At least 2 years of prior hands-on iOS or macOS application development Experience with Swift and/or Objective-C preferred Experience with databases (SQLite), sync frameworks (CloudKit), and system daemons (XPC) Experience with system concepts including multi-threaded processing, synchronization, and interprocess communication Experience maintaining legacy code and backwards compatibility, with a record of replacing legacy code with new things in non-disruptive ways Specific experience defining and driving data structures, APIs, or persistence layers for communication features. You will be responsible for designing and maintaining test applications, automation frameworks which involve deep integration and close collaboration with a cross-functional team of software development & QA engineers, architects, program managers, and other domain experts.