discord bot required

We require a java expert with experiences to automate discord.

your task will be to implement a bot, which is doing following:
- sending a specific message to a direct message channel to a person/discord bot
- waiting for the reply of the bot on that message
- download the image attachment
- execute specific bot provided commands
- download the resulting files/images of the new command

the same is required also for a public channel, there many other users may post messages to the bot too

We can share you existing code after signing a NDA.

MANDATORY:
you can demo us your implemented bots already for discord, which are able to work in a public channel with multiple users.

Deliveries?
- in our on premise git (access will be granted to you)
- full sources
- maven
- JDK 17
- we are using already https://github.com/discord-jda/JDA

Requirements:
- clean code
- code checked with checkstyle, pmd, spotbugs

Payment?
- you estimate in a WBS after getting the task
- we discuss about clearances and effort
- we mutually agree to effort
- we assign you the task after agree
- you implement & delivery
- we pay
(basically the rules of freelancer)

Closed book vs open book?
We work only on open book.
Closed book means you are unwilling to define a WBS for the work and you add only a price tag to the task. We are sorry we will not hire you in such a case!

budget?
we do not disclose the budget, but we know how much time such a task requires.
Be aware that the person interviewing you in the chat has developer background and thus requires clear technical answers.