I got 284 in upsee 2019 my general rank is 9930 and OBC rank is 2807 can I get CSE in jss Noida?

It is quite tough to get JSS NOIDA. But you can give the preference to this College in each round. You may get chance in spot round counselling. But you can apply for other private Colleges in NOIDA:
1. Inderprastha Engineering College Ghaziabad
2. Krishna Engineering College Ghaziabad
3. IIMT Engineering College Greater Noida
4. ITS Engineering College Greater Noida
5. Amity University Noida
6. Sharda University Greater Noida
You can look for these private Colleges. So go through these Colleges properly. You should do your counselling properly. You should go through counselling till last round. But you can also apply for certain government college:
.1 Chhatrapati Shahu Ji Maharaj University Kanpur
2. Lucknow University
3. Bundelkhand University Jhansi
4. Rajkiya Engineering College Sohnbhadra
5. Rajkiya Engineering College Kannauj
So you can get admission in these Colleges based on your rank. It also depends on the cutoff list. The cutoff list depends on the number of students appeared in the exam and the level of paper.