Senior Mobile Developer

Harris Computer; Pennsylvania; On-site; USD 125,000 - 135,000; Full time

Job summary

Harris Computer seeks a senior mobile software engineer to design and develop native Android and iOS applications using Kotlin and Swift. You will contribute to architecture, mentor teammates, and drive high-quality code through reviews and automated testing.

The role emphasizes modern UI frameworks (Jetpack Compose, SwiftUI), MVVM patterns, and CI/CD pipelines. Experience with cloud microservices and multi-tenant apps is a plus.

Qualifications

• 8+ years of software development experience
• 3+ years as a Software Engineer focusing 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 alignment with goals
• Solve complex technical problems and guide technology selection and planning
• Provide technical leadership and guidance to junior developers
• Conduct code reviews to ensure quality and adherence to standards

Skills

Kotlin

Swift

Jetpack Compose

SwiftUI

MVVM

Dependency Injection

Koin

REST APIs

Retrofit

OkHttp

URLSession

Unit testing

JUnit

Mockito

Robolectric

Espresso

XCTest

XCUITest

CI/CD

Gradle

Swift Package Manager

Bitrise

Fastlane

AI assisted development

GitHub Copilot

ChatGPT

Prompt engineering

Education

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

Tools

Retrofit

OkHttp

URLSession

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.