I have worked at Juniper for 2 years.
Right now (beginning of 2019) it is the hiring season, hope this post could help.

In my past experience, Juniper is a very chill company compare with Facebook, Huawei, etc.
Since Juniper does team hiring, there will not be a long (6 weeks+) Bootcamp for the candidates to pick teams.
You already know who is your direct report when you have your offer.
You will be assigned with some common tasks, just give you the idea about how the code base looks like.

• If I can start over

1. During my first one-on-one with the mgr, I would set the right expectation to him. I will give him an idea of what my skill set looks like. Such as I did some front-end projects by using ReactJs and Redux. I could be a quick learner if I will be assigned with VueJs related tasks. I am familiar with Restful design and Graph approach. I am not familiar with XXXxxx. Let your mgr know you in person, not from your shinning resume
2. Be humble to your teammates, set the right attitude.
3. Practice my presentation skill. If you are really bad at it, try to do it in the following approach:
   What is the problem we are trying to solve ---> Before my solution ---> After my solution ---> What I have achieved ---> Design draft, happy to take questions. ---> Thank you!
4. Before go to the one-on-ones, be fully prepared. Don't ask stupid questions!
5. Read some OOD after you have the offer, if not, only LeetCode : ) , for effective communication purpose.

• During an One-on-One

1. A quick introduction on what you have done, be summarized!
2. Have I met your expectations?
3. What is your expectations for me in next sprint?

• Conversion Rate at Juniper
  As far as I have observed, veeeeerrrrrrry high : )