Senior Mobile Developer

Harris Computer; Town of Montana (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 apps using Kotlin (Android) and Swift (iOS). You will work with declarative UI frameworks (Jetpack Compose and SwiftUI) and lead architectural decisions across MVVM and dependency injection, while integrating robust REST APIs.

The role emphasizes code quality, CI/CD and AI-assisted development tools. You will mentor peers, participate in architecture discussions, and help shape multi-tenant

Qualifications

• Bachelor's degree in Computer Science, Engineering or related field, or equivalent experience.
• 8+ years of software development experience, 3+ years as a Software Engineer focusing on 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.
• Experience with cloud technologies and microservices architecture.

Responsibilities

• Contribute to architectural discussions, make design decisions, and align architecture with business goals.
• Solve complex technical problems and make critical technology decisions.
• Provide technical leadership and guidance to junior developers.
• Conduct code reviews to ensure quality and standards compliance.

Skills

Kotlin

Swift

Jetpack Compose

SwiftUI

MVVM

Dependency Injection

REST APIs

JUnit

Mockito

Robolectric

Espresso

Compose UI testing

GitHub Copilot

Claude

ChatGPT

Prompt engineering

Education

Bachelor's degree in Computer Science or related field

Tools

Jetpack Compose

SwiftUI

Retrofit

OkHttp

URLSession

Koin

Gradle

Swift Package Manager

Bitrise

Fastlane

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.