From my POV, what you do in the FPGA is mostly irrelevent, as most people can handle designing some sort of pipeline. My main interest would be:
1. Have you any experience setting up and using DDR interfaces?
2. Have you any experience setting up and using High Speed Serieal Interfaces (PCIe, Ethernet, SRIO etc).
3. Proof of architecting and designing a system, with teamworking an essential part of this.
4. Do you have good experience with a simulator? are you capable of building a self checking test bench that meets a test goal? (Plusses for this will be things like VHDL 2008, OSVVM, Vunit, CocoTB (from a VHDL POV) or SystemVerilog, UVM. But dont mention them if you dont understand them).
I dont think DSP is as important or useful anymore. Tools are pretty efficient, CPUs are faster and resources are often more plentiful than the used to be. FPGAs are more often now about moving packets through a system at 10Gb/s+ bitrates - so for this you need 1/2 above.