List of things Backend developer of certain levels should be able to do/understand/use

Please add all concepts that a backend developer should/could know, or is something has to do.

##more

Consumer

• Throttling
  • Time limit
  • Day limit
  • Per Criteria Limit
  • Aggregating
• Authentication
  • Email/Password
  • Basic
  • Token
  • OAuth2
• Data Formats
  • XML
  • JSON
  • Binary
  • JSONP

Provider

• Provide Simple REST API
• Authorization and Authentication
  • Email/Password
  • Basic
  • Token
  • OAuth2
• Throttling
  • Per user
  • by time
  • by day
  • queuing
  • slowing down

• Websocket
• Server Sent Events
• Long Polling
• Webhooks

• Salt
• Encryption
  • bcrypt
  • hashing
• Session
  • cookie encryption
• Remember Me Feature

• Indexing
• Aggregating
• Cursor
• Modeling
• UML
• Validations
• Performance Debugging
• Cleaning
• Relationship

• imagemagick
• ffmpeg
• resizing, scaling, rotating, transforming, clipping, grayscale
• opencv
  • face detection
  • motion detection
  • nonlinear transforming

• Phone Call
• SMS
• Email
• Weather

• Event Based
• Time Based
• Program accepting params

• Micro Services

• read file
• write to file
• mass renaming