Senior Mobile Application Developer (iOS or Android)

Brookfield, Wisconsin

Date Posted: 3/22/2021

Job Snapshot

Employee Type: Full-time
Job Type: IT
Date Posted: 3/22/2021

Job Description

Senior Mobile Application Developer (iOS or Android)

Who we are: We are the One-Key team, a collaborative tool and equipment platform that helps jobs run smoother, with fewer headaches along the way. On the connected tools team we help users Track and Lock tools, Dial in Performance, pull Utilization data, and give users the Ultimate Control over their tools. Learn more about connected tools.

Our Values: On the One-Key team we strive to deliver customer value, be transparent with work in all directions, embrace empowered, autonomous teams, receive, give, and ask for feedback frequently, and think with an entrepreneurial mindset.

The Job: We currently have 4 product teams and are looking to grow. You will be on our connected tools team, helping create and improve the app experience for our One-Key tools. Using your knowledge of Core Bluetooth, you'll work directly with our Electrical Engineers to define and implement communication protocols between the app and power tools. Working collaboratively with UX, QA, and Product Management, you will prototype, test, and build the app interface to make our users more productive on the job site.

Who you are: A self-motivated developer with experience designing and developing native iOS apps OR native Android apps. You have a strong knowledge of Kotlin OR Swift, and stay up-to-date with the latest native platforms and technologies.


  • Bachelor's Degree in Computer Science, Business Administration, Management Information Systems (or related field), or 5+ years of related experience, with Java preferred
  • 3+ required years of native mobile application development experience in a professional environment
  • Requires strong written, verbal, analytical and interpersonal skills
  • Minimum of one published app in iOS App Store or Google Play Store
  • Experience working with agile methodology such as Scrum or Kanban
  • Experience with object-oriented and protocol-oriented design methodologies
  • Experience working with agile methodology such as Scrum or Kanban
  • Experience with git source control and team code reviews
  • Experience working in a Product Team structure a plus
  • Experience with following Android technologies:
    • Object Oriented design
    • MVVM
    • Android activity lifecycle
    • Kotlin
    • Java (to support our legacy code)
    • SQLite, Room, Android Architecture Library, Paging Library
    • Consuming REST APIs and HTTP services
    • Retrofit, OKHttp
    • Material Design Framework a plus
    • Coroutines, Reactive Programming a plus
  • Experience with the following iOS technologies:
    • Core Data
    • Consuming REST APIs and HTTP services
    • Swift, SwiftUI, and Combine
    • CocoaPods
    • Core Bluetooth and similar hardware APIs a plus
    • Fastlane and Jenkins a plus
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