Software Development
open
Posted Jan 25, 2026
Are you passionate about building high-quality mobile applications that deliver exceptional user experiences? iorUp is looking for a Senior Mobile Developer to lead the development of innovative mobile solutions and contribute to the growth of our digital products.
As a remote role, you will collaborate with product managers, designers, backend developers, and fellow engineers to architect, develop, and maintain scalable mobile applications while ensuring performance, reliability, and maintainability.
Job Requirements
- Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field.
- Minimum 5 years of professional experience in mobile application development.
- Minimum 3 years of hands-on experience with Flutter and Dart.
- Strong understanding of mobile application architecture and design patterns.
- Experience integrating RESTful APIs, GraphQL APIs, and third-party services.
- Proficiency with state management solutions such as Riverpod, Provider, Bloc, or similar.
- Experience with Firebase services including Authentication, Firestore, Analytics, and Cloud Messaging.
- Strong understanding of iOS and Android platform guidelines and best practices.
- Experience optimizing application performance and memory usage.
- Knowledge of mobile security best practices and secure coding standards.
- Experience with Git, code reviews, and collaborative development workflows.
- Familiarity with CI/CD pipelines and mobile application deployment processes.
- Strong problem-solving, debugging, and analytical skills.
- Experience mentoring junior developers and providing technical leadership.
- Japanese language proficiency is a plus.
Job Descriptions / Responsibilities
- Design, develop, and maintain high-quality mobile applications using Flutter.
- Lead technical discussions and contribute to architectural decisions.
- Collaborate with product managers, designers, and backend developers to deliver product features.
- Write clean, scalable, maintainable, and well-documented code.
- Optimize application performance, responsiveness, and user experience.
- Review code and mentor junior and mid-level developers.
- Troubleshoot and resolve complex technical issues across multiple platforms.
- Implement automated testing and maintain code quality standards.
- Integrate APIs, payment gateways, and third-party mobile services.
- Manage application releases to Apple App Store and Google Play Store.
- Participate in sprint planning, estimation, and technical roadmap discussions.
- Stay up to date with mobile development trends, tools, and best practices.
- Contribute to continuous improvement of engineering processes and development standards.
Working Conditions
- Working Hours: 9:00 AM - 6:00 PM (1-hour lunch break).
- Working Days: 5 days a week (Weekdays or weekends depending on project requirements).
How to apply
If you're passionate about building impactful mobile applications, leading technical initiatives, and helping teams deliver exceptional products, we'd love to hear from you! Email: contact@iorup.com