Starfinder + Space Station 13?
I definitely plan on having the PCs start off at least a few levels above 1st. The setting I have in mind involves the PCs being an ERT (Emergency Response Team) which is sent to the space station to fix whatever's gone wrong. Usually, during a round of SS13, calling in an ERT means that some department on the station isn't functioning properly and the ERT's job is to go in, take charge of that department, and get things done.
The plan for my campaign is that the station has gone radio silent and the ERT is being sent in to figure out why and recover the station if possible. They'll need a mix of skills to navigate the station and remain safe, so one of the ERT members might be equipped with a heavier laser gun as well as a few pairs of cuffs, a taser, a stun baton, a flashbang, etc. A second member of the ERT might be outfitted with tools that will let them cut or hack their way through airlocks, disassemble walls or floor tiling, weld vents shut (because ALIENS!). A third member of the ERT might carry several different types of medkits as well as a medical beamgun and variety of drugs to keep their teammates on their feet in an emergency.
Space Station 13 has a ton of jobs for players to play and so part of my task of making it work in the Starfinder ruleset is to figure out what class features each job might have, and what class features are most desirable for an ERT so that they have the best chance of success.