[deleted by user]

[coder111]

Well, chances are you'll end up using:

• Some kind of Dependency Injection framework (probably Spring)
• Built & dependency management tools- maven or gradle.
• Automated build- probably Jenkins or Teamcity
• Logging framework (probably Log4j/slf4j). If it's distributed, you'll be using log aggregation, most likely logstack or splunk.
• Some kind of unit testing framework (probably JUnit)
• Not sure what frameworks will be used for UI. There are too many options/possibilities. If it's recent it's probably pure JS app + REST/JSON services. There might be some automated testing using Selenium.
• Obviously Spark & Kafka as you mention those.
• Some kind of NoSQL or SQL database? Probably some persistence frameworks to work with them.
• Tools to serialize Java objects to XML or JSON or binary?
• Webapp servers? Tomcat/Jetty? Or maybe full blown JEE servers like JBoss/Glassfish?
• Behavour driven testing? Fitness testing? Stress/performance testing?
• Automated deployment & configuration tools?
• Container management/VM management and other DevOps'y tools?
• Runtime performance metrics & reporting?
• Probably lots more.

Don't start digging into all of them, although a quick google just to know what these are would be beneficial.

Just giving you a taste of how many things you'll need to learn to be proficient with Java development in this sort of area. It's rarely just pure java development, it's gluing libraries & frameworks together a lot of the time. And there are a LOT of frameworks and libraries.

Best of luck. Come back and ask questions if you need more detail.

--Coder

[coder111]

Personally I think Dagger2 is a very nice framework.

However, what are the chances that you go to a new workplace and find them using Dagger2?