You can post bounty nostr events through the RESOLVR (npub1fmu…je8w) web or desktop client, and easily keep track/direct developers to apply for your bounties.
E.g. https://bounties.resolvr.io/u/npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm