Senior Mobile Application Developer (Flutter / iOS)

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

Job summary

A leading mobile development firm in Kuala Lumpur is seeking a Senior Mobile Developer. You will develop, maintain, and enhance mobile applications using Flutter while collaborating with backend teams. The ideal candidate has over 4 years of experience in mobile development, particularly with iOS. We're looking for someone who can write clean code, optimize performance, and support junior developers. This role offers the opportunity to work on real-world systems that require reliability and scalability.

Benefits

Exposure to high-stakes environments

Opportunity for ownership in product development

Qualifications

• 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 with REST APIs and push notifications.
• Strong problem-solving skills and clear communication.

Responsibilities

• Develop, maintain, and enhance mobile applications using Flutter.
• Build and manage iOS applications including App Store release workflows.
• Collaborate closely with backend and product teams.
• Write clean, maintainable, and well-tested code.
• Debug and optimise mobile application performance.

Skills

Flutter

iOS development

REST APIs

Firebase

Git and version control

Problem-solving

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.

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.

Application Questions

• What's your expected monthly basic salary?
• 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?