Required Java freelancer for Data Structure project for sudoku solver in Java job

Looking someone good with Java and Data Structure. This project requires you to solve four different sodoku problems.

Requirements:

• Should have experience on Java 1.8
  
• Very strong experience on Spring (Core, MVC, Boot, AOP, Security and Integration)
  
• Experience with RESTful web services using JSON.
  
• Strong Understating on JSON and XML.
  
• Experience in writing unit test cases using Junit.
  
• Expertise in Data Structures, Algorithms, Multithreading, Object Oriented Programming.
  
• 4+ Yrs. of core software product development experience in SaaS Product.
  

Skills & Expertise Required

Java