JPEG Conversion to Print-Ready PDF

I have a finished design saved only as a JPEG and I need it converted into a high-resolution, press-ready PDF. The final piece will not be a standard A4 or Letter sheet—I’ll supply the exact millimetre dimensions as soon as we begin—so please be comfortable setting up custom trim, bleed, and safe zones accordingly. Colour mode must remain CMYK, fonts and images fully embedded or outlined, and the file should open cleanly on any RIP or pre-press workflow. If you typically work in Adobe Illustrator, InDesign, or Photoshop that’s perfect; just make sure the exported PDF meets general print specifications (300 dpi, no compression artifacts, crop marks optional on a separate layer). Once complete, send me the ready-to-upload PDF along with the working file in case I need to make text tweaks later. Fast turnaround appreciated—this is a straightforward job for someone used to prepping artwork for offset or digital presses.