If you are a fresher – you need to learn the basics along with some projects to proof you should be hired as usually for data scientist roles experienced people are preferred
If you are 5 year exp – you are slowly advancing to lead level roles, so you need to prepare and give competition to 7-8 year experience folks. That strong your preparation must be in depth technically.
If you are 10 plus year of experience – you need to master not just in data science but also be familiar with fields around data since such as Software Engineering, QA, DevOps, Cloud Computing because ultimately you will be leading the team of data scientists or join as technical architect and you will have to interact with folks from these teams for end to end deliverable of data science product
We will help you with all the above categories, prepare you as per your background, make you competitive and create a compelling case for you which will help you to excel in the interviews and get hired as compared to others!