I worked at Palantir for a number of years, and was heavily involved the hiring of Forward Deployed Engineers. The vast majority of FDEs did serious software development. There are only a few people I can think of who were not engineers, and their presence on deployments had to do with the alignment between their analytical background and the customer's focus.
The FDE's shouldn't have been doing any core software development unless it was some kind of bespoke one-off code, some kind of helper app for a specific SAP program or something, and that software, code and all, now belongs to the government.
They should have been doing implementation and FSR duties. If they were doing core product development while on Federal Contract, the government owns that software now. If it hasn't been turned over, source and all, it could be grounds for an IG investigation.
That is very serious stuff, so I hope you can qualify what you mean by "serious software development".
As for FDE's doing sales, just look at the current job openings. The BD team is full of FDE openings. What exactly do you think those FDEs do on the sales team?
Since everybody who touches the customer has the same title (except for Mission Specialists), it's easy for Palantir to start a deployment with non-sales FDE's, then swap them out for sales FDE's and start working the organization.
It's sketchy, but it's super smart if they're careful about it.
