Greetongs,
I am an expert javascript professional and I can build any sort of app in pure JS for you.
Your project description doesn't describe much about the requirements. So I would like to know what kind of task management are you looking for?
Shall we discuss this over chat? I can start now if we work this out.
Regards
Dear Sir/Madam,
I can develop task management app using Javascript. I have used Javascript extensively for many of web-application development. Hence, I can develop the page, you are looking for as per your requirement on time.