I've been working in my current job for 7 months now, as a call center employee. My title has been "Team Lead". I've spent the majority of that time designing, deploying, and maintaining reports, dashboards, and productivity tools for our 100+ person team. I spend 8 hours a day programming.
My employer has decided to have me try and adapt my tools to work with other teams within the company and wants to promote me to a position to do so. They have not divulged the pay yet, but my PM has let me know that they are going to try and low-ball me into something less than $30k/y.
I have some leverage. One of my tools is heavily used by the companies workforce team to the point where they rely on it. And my dashboards and reporting is a required part of day to day activities for the operations team for our largest client.
This is a VERY cheap company, they pay their supervisors $28k/y and their program managers $50k/y. They put anyone that earns over $11.50/h into exempt positions if they can get away with it, so there is no getting around that part.
I want to put my foot down at $35k. What are some effective methods to push back on the salary when I know I have some leverage?
Note: I understand that an exempt position for such a low wage is me being taken advantage of. I enjoy my work, and I need to get good experience on my resume.
Edit: Current salary is $23k, but I am hourly.
Edit: Company made offer, then rescinded it, no negotiations were made.