Java Code Challenges
Test your Java skills with our code challenges. Receive personalized feedback and apply for the best job offers as a Java developer!
Challenge by 
Safebox API
Create a digital safe deposit box that lets users add items and keep them safe from peepers.
Challenge by 
Spotlist API
Develop an alternative to the Spotify API that lets indie artists easily manage their playlists.
Challenge by 
Optional, a new hope
Fight against the evil Lord NullPointerException implementing your own version of the Optional (based on the Star Wars universe)
Challenge by
Vending Machine
Create a digital safe deposit box that lets users add items and keep them safe from peepers.
Challenge by
Unsafebox API
Create a digital safe deposit box that lets users add items and keep them safe from peepers.
Challenge by
PrivaTo-Do
Create a To-Do list API where the tasks and all their history of changes are stored on a Blockchain.
Challenge by
Gallery Tracking Optimizer
Create an amazing gallery and optimize it based on user interest.
Challenge by 
Fully-connected developers API
Create an API to see if two Twitter & Github profiles are connected
HOW IT WORKS
WHAT WILL YOU GET
Most popular challenges
Most Used languages
Dev testimonials
Firebase chat
I think it was an amazing experience because I went out of my confort zone and I have completed the challenge on time, I’m happy and now I have another app to show on my portfolio 🙂
Dreadful Tomatoes with React
I think it is a complete Front End Developer challenge, the considerations were clear, I could put in practice my skills, and I understood many things I had no idea. I can't wait for the next one.
Gallery Tracking Optimizer
I would like to congratulate you for the great work you are doing, this is my first challenge, but I will continue to fulfill more, I drew up with the best and thank them for growing this software software developer community
Ready to level up your interview skills?
Gain the confidence you need with our new FREE HANDBOOK on mastering coding interviews.
