Dear whom it may concern:
I can help you with finishing the project's back-end part.
I'm particularly enthusiastic about back-end development as I worked on back-end software for several years, and your project would be an interesting project to further my experience.
For me, I consider front-end work to be tedious work, so it's perfect if I don't have to delve too much into it.
For you, from designing the back-end part from A to Z, I can assure the full software engineering process, which includes designing the project, implementation, functional testings, and the acceptance test. If any bug happens because of my mistake, I hereby guarantee you that I work until the product work as requested.
Since the bidding is competitive, I want you to look at my resume in my profile and consider me for this project.
Even I propose that the delivery date would be 20 days, yet it's a hard deadline considering I have other jobs to do; I'm expecting to finish it in 7 or 10 days.
If you are interested or have any question, don't hesitate to contact me back.
Sincerely,
Wooyoung Son
UW Student