dimacheverda / ios-skills-matrix

iOS Developer Skills Matrix

☝️ What is it?

A compilation of indicators about knowledge in a particular area of iOS development.

✌️ How to use it?

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 👍

👌 Why these levels/skills?

This article explains a bit 😉

Google Docs Version

Google Docs Version Link

Markdown Version

	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