing, and performance optimization.
• Worked with backend engineers to ensure seamless integration with distributed systems and blockchain-related services.

RebelRoam provides global eSIM-based connectivity solutions for international travelers.

• Designed and developed high-quality, scalable, and maintainable Android applications using Java and Kotlin.
• Implemented optimized code following industry best practices and design patterns to ensure high performance and reliability.
• Integrated third-party APIs and libraries to enhance functionality and deliver seamless user experiences.
• Conducted comprehensive testing and debugging, identifying and resolving issues to ensure application stability and performance.
• Worked closely with backend engineers to integrate Android applications with server-side APIs and databases, ensuring smooth data exchange and synchronization.

DIVI Grupa is a technology company delivering digital solutions for enterprise clients in the Baltic region.

• Developed and maintained Android applications for DIVI Grupa within tight project timelines.
• Implemented clean and efficient code using Java and Kotlin, following coding standards and best practices to ensure high-quality and performant applications.
• Integrated third-party APIs, libraries, and services to expand functionality and improve user experience.
• Performed testing and debugging to identify and resolve issues, ensuring application stability and performance.
• Worked closely with UX/UI designers to implement intuitive and visually consistent user interfaces aligned with company branding.
• Collaborated with backend engineers to integrate Android applications with server-side APIs, ensuring reliable data exchange and synchronization.

• Collaborated with clients and project teams to gather requirements and translate them into technical specifications for mobile app development;

• Designed and implemented high-quality and user-friendly mobile applications, adhering to coding standards and best practices;

• Utilized programming languages such as Java, Kotlin, Swift, and Objective-C to develop mobile applications across different platforms;

• Integrated third-party APIs and services into mobile applications, enhancing functionality and providing seamless user experiences;

• Conducted comprehensive testing and debugging of mobile applications, identifying and resolving issues to ensure optimal performance and stability.

Citymobil is a ride-hailing platform serving millions of users in urban transportation.

• Developed and maintained Android applications for Citymobil, a leading ride-hailing service company;

• Collaborated with cross-functional teams, including product managers and designers, to gather requirements and translate them into technical specifications for Android app development;

• Implemented clean and efficient code using Java and Kotlin, following coding standards and best practices to ensure high-quality and performant Android applications;

• Integrated third-party APIs, libraries, and services into Android applications to enhance functionality and provide seamless user experiences;

• Conducted thorough testing and debugging of Android applications, identifying and resolving issues to ensure optimal performance and stability.

• Assisted in troubleshooting and resolving technical issues, providing support to end-users and stakeholders to ensure smooth operation of Android applications;

• Documented technical specifications, project requirements, and development processes to facilitate knowledge sharing and maintain a well-documented codebase;

• Actively participated in team meetings and discussions, contributing ideas and insights to improve development processes and foster collaboration within the team;

• Keep updated with the latest Android development trends and advancements, continuously exploring new technologies and tools to enhance productivity and efficiency;

• Collaborated with QA engineers and project managers to ensure successful project delivery and effective communication throughout the development lifecycle;

• Contributed to the successful delivery of Android projects, meeting project timelines and client expectations while maintaining high quality.

• Integrated third-party APIs and services into websites to enhance functionality and provide seamless user experiences;

• Conducted thorough testing and debugging of websites, identifying and resolving issues to ensure optimal performance and functionality;

• Collaborated closely with designers to implement their visual concepts and ensure proper alignment with branding and guidelines;

• Assisted in troubleshooting and resolving technical issues, providing support to end-users and stakeholders to ensure smooth operation of websites;

• Documented technical specifications, project requirements, and development processes to facilitate knowledge sharing and maintain a well-documented codebase;

• Actively participated in team meetings and discussions, contributing ideas and insights to improve development processes and foster collaboration within the team.