Senior Mobile Developer

Harris Computer•Washington, DC

40d•$125,000 - $135,000

About The Position

We are seeking a Senior Mobile Developer to join our team. In this role, you will contribute to architectural discussions, make design decisions, and ensure that the overall software architecture aligns with business goals and industry best practices. You will solve complex technical problems, make critical decisions related to technology selection, system architecture, and project planning. Additionally, you will provide technical leadership and guidance to junior members of the development team and conduct code reviews to ensure code quality, maintainability, and adherence to coding standards. At Harris, we believe great people build great software. We offer an environment where employees are empowered to make a real impact, grow their skills, and shape their careers. Our teams enjoy a supportive, award-winning culture, a casual and collaborative workplace, and opportunities to learn from a diverse group of businesses and industries. We are financially strong and proudly part of Constellation Software Inc. (CSI), the largest software company in Canada, providing long-term stability alongside entrepreneurial autonomy. In addition to a competitive compensation and benefits package, we offer meaningful perks, flexibility, and—most importantly—a culture that values people, curiosity, and having fun while doing great work. As part of our recruitment process, we use artificial intelligence (AI) tools during the initial screening phase to help identify candidates whose qualifications most closely align with the requirements of the role. This technology supports efficiency and consistency in the early stages, but it never replaces human judgement. All subsequent evaluations and final hiring decisions are made by our recruitment professionals. AI does not make final hiring decisions.

Requirements

Proficiency in Kotlin & Swift: Deep understanding of modern Kotlin (coroutines/Flow, serialization) and Swift (async/await), including the platform runtimes, memory management and concurrency.
Native UI Frameworks: Experience building production UI with declarative frameworks — Jetpack Compose on Android and SwiftUI on iOS — including state management and lifecycle.
Architecture & Dependency Injection: Experience with reactive, testable mobile architectures (e.g. MVVM, The Composable Architecture) and dependency injection frameworks such as Koin.
RESTful API Integration: Experience designing and consuming robust, scalable REST APIs for third-party integrations and internal UI consumption (e.g. Retrofit/OkHttp on Android, URLSession on iOS).
Testing Frameworks: Proficiency with mobile testing across the pyramid — unit, integration, and UI testing with tools such as JUnit, Mockito, Robolectric, Espresso, and Compose UI test on Android; XCTest and XCUITest on iOS.
Mobile Tooling & CI/CD: Experience with automated, multi-target build and release pipelines (e.g. Gradle, Swift Package Manager, Bitrise, Fastlane), ideally for white-label / multi-tenant apps.
Worked on AI assisted development (e.g. GitHub Copilot, Claude, Cursor or ChatGPT)
Familiarity with AI directed prompt engineering for developing applications.
Bachelor's degree or Diploma in Computer Science, Engineering, related field, or equivalent work experience.
8+ years of experience in software development, and 3+ years as a Software Engineer with a focus on designing and building complex, scalable systems.
Deep understanding of software engineering principles, design patterns, algorithms, and system architecture.
Ability to lead technical discussions, make critical decisions, and drive consensus among team members.
Experience with cloud technologies and microservices architecture.

Responsibilities

Contribute to architectural discussions, make design decisions, and ensure that the overall software architecture aligns with business goals and industry best practices.
Solve complex technical problems and make critical decisions related to technology selection, system architecture, and project planning.
Provide technical leadership and guidance to junior members of the development team.
Conduct code reviews to ensure code quality, maintainability, and adherence to coding standards.