Biruk Tsegaye

Senior Mobile Developer | Flutter & Android

Salary / Daily rate

Rotterdam, Netherlands

Freelance

Remote only

Skills

FlutterKotlinMobile DevelopmentAndroidTest Driven DevelopmentClean CodeTest DesignFrontend DevelopmentFullstack DevelopmentJavaTesting & QAFigma

Languages

AmharicEnglish

About me

Intro

Senior Mobile Developer with 6+ years building secure fintech applications using Flutter, Kotlin, and React. Delivered cross-platform apps serving thousands of users, optimized performance by 40%+, and managed full development lifecycles. Specialized in Flutter/native Android development with proven expertise in scalable architecture and seamless API integrations.

Links

Work experience

FINBIT®

May 2021 - Present

5 years 6 months

Netherlands · Hybrid

Senior Mobile Developer

Jan 2022 - Present

4 years 10 months

Netherlands · Hybrid

- Developed secure, cross-platform fintech mobile applications using Flutter, delivering consistent experiences across Android and iOS. - Contributed to native Android development (Kotlin) for critical features requiring platform-specific optimization. - Integrated third-party tools and APIs including Firebase, Twilio, Google SDK, and financial data providers, enhancing app functionality and user experience. - Collaborated with designers to implement scalable, intuitive UI components using Jetpack Compose and Flutter widgets. - Optimized app performance through memory profiling, background service management, and build system tuning (AGP, Gradle). - Actively participated in code reviews, architecture discussions, and cross-team planning to maintain clean code and modular design. - Managed the full development lifecycle from concept to release, contributing to rapid delivery and positive user feedback.

Frontend Engineer (Remote)

May 2021 - Jan 2022

9 months

Remote, OR 97458, USA

- Played a key role in the development of a web portal using React, ensuring seamless integration with back-end systems and third-party APIs for efficient data management and processing. - Collaborated closely with the design team to translate UI/UX designs into fully functional React components, resulting in visually appealing and intuitive user interfaces that enhanced overall user experience and engagement. - Working with React Hooks for state management, effectively handling data flow and ensuring a smooth and consistent user interface across multiple application screens. - Optimized website performance through code refactoring and the use of React performance tools, resulting in significantly improved loading times and overall application responsiveness. - Integrated and consumed RESTful APIs using React's built-in fetch functionality, enabling efficient data retrieval and manipulation for various application features and functionalities. - Successfully developed and launched the current company website, showcasing the company's products and services effectively.

Android Developer

LIFT-BV

Oct 2018 - May 2021

2 years 8 months

Remote, OR 97458, USA

- Designed and developed robust native Android applications using Java and Kotlin, improving user experience and reliability across fintech and business-focused apps. - Built and maintained modular, scalable architectures using MVVM and Clean Architecture patterns, enabling faster development and easier maintenance. - Integrated third-party services (Firebase, REST APIs, Google Maps SDK, Push Notifications) to extend app capabilities and enhance user interaction. - Focused on UI/UX excellence, collaborating with product designers to deliver visually polished and intuitive interfaces using Material Design principles and custom components. - Diagnosed and resolved complex production issues using Android Studio Profiler, Crashlytics, and log analysis, improving stability and reducing crash rates.


Education

Addis Ababa University

Bachelor's degree

2013 - 2018

4 years 11 months

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