Java

MUST-HAVE SKILLS
Skillset
Core Java (Hardcore Coding): Ownership
Multi-threading / Concurrency: Ownership
Spring & Spring Boot (Customization): Hands-on
REST API / API Development: Hands-on
SQL: Hands-on
Microservices Architecture: Exposure

Definitions
Ownership - should have owned and be responsible for a part of the project where the core skill required is mentioned one. He should be able to describe the project and how he delivered on his specific piece. If required he also mentored a few juniors on the deliverables. He should be able to describe what code he wrote, what were the production level challenges faced etc. Can answer scenario questions on this on an expert level with multiple level probing.

Handson - was working under supervision of someone else but was responsible for something where the core skill required is mentioned on. Should be able to describe the project, his specific role and what were his specific responsibilities. He should be able to describe what code he wrote, what were the production level challenges faced etc. Can answer scenario questions on an average level with 1-2 level probing on specific concepts.

Exposure - was working in a team where someone else was responsible for the skill set in question but the person has seen it in action. He knows the issues that happened with respect to the skill and what did the team do. He is not able to solve scenario level questions but knows typically how to collaborate with other team members on solving the problem.

Knowledge - knows conceptually about how things work and can answer a few questions. Cannot answer anything in scenario based questions.