Usama Nisar

Freelance Mobile App Developer

Fiverr • Freelance

Dec 2019 - Present • 6 yrs 11 mos

As a Level 2 Seller and Freelance Flutter Developer on Fiverr, my professional journey is driven by a strong track record of accomplishments. My key responsibilities and achievements include: ✓ Developing and delivering high-quality mobile applications using Flutter that consistently meet and exceed client expectations. ✓ Understanding diverse client requirements and collaborating closely with clients to deliver customized solutions tailored to their specific needs. ✓ Managing multiple projects simultaneously and delivering them within agreed timelines while maintaining high standards of quality and precision. ✓ Building long-term client relationships through reliable service, effective communication, positive feedback, and excellent ratings. ✓ Following mobile development best practices, including clean code, performance optimization, application security, and maintainable architecture. ✓ Continuously learning and adopting the latest mobile development trends, tools, and technologies to provide modern and efficient solutions. ✓ Maintaining a strong presence on Fiverr by attracting new clients, building lasting professional relationships, and encouraging repeat business. ✓ Applying strong communication, problem-solving, and project management skills to ensure smooth collaboration and successful project delivery. My Level 2 Seller status on Fiverr reflects my commitment to client satisfaction, service excellence, and consistently delivering high-quality solutions. I continue to leverage my expertise in Flutter development and freelance collaboration to deliver successful mobile applications across diverse industries.

Senior Mobile App Developer

Veroke • Full-time

Nov 2024 - Oct 2026 • 1 yr 11 mos

As a Senior Mobile App Developer, my role encompassed the following responsibilities: ✓ Developed and maintained production-grade Fintech Flutter applications for Saudi Arabia, delivering features for card servicing, payments, account management, and installment plans. ✓ Applied Clean Architecture, SOLID principles, GetX, and dependency injection to build scalable, maintainable, and testable mobile solutions. ✓ Integrated RESTful APIs using Dio and implemented robust data handling, authentication, session management, and biometric security features. ✓ Built seamless bilingual experiences with Arabic/English localization, RTL layouts, and localized date handling. ✓ Improved application reliability through unit testing with Mockito, production debugging, and issue resolution using Firebase Crashlytics. ✓ Leveraged AI-assisted development tools to accelerate implementation, improve code quality, and optimize engineering workflows. ✓ Collaborated with backend engineers, QA teams, and cross-functional stakeholders to deliver reliable features and support production releases.

Senior Mobile App Developer

9D Technologies • Full-time

Jul 2022 - Sep 2024 • 2 yrs 2 mos

As a Senior Flutter Developer and Technical Team Lead at 9D Technologies, my responsibilities encompassed: ✓ Designed, developed, and maintained high-quality Flutter applications. ✓ Led and mentored a team of junior Flutter developers, providing technical guidance and support. ✓ Conducted code reviews to ensure code quality, maintainability, and adherence to best practices. ✓ Collaborated with cross-functional teams to identify requirements and implement innovative solutions. ✓ Managed project timelines and resource allocation to ensure successful and timely project delivery.