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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Mobile Developer (iOS / Android) - TS Cleared - **Company:** Seneca Resources - **Location:** Washington, DC, United States - **Experience:** Expert - **Salary:** $216,000.0 - **Contract:** Permanent contract - **Skills:** Flutter, Clean Code Principles, Java (Programming Language), Amazon Web Services, Application Performance Management, App Store (IOS), User Authentication, Microsoft Azure, Mobile Application Development, Software Debugging, Mobile Application Software, Model View Controller (MVC), Model View ViewModel, OAuth, Public Key Infrastructure, Secure Coding, Single Sign-On, Software Engineering, Swiftui, Swift (Programming Language), Backend, Git, Kotlin, Containerization, Information Technology, React Native, Objective C++, Restful APIs, Software Version Control, Devsecops, Microservices - **Published:** June 9, 2026 - **Apply:** https://www.clearancejobs.com/jobs/8963859/senior-mobile-developer-ios-android-ts-cleared ## About the Role Active Top Secret clearance** (required to start). - 7+ years of professional software development experience, with a strong concentration in mobile development. - Demonstrated, hands-on expertise building native mobile applications using Swift / SwiftUI / Objective-C (iOS) and/or **Kotlin / Java (Android). - Proficiency integrating mobile apps with RESTful APIs, microservices, and secure authentication (OAuth, SSO, PKI). - Solid command of mobile architecture patterns (MVVM, MVC), version control (Git), and CI/CD pipelines. - Experience with the full mobile development lifecycle, including testing frameworks, debugging, and App Store / enterprise deployment. - Strong problem-solving skills and the ability to work independently in an onsite, collaborative team setting. - Bachelor's degree in Computer Science, Software Engineering, or a related field (equivalent professional experience considered)., Experience with cross-platform frameworks (React Native, Flutter). - Background developing for secure, federal, or DoD/IC environments. - Familiarity with mobile device management (MDM), containerization, or secure mobile frameworks. - Knowledge of cloud platforms (AWS, Azure) and DevSecOps practices., Keywords: Senior Mobile Developer, iOS Developer, Android Developer, Swift, SwiftUI, Kotlin, Java, mobile application development, cleared software engineer, Top Secret clearance, TS/SCI, secure mobile development, React Native, Flutter, DevSecOps, Washington DC, direct hire, federal software engineer* ## Description We are seeking an experienced Senior Mobile Developer to design, build, and deploy secure, high-performance mobile applications supporting a mission-critical federal program in Washington, D.C. This is a hands-on engineering role for a developer who has personally owned the full mobile development lifecycle - from architecture and coding through testing, deployment, and sustainment. You will work alongside a collaborative team of engineers to deliver native and cross-platform applications that operate reliably in secure, high-stakes environments. If you take pride in clean code, thoughtful architecture, and shipping products that make a real impact, this role offers the autonomy, technical challenge, and long-term stability of a direct-hire position. What You'll Do - Design, develop, and maintain native and/or cross-platform mobile applications for iOS and Android in a secure environment. - Own features end to end - architecture, implementation, testing, deployment, and ongoing optimization. - Collaborate with product owners, UX designers, and backend engineers to translate requirements into intuitive, performant mobile experiences. - Write clean, well-documented, maintainable code and participate in peer code reviews. - Integrate mobile applications with secure RESTful APIs, backend services, and authentication frameworks. - Optimize application performance, security, and responsiveness across devices and OS versions. - Apply secure coding practices and support accreditation, compliance, and DevSecOps requirements. ## Related Videos - [Intro to Flutter Development](https://www.wearedevelopers.com/videos/170-intro-to-flutter-development) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Optimization of Mobile Development Strategies for Maximum Business Impact](https://www.wearedevelopers.com/videos/1182-optimization-of-mobile-development-strategies-for-maximum-business-impact) - [Why Kotlin is the better Java and how you can start using it](https://www.wearedevelopers.com/videos/661-why-kotlin-is-the-better-java-and-how-you-can-start-using-it) ## Related Articles - [Cross Platform Mobile Development Frameworks to Use in 2025](https://www.wearedevelopers.com/magazine/404-cross-platform-mobile-development-frameworks-to-use-in-2025) - [Flutter Developer Salary [2023]](https://www.wearedevelopers.com/magazine/199-flutter-developer-salary-2023) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)