Derex Technologies Inc specializes in providing IT consulting, staffing solutions and software services. Globally headquartered in Harrison New Jersey since 1996 Derex delivers the highest quality technology professionals and an array of customized IT talent solutions designed to improve productivity and drive results to global clients throughout North America.

With over two decades of unparalleled experience, Derex provides supports to its clientele, across such industries as Systems Integration, Banking and Finance, Telecommunications, Pharmaceutical and Life Sciences, Energy, Healthcare, Technology, Transportation, and local and federal Government agencies.

Job Title : Sr. Mobile Developer

Location : San Antonio TX - Day 1 Onsite

Contract – Long term

Primary Skills : Kotlin, Swift, SpringBoot (Preferred)

About the Job:

We are seeking a talented Mobile App Development Engineer to join our engineering team in building and maintaining innovative mobile applications for iOS and Android platforms. The engineer will focus on writing clean, efficient code, implementing features, and ensuring high-quality deliverables in a fast-paced environment. This role is a complete hands-on development responsibility. The ideal candidate must possess a diverse skill set to tackle the challenges of app development effectively from proficiency in programming languages such as Java, Swift, or Kotlin to expertise in mobile app development frameworks like React Native or Flutter.

Key Responsibilities: 

• Develop and maintain mobile applications using .NET/C#, Java/Kotlin, Swift, or React Native, following clean code principles.
• Implement user interfaces and features based on wireframes, designs, and technical requirements.
• Integrate mobile applications with RESTful APIs, backend services, and third-party libraries (e.g., Firebase, Facebook SDK).
• Write unit and integration tests to ensure code quality and reliability.
• Debug and resolve issues reported by QA or end-users, optimizing for performance and compatibility.
• Collaborate with cross-functional teams (e.g., designers, product managers, backend developers) to deliver user-friendly applications.
• Participate in code reviews to maintain code quality and consistency.
• Stay updated with mobile platform updates, SDKs, and development best practices.
• Contribute to technical documentation, including API usage and feature implementation details.
• Support the application lifecycle, including testing, release, and post-launch maintenance.

Required Skills & Experience: 

• Bachelor’s degree in computer science, Engineering, or a related field (or equivalent experience).
• 8+ years of experience in mobile application development.
• Proficiency in mobile development language/framework (e.g., .NET MAUI, Java/Kotlin, Swift, React Native).
• Familiarity with mobile platform APIs, SDKs, and tools (e.g., Android Studio, Xcode) for both iOS and Android
• Experience with RESTful APIs, JSON, and web services integration.
• Knowledge of UI/UX design principles and platform-specific guidelines.
• Understanding of version control systems (e.g., Git) and basic Agile practices.
• Strong problem-solving skills and attention to detail.
• Ability to work collaboratively in a team environment.

Desired Skills & Experience:

• Experience with cross-platform development frameworks (e.g., Flutter, Xamarin).
• Knowledge of mobile testing tools (e.g., JUnit, XCTest, Jest).
• Familiarity with cloud services (e.g., AWS, Firebase) and CI/CD pipelines.
• Understanding of mobile security practices (e.g., secure storage, API authentication).
• Contributions to released applications on the App Store or Google Play.

Regards,

Manoj

Derex Technologies INC

Contact : 973-834-5005 Ext 206

All your information will be kept confidential according to EEO guidelines.