HI,
I can assist you with "build a web app", I have experience working with "similar Development".
Let's have a quick chat to discuss it further.
Relevant Skills and Experience
I have been in this "web app Development" field for a long time now, you can further check my sample work at:
https://www.freelancer.com/u/extreamcode.html
Proposed Milestones
$155 AUD - project milestone
Stay tuned, I'm still working on this proposal.