I expect that to be in the proposal:
About me
Provide your contact information (IRC nick, email, IM, phone) and write a few sentences about you and why you think you are the best for this job. Prior contributions to Joplin are required; list your commits. Name people (other developers, students, professors) who can act as a reference for you. Mention your field of study if necessary. Now is the time to join the relevant irc/telegram channels, mail lists and blog feeds. We want you to be a part of our community, not just contribute your code.
Tell us if you are submitting proposals to other organizations, and whether or not you would choose Joplin if given the choice.
Is that enough?