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Hello! I’m Fathona Aji, a passionate full stack developer based in Jakarta, Indonesia. I build scalable web and mobile applications from frontend to backend, using React.js, Kotlin, and JavaScript, with a focus on clean architecture and reliable performance. Over 6+ years as an Android developer, I’ve delivered production-ready platforms for diverse clients, including hospitality and e-commerce, and I enjoy collaborating across cross-functional teams to optimize UX and code quality. I thrive on turning complex requirements into maintainable, high-quality software and I keep a steady eye on performance, testing, and modern development standards.…Hello! I’m Fathona Aji, a passionate full stack developer based in Jakarta, Indonesia. I build scalable web and mobile applications from frontend to backend, using React.js, Kotlin, and JavaScript, with a focus on clean architecture and reliable performance. Over 6+ years as an Android developer, I’ve delivered production-ready platforms for diverse clients, including hospitality and e-commerce, and I enjoy collaborating across cross-functional teams to optimize UX and code quality. I thrive on turning complex requirements into maintainable, high-quality software and I keep a steady eye on performance, testing, and modern development standards.

Fathona Aji

Front-End Developer, Back-End Developer, Full Stack Developer, +2

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Hello! I’m Fathona Aji, a passionate full stack developer based in Jakarta, Indonesia. I build scalable web and mobile applications from frontend to backend, using React.js, Kotlin, and JavaScript, with a focus on clean architecture and reliable performance. Over 6+ years as an Android developer, I’ve delivered production-ready platforms for diverse clients, including hospitality and e-commerce, and I enjoy collaborating across cross-functional teams to optimize UX and code quality. I thrive on turning complex requirements into maintainable, high-quality software and I keep a steady eye on performance, testing, and modern development standards.…Hello! I’m Fathona Aji, a passionate full stack developer based in Jakarta, Indonesia. I build scalable web and mobile applications from frontend to backend, using React.js, Kotlin, and JavaScript, with a focus on clean architecture and reliable performance. Over 6+ years as an Android developer, I’ve delivered production-ready platforms for diverse clients, including hospitality and e-commerce, and I enjoy collaborating across cross-functional teams to optimize UX and code quality. I thrive on turning complex requirements into maintainable, high-quality software and I keep a steady eye on performance, testing, and modern development standards.

Available to hire

Hello! I’m Fathona Aji, a passionate full stack developer based in Jakarta, Indonesia. I build scalable web and mobile applications from frontend to backend, using React.js, Kotlin, and JavaScript, with a focus on clean architecture and reliable performance. Over 6+ years as an Android developer, I’ve delivered production-ready platforms for diverse clients, including hospitality and e-commerce, and I enjoy collaborating across cross-functional teams to optimize UX and code quality. I thrive on turning complex requirements into maintainable, high-quality software and I keep a steady eye on performance, testing, and modern development standards.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Beginner

Beginner

Beginner

Language

Indonesian

Fluent

English

Advanced

Work Experience

Senior Software Developer at MASI TECHNOLOGY

May 1, 2025 - October 13, 2025

Developed scalable Android applications using Kotlin and Jetpack Compose with Clean Architecture, MVVM, Coroutines and Flow; implemented RESTful and WebSocket APIs; built UI components; integrated CI/CD pipelines (GitLab CI, GitHub Actions) and cloud services (AWS S3, Firebase Cloud Functions); led daily scrum meetings; monitored crash analytics to ensure stability; contributed to iOS app development with Flutter for cross-platform content delivery.

Freelance Code Reviewer at PT Digital Apta Media

May 1, 2023 - October 13, 2025

Reviewed and refactored Kotlin-based Android code for performance, readability, and testability; ensured SOLID principles, MVVM architecture, and modern Android standards; identified architectural bottlenecks and proposed improvements.

Full Stack Developer at PT Digital Apta Media

January 31, 2023 - October 13, 2025

Developed various web and mobile applications from frontend to backend; designed administration/CRM systems; implemented REST APIs to support mobile and CMS integration; built Android apps with Kotlin/Java focusing on offline-first capabilities and optimized rendering; applied modular architecture and repository patterns for long-term scalability; collaborated with design, QA, and infrastructure teams to deploy production-ready systems.

Senior Software Developer at MASI Technology

May 1, 2025 - October 13, 2025

Senior Software Developer responsible for designing and implementing scalable Android applications using Kotlin, Jetpack Compose, and Clean Architecture with a focus on MVVM and reactive patterns. Led API integration (REST/gRPC), CI/CD automation, and cloud service usage; collaborated with backend and infra teams; monitored performance and maintained code quality.

Freelance Code Reviewer at PT Digital Apta Media

May 1, 2023 - October 13, 2025

Reviewed and refactored Kotlin-based Android code for performance, readability, and testability; ensured SOLID principles and MVVM architecture; collaborated with developers to resolve architectural bottlenecks.

Full Stack Developer at PT Digital Apta Media

January 1, 2023 - October 13, 2025

Developed various web and mobile applications from frontend to backend, including the design of admin/CMS systems to meet diverse business needs. Built REST APIs to support mobile and CMS integration; designed modular architectures for long-term scalability.

Senior Software Developer at MASI TECHNOLOGY

May 1, 2025 - October 13, 2025

Developed scalable Android applications using Kotlin, Jetpack Compose, and Clean Architecture, focusing on modularity and high performance. Implemented reactive programming with Coroutines, Flow, and RxJava to manage asynchronous operations. Built UI components with XML and Jetpack Compose; integrated RESTful and WebSocket APIs for real-time content delivery; maintained custom UI components and libraries to accelerate development. Ensured code quality via reviews, testing, and documentation. Designed CI/CD pipelines with GitLab CI; collaborated with backend and infrastructure teams to optimize network communication. Led daily Scrum, monitored crashes with Firebase Crashlytics, and supported cross-platform development including iOS with Flutter.

Code Reviewer (Freelance) at PT Digital Apta Media

May 1, 2023 - October 13, 2025

Reviewed Kotlin-based Android code focusing on performance, readability, and testability; ensured SOLID principles, MVVM architecture, and modern Android standards; identified and resolved architectural bottlenecks in collaboration with development teams.

Full Stack Developer at PT Digital Apta Media

January 1, 2023 - October 13, 2025

Developed web and mobile applications from frontend to backend, including admin/CMS systems. Designed and implemented REST APIs to support mobile and CMS integrations. Built Android applications with Kotlin and Java, focusing on offline-first capabilities and optimized rendering. Applied modular architecture and repository pattern for long-term scalability. Collaborated with design, QA, and infrastructure teams to deploy production-ready systems. Implemented backend with PHP (CodeIgniter), frontend with JavaScript/jQuery, and mobile with Java/Kotlin to ensure cohesive user experiences across platforms.

Full Stack Developer / Android Developer at PT Digital Apta Media

June 1, 2018 - January 1, 2023

Built and optimized scalable web and mobile applications from frontend to backend, leveraging Kotlin, Java, PHP (CodeIgniter), and JavaScript (jQuery). Implemented RESTful APIs and modular design to enable seamless integration and maintainable codebases; collaborated with cross-functional teams to deliver production-ready solutions.

Android Developer at PT Digital Apta Media

February 1, 2023 - May 1, 2023

Reviewed and refactored Android application code to boost performance, readability, and testability. Followed SOLID principles, MVVM architecture, and modern Android standards; worked with teammates to maintain scalable, high-quality codebases.

Android Developer at PT Masi Technology

February 1, 2023 - May 1, 2025

Built modular Android applications using Kotlin, Jetpack Compose, and Clean Architecture. Proficient with Kotlin coroutines and Flow; delivered responsive UIs and robust API integrations. Maintained code quality via CI/CD, code reviews, and performance monitoring; contributed to cross-platform capability with Flutter-based iOS development.

Full Stack Developer at PT Digital Apta Media

June 1, 2018 - January 1, 2023

Built and optimized web and mobile applications from frontend to backend. Experienced with Kotlin, Java, JavaScript (jQuery), and modern frontend frameworks; designed scalable, high-performance systems with clean architecture and offline-first capabilities. Implemented RESTful APIs and modular design principles to ensure maintainable codebases and smooth integration. Collaborated with cross-functional teams to deliver production-ready solutions aligned with business goals and modern development standards.

Code Reviewer at PT Digital Apta Media

February 1, 2023 - May 1, 2023

Reviewed and refactored application code to enhance performance, readability, and testability. Ensured alignment with SOLID principles, MVVM architecture, and modern Android development standards. Identified and resolved architectural bottlenecks to maintain scalable and efficient codebases in collaboration with fellow developers.