A compilation of indicators about knowledge in a particular area of iOS development.
Move from the left to right, try to give a confident, affirmative answer. Ability to hold a meaningful conversation about a particular topic is typically a good rule of thumb 👍
This article explains a bit 😉
| Junior | Middle | Senior | |
|---|---|---|---|
| Ability | can make a news app talking to a JSON API | can timely design and deliver fast and reliable chat module | can establish team behaviour standards with non-fanatical ideas |
| Code Integration | uses git to move code around | has an opinion about GitFlow | has ideas how to build a CI process and automate chores |
| Paradigms | got the idea of OOP | got hands dirty with FRP | brings value from other platforms and paradigms |
| Dependencies | knows how to use Cocoapods | knows why apps can't use SPM, but Carthage is an option | knows why it is essential to own/reduce dependencies |
| Platform | uses Array, Dictionary and Set | knows Value/Reference types and Equatable/Hashable | knows the details of method dispatch of both Swift and Obj-C |
| Client-Server Protocol | getting that JSON from the Internet is a piece of cake! | making a WebSocket-based real-time chat is feasible | building a video chat is an achievable challenge |
| Reference | uses StackOverflow as a single source of truth | often uses official documentation | asks platform developers and can reverse engineer |
| Memory | knows how to avoid and fix a memory leak | knows NSPointerArray and why structs increase binary size | has a strategy to reduce out-of-memory crashes |
| UI | can build basic UI in the Interface Builder | has reasons to make UI in code | can take layout and diff calculation to non-main thread |
| Multithreading | asyncAfter is a friend, @synchronize all the things | asyncAfter is an enemy, and thread synchronisation is a problem | understands multithreading problems beyond the deadlock |
| Attitude | expects others to teach and guide during development | discusses design with the team to share decision | takes responsibility for design decision made by teammates |
| Design Patterns | understands Delegation, Target-Action and MVC idea | is proficient at Observer, Facade and Mediator patterns | knows the sweet spot between dependency injection and service locator |
| Product Quality | the app is tested if it works on my phone | writes unit tests and tried TDD and UI tests | defines a maintainable test pyramid with non-overlapping coverage areas |