Senior Mobile Developer

Mass Digital Health; Massachusetts; On-site; USD 125,000 - 135,000; Full time

Job summary

Mass Digital Health is seeking a senior mobile engineer to design and build native Android and iOS apps using Kotlin and Swift, leveraging Jetpack Compose and SwiftUI with MVVM architecture.

You will drive technical decisions, lead code reviews, and mentor juniors while integrating REST APIs, CI/CD pipelines (Gradle, Bitrise, Fastlane) and AI-assisted tooling.

Qualifications

• Bachelor's degree or Diploma in Computer Science, Engineering, related field, or equivalent work experience.
• 8+ years of software development experience, with 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 ensure alignment with business goals and best practices.
• Solve complex technical problems and make critical decisions related to technology selection and system design.
• Provide technical leadership and guidance to junior team members.
• Conduct code reviews to ensure quality, maintainability, and coding standards.

Skills

Kotlin/Swift proficiency

Jetpack Compose / SwiftUI

MVVM / Architectures

RESTful API integration

Testing frameworks

CI/CD pipelines

AI-assisted development

Prompt engineering for AI

Education

Bachelor's degree or Diploma in CS/Engineering

Tools

Retrofit/OkHttp

URLSession

Koin

Gradle

Swift Package Manager

Bitrise

Fastlane

GitHub Copilot

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 & 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.