Hello, my name is Derek and I am a full-time freelance software developer with experience building and deploying various APIs to Heroku. Your project is for the deployment and configuration of a specific PDF form filling library to Heroku. You need to be able to send a PDF and form data and receive the filled PDF. Luckily, pdf-filler already has this functionality and it will be straightforward to setup the service as described.
It sounds like may also need some frontend work so that the PDF filler is exposed via your website. I'm proficient with common frontend technologies starting from plain Javascript, so chances are I would be able to assist you with this as well.
Feel free to contact me at your earliest convenience to discuss your project further, I can be reached any time between 8 a.m.—8 p.m. in Central Standard Time (Central United States). I am also very flexible if you wish to contact me outside of this timeframe.
Thank you very much for your time and consideration, I look forward to speaking with you and appreciate the opportunity to support your project and possible future projects!
Thank you,
Derek Sanchez
Mobile, Web App and Backend Developer