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Hi, I’m Md Moontasirul Islam, a Senior Android Engineer with 10+ years of hands-on experience delivering secure, scalable mobile solutions for fintech and consumer apps. I specialize in Kotlin, modern Android architectures (MVVM, Jetpack Compose), mobile security, CI/CD automation, release engineering, and cross-functional technical leadership. I’m passionate about building high-performance apps, reducing technical debt, and mentoring mobile teams to ship reliable features quickly. In my work, I collaborate closely with product, UX, and backend teams to design resilient APIs, optimize user experience, and drive data-driven improvements. I value clean code, proactive QA, and secure coding practices that protect users and business interests.…Hi, I’m Md Moontasirul Islam, a Senior Android Engineer with 10+ years of hands-on experience delivering secure, scalable mobile solutions for fintech and consumer apps. I specialize in Kotlin, modern Android architectures (MVVM, Jetpack Compose), mobile security, CI/CD automation, release engineering, and cross-functional technical leadership. I’m passionate about building high-performance apps, reducing technical debt, and mentoring mobile teams to ship reliable features quickly. In my work, I collaborate closely with product, UX, and backend teams to design resilient APIs, optimize user experience, and drive data-driven improvements. I value clean code, proactive QA, and secure coding practices that protect users and business interests.

Md Moontasirul Islam

Developer, Programmer, Full Stack Developer, +2

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Hi, I’m Md Moontasirul Islam, a Senior Android Engineer with 10+ years of hands-on experience delivering secure, scalable mobile solutions for fintech and consumer apps. I specialize in Kotlin, modern Android architectures (MVVM, Jetpack Compose), mobile security, CI/CD automation, release engineering, and cross-functional technical leadership. I’m passionate about building high-performance apps, reducing technical debt, and mentoring mobile teams to ship reliable features quickly. In my work, I collaborate closely with product, UX, and backend teams to design resilient APIs, optimize user experience, and drive data-driven improvements. I value clean code, proactive QA, and secure coding practices that protect users and business interests.…Hi, I’m Md Moontasirul Islam, a Senior Android Engineer with 10+ years of hands-on experience delivering secure, scalable mobile solutions for fintech and consumer apps. I specialize in Kotlin, modern Android architectures (MVVM, Jetpack Compose), mobile security, CI/CD automation, release engineering, and cross-functional technical leadership. I’m passionate about building high-performance apps, reducing technical debt, and mentoring mobile teams to ship reliable features quickly. In my work, I collaborate closely with product, UX, and backend teams to design resilient APIs, optimize user experience, and drive data-driven improvements. I value clean code, proactive QA, and secure coding practices that protect users and business interests.

Available to hire

Hi, I’m Md Moontasirul Islam, a Senior Android Engineer with 10+ years of hands-on experience delivering secure, scalable mobile solutions for fintech and consumer apps. I specialize in Kotlin, modern Android architectures (MVVM, Jetpack Compose), mobile security, CI/CD automation, release engineering, and cross-functional technical leadership. I’m passionate about building high-performance apps, reducing technical debt, and mentoring mobile teams to ship reliable features quickly.

In my work, I collaborate closely with product, UX, and backend teams to design resilient APIs, optimize user experience, and drive data-driven improvements. I value clean code, proactive QA, and secure coding practices that protect users and business interests.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Advanced

Japanese

Beginner

Work Experience

Principal Software Engineer – Android at Ascend Money

March 1, 2023 - Present

Led Android development for multi-country app deployments using a unified Kotlin codebase, accelerating release cycles and reducing regional maintenance overhead. Architected and improved mobile infrastructure (modularization, scalable data layers, optimized build pipelines). Strengthened fintech-grade security by implementing Play Integrity API, root/jailbreak detection, anti-debugging, and secure coding practices — reducing vulnerability reports by 40%. Collaborated with backend teams to design high-performing REST APIs, improving request efficiency and reducing app/server communication failures. Reduced backlog bugs from 300+ to <100 by leading structured triaging, crash analytics reviews, and automated regression verification.

Senior Software Engineer – Mobile App at JRF Intelligence Limited

October 1, 2021 - February 1, 2023

Led an international team to deliver secure and scalable global remittance and payments apps across multiple regions. Designed and built a cross-platform Kotlin/Flutter architecture, reducing development and maintenance costs by ~30%. Enforced secure coding standards and compliance frameworks, improving app reliability and reducing fintech audit issues. Implemented CI/CD pipelines and automated release workflows, shortening QA-to-release cycles by 50%. Partnered with backend teams to design REST APIs focused on performance, resiliency, and ease of integration for mobile clients. Boosted user engagement by collaborating with Product/UX to refine flows using analytics-driven insights.

Senior Software Engineer – Android at DreamOnline Limited

September 1, 2019 - September 1, 2021

Developed Android apps for smartphones and smartwatches using Kotlin, Java, MVVM/MVP, and RESTful APIs (Google Fit, Fitbit, Firebase). Built scalable core architecture and reusable components for cross-device and multi-platform compatibility. Improved performance through memory analysis, screen fragmentation support, and end-to-end optimization. Collaborated with UI/UX and QA teams to deliver user-friendly, high-quality apps across Android and iOS platforms. Recognized as Best Developer and Best Team Player for outstanding contributions.

Android Engineer at Atom AP Limited

November 1, 2016 - August 1, 2019

Developed and maintained Android apps using Kotlin, Java; integrated Biometric SDKs, Google Maps, and in-app purchases. Improved app reliability and performance through unit/integration tests and legacy code optimization. Contributed to AI features like face/object recognition using TensorFlow, OpenCV, and YOLOv3 to enable smart device functionality.

Android Developer at Twister Media Technology Limited

February 8, 2016 - October 30, 2016

Built and deployed Android applications using Java and MVP architecture with focus on performance and robustness. Integrated third-party APIs, automated unit testing, and deep debugging to improve stability. Enhanced feature usability and reduced crash reports through iterative performance optimizations.