As per the problem statement, I research different question-and-answer forums, I tried to follow a minimal design that will fulfill the basic criteria for posting a question and get the most optimal answer as per upvotes. Onboarding flow- For the register screen, it tried to keep it simple considering basic details for the user along with its professional which will help to link that with his profile. Then further I asked the user to choose the topic of interest which will help to know the user's choice over different topics and will customize the time line as per the topic selection. Community timeline- I tried to show the top/hot topic which is currently trending under discussions followed by snippets for questions one can also pin the question, "My discussion" Tabs: which is related to the user's Question answered or Question posted.Also, user can segregate information applied filter with respect to individual tabs Post a Question: The user can post a question and add tags, images, audio videos, polls, etc. He can set privacy to public/ or limited users one can also add tags to the question. Users can also save questions as drafts and post them later For user profile: one can see the questions/ and answers for the respective user, and can also ask questions directly by visiting their timeline Features: One can boost their responses by paying some extra amount and get the optimal responses from the best users. I kept the name "My Buddy" for an application that depicts that the app will act as a buddy when the user needs an appropriate solution :) I tried to stick to the problem statement and made it less feature specific. Lots of other things can be added but essential criteria are tried to be fulfilled keeping the design minimal.
As per the problem statement, I research different question-and-answer forums, I tried to follow a minimal design that will fulfill the basic criteria for posting a question and get the most optimal answer as per upvotes. Onboarding flow- For the register screen, it tried to keep it simple considering basic details for the user along with its professional which will help to link that with his profile. Then further I asked the user to choose the topic of interest which will help to know the user's choice over different topics and will customize the time line as per the topic selection. Community timeline- I tried to show the top/hot topic which is currently trending under discussions followed by snippets for questions one can also pin the question, "My discussion" Tabs: which is related to the user's Question answered or Question posted.Also, user can segregate information applied filter with respect to individual tabs Post a Question: The user can post a question and add tags, images, audio videos, polls, etc. He can set privacy to public/ or limited users one can also add tags to the question. Users can also save questions as drafts and post them later For user profile: one can see the questions/ and answers for the respective user, and can also ask questions directly by visiting their timeline Features: One can boost their responses by paying some extra amount and get the optimal responses from the best users. I kept the name "My Buddy" for an application that depicts that the app will act as a buddy when the user needs an appropriate solution :) I tried to stick to the problem statement and made it less feature specific. Lots of other things can be added but essential criteria are tried to be fulfilled keeping the design minimal.

Feedback (3)
I forgot to add something -> It doesn't seem necessary to show those tags there. Those tags could have been a bit smaller. You could use the "#" symbol for better understanding.
Hey, I must say your design is amazing😃. I really liked the colors you chose. Here is my feedback on your submission: You could have tried different icons for comments. All White Spaces should be consistent. Shadows are not visible on the profile page. Give more value to them. It looks like all are one question/post. ->There is a lot of space between the forms and the button on the Sign in & sign up page. -> Recovery password is a link button now so why that is different from other link buttons? -> Add lines between the posts and try some different tags like pinned, trending, etc. -> You have kept the show menu icon horizontal somewhere & vertical somewhere -> If you have given the Read More link button then you have to write the less link button too. ->You should have shown an in-active state for upvote and downvote. How can we see if we don't vote then how will that upvote/downvote button look? Upvote and Downvote Buttons could be a little bigger. ->Remove the stroke from the profile avatar. It Looks odd. ->All Icons should be consistent. To keep things consistent, make sure they all share the same weight and are either filled or outlined. Thanks.
~From Ux perspective your solution justifies users requirement and problem statement. ~Feature for boosting questions responses is value added also feature to - Save as draft is useful. ~I really like the decent color tones used overall good approach and thought process. ~like the flash screen design🙂