Senior Mobile Developer

Harris Computer; Town of Texas (WI); On-site; USD 125,000 - 135,000; Full time

Job summary

Harris Computer is seeking an experienced mobile software engineer to design and build scalable Android/iOS apps using Kotlin and Swift, with Jetpack Compose and SwiftUI, while leveraging MVVM and modern architectures.

You will lead architectural discussions, review code, and collaborate with cloud and microservices teams. The role emphasizes hands-on coding, performance optimization, and mentoring junior engineers.

Qualifications

• 8+ years of software development experience, including 3+ years as a Software Engineer.
• Deep understanding of software engineering principles, design patterns, algorithms, and system architecture.
• Ability to lead technical discussions and drive consensus among teams.
• Experience with cloud technologies and microservices architecture.

Responsibilities

• Contribute to architectural decisions and ensure alignment with business goals.
• Solve complex technical problems and select suitable technologies and architectures.
• Provide technical leadership and guidance to junior developers.
• Conduct code reviews to ensure quality and standards.

Skills

Kotlin & Swift

Native UI Frameworks

Architecture & Dependency Injection

RESTful API Integration

Testing Frameworks

Mobile Tooling & CI/CD

AI assisted development

AI prompt engineering

Education

Bachelor's degree or Diploma in Computer Science, Engineering, related field, or equivalent work experience

Job description

Technical Skills

• 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.

Responsibilities and Duties

• 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.

Requirements

• 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.

Salary range: $125,000 - $135,000 USD per year.