Full Stack Mobile Engineer (Mobile & Backend)

CoinWorldCap; Kuala Lumpur; On-site; MYR 90,000 - 130,000; Full time

Job summary

CoinWorldCap Kuala Lumpur seeks a skilled Full Stack Mobile Developer (Flutter) with 3–5 years of experience to join our engineering team and build high-quality mobile applications for Android and iOS as a full stack engineer.

You will collaborate with designers, product managers, and backend engineers to deliver scalable features, ensure performance, and maintain robust code, tests, and deployment workflows across platforms.

Qualifications

• 3–5 years of Flutter development experience.
• Experience delivering mobile apps for iOS and Android.
• Proficiency in Dart and MVVM architecture.
• Backend experience with Golang, NodeJS or Java.
• Experience with WebSocket real-time applications.
• Familiar with storage technologies (SQLite, MySQL).
• Experience with performance profiling and memory optimization.

Responsibilities

• Design, develop, and maintain cross-platform mobile applications using Flutter.
• Build clean, reusable, and maintainable code following best practices.
• Integrate RESTful APIs, WebSocket, and third-party SDKs.
• Optimize application performance, stability, and user experience.
• Troubleshoot, debug, and resolve application issues.
• Write unit tests and participate in code reviews.
• Publish and maintain applications on Google Play and Apple App Store.
• Continuously improve development processes and application architecture.

Skills

Flutter

Dart

MVVM

RESTful APIs

WebSocket

Backend languages (Golang/NodeJS/Java)

SQLite

MySQL

Performance profiling

Tools

SQLite

MySQL

Job description

We are looking for a talented Full Stack Mobile Developer (Flutter) with 3–5 years of experience to join our engineering team. You will be responsible for developing and maintaining high-quality mobile applications for Android and iOS, as a full stack engineer, collaborating with engineers, designers, and product managers to deliver scalable and user-friendly products.

Key Responsibilities

• Design, develop, and maintain cross-platform mobile applications using Flutter.
• Build clean, reusable, and maintainable code following best practices.
• Integrate RESTful APIs, WebSocket, and third-party SDKs.
• Optimize application performance, stability, and user experience.
• Troubleshoot, debug, and resolve application issues.
• Write unit tests and participate in code reviews.
• Publish and maintain applications on Google Play and Apple App Store.
• Continuously improve development processes and application architecture.

Requirements

• 3–5 years of professional Flutter development, building mobile applications for iOS and Android.
• Strong proficiency in Dart and familiarity with MVVM architecture.
• Experience with Golang, NodeJS or Java backend development.
• Experience with WebSocket real-time applications.
• Familiar with storage technologies (SQLite, MySQL).
• Experience with performance profiling and memory optimization.

Nice to Have

• Experience in building custom presets or workflows for AI coding agents (e.g., Claude Code, Codex).