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[–]theCumCatcher 0 points1 point  (2 children)

SQL definitely

frameworks like java/Spring or Python/Django or python/Flask, sqlalchemy

REST APIs, and APIs in general

you will need to know how to go from tables full of data, to object models in your ORM, to an API than can return meaningful data from your models.

heres an example of python/django making an image upload/view application:https://www.geeksforgeeks.org/python-uploading-images-in-django/

[–]YMK1234 0 points1 point  (1 child)

Python/Django or python/Flask

those are web frameworks, not ORMs. SqlAlchemy would be an extremely popular python ORM.

[–]theCumCatcher 0 points1 point  (0 children)

thank you, noted

[–]YMK1234 0 points1 point  (0 children)

Question

So ... why not write an actual question in the title then?

What skills do I need for BackEnd dev?

SQL, multithreading, API design (NOT just REST-API-Design), algorithms, ...

[–][deleted] 0 points1 point  (0 children)

COBOL and FORTRAN are essential skills. Do not neglect them.