Senior Mobile Application Developer (Flutter / iOS)

SANDBOX INNOVATION SDN. BHD.; Kuala Lumpur; On-site; MYR 200,000 - 250,000; Full time

Job summary

A technology innovation company in Kuala Lumpur is seeking a Senior Mobile Developer to take ownership of mobile application development using Flutter. The role involves enhancing and maintaining mobile apps, collaborating closely with backend and product teams, and ensuring code quality. The ideal candidate has over 4 years of experience in mobile development and strong problem-solving skills. This is an opportunity to work on real-world products in a dynamic environment.

Qualifications

• 4+ years of experience in mobile application development.
• Strong hands-on experience with Flutter.
• Experience working with REST APIs and Firebase.
• Good knowledge of mobile app architecture and best practices.

Responsibilities

• Develop, maintain, and enhance mobile applications using Flutter.
• Collaborate closely with backend and product teams.
• Debug, troubleshoot, and optimise mobile application performance.
• Support and mentor junior developers when needed.

Skills

Flutter

iOS development

REST APIs

Firebase

Git

Problem-solving

Communication

Job description

We’re looking for a Senior Mobile Developer who takes ownership of their work, writes clean code, and enjoys building reliable mobile products used in real-world, production environments.

Responsibilities

• Develop, maintain, and enhance mobile applications using Flutter.
• Build and manage iOS applications, including TestFlight distribution and App Store release workflows.
• Collaborate closely with backend and product teams to deliver production-ready mobile solutions.
• Write clean, maintainable, and well‑tested code.
• Debug, troubleshoot, and optimise mobile application performance.
• Participate in code reviews and contribute to improving engineering standards.
• Support and mentor junior developers when needed.

We work fast, expect quality, and appreciate developers who think before they execute.

Requirements

• 4+ years of experience in mobile application development.
• Strong hands‑on experience with Flutter.
• Solid understanding of iOS development, including App Store submission processes.
• Experience working with REST APIs, Firebase, and push notifications.
• Good knowledge of mobile app architecture and best practices.
• Experience using Git and version control workflows.
• Strong problem‑solving skills and clear communication.
• Self‑managed and able to take ownership of end‑to‑end delivery.

Bonus Skills

• Experience with cross‑platform deployment.
• Knowledge of CI/CD pipelines for mobile applications.

Why Join Us

• Work on real-world systems where reliability and correctness matter.
• Build products operating in complex, high‑stakes environments.
• Develop transactional, user‑facing applications used in live production.
• Gain exposure to systems requiring scalability and long‑term maintainability.
• Work in an environment that values engineering judgement, not just speed.
• Take real ownership — your work directly shapes the product.

How to Apply

Please include your resume, GitHub or portfolio link, and a short introduction about your experience.

Unlock job insights

Your application will include the following questions:

• Which of the following statements best describes your right to work in Malaysia?
• What's your expected monthly basic salary?
• Which of the following types of qualifications do you have?
• How many years' experience do you have as a Mobile Application Developer?
• How many years' experience do you have as a Mobile Developer?
• How many years of iOS development experience do you have?
• Which of the following languages are you fluent in?
• How much notice are you required to give your current employer?