Few project ideas as below

• OptaPlanner OptaPlanner
• Snowflake Medium Snowflake Create a snowflake based on skills acquired by a person
• https://www.javaguides.net/2018/09/mini-todo-management-project-using-spring-boot-springmvc-springsecurity-jsp-hibernate-mysql.html
• Create your own Json Formatter to avoid data misuse by third party sites
• Create a UI client for https://www.gopass.pw/ like https://github.com/codecentric/gopass-ui (Back end written in Go Lang)
• Github merge request notifier - build upon it
• Implement Chaos monkey for Spring Boot
• Implement Hikaku - tests if api developed meets its specifications
• Implement BDD with JUnit5 Structured Junit 5
• Create functional app in Java 8 using Cyclops Cyclops - functional app in java 8
• Moloch to capture realtime data and feed to kafka stream / spark
• App using predictions / Ml Prediction IO
• Video player using google’s Shaka Player and source code also embedded
• Google’s timesketch for forensic timeline analysis - can be used to analyze logs/time based data like stock market events etc.
• Module / Project to leverage code for sending emails using SMTP/Amazon SES
• Create a application using cadence workflow https://cadenceworkflow.io/ - retry with guaranteed execution, downloading with retries, etc. Library is developed by uber and contains cassandra, queue and timer to guarantee execution of code.
• Use CUBA platform for Rapid Application Development - https://github.com/bhavyakamboj/cuba-example-using-scheduled-reports Scheduled Reports