I didn't say anything about partial engineering. Just that engineering disciplines are different. If you need to design a column to hold up some load, a set of equations will tell you the dimensions of that column, how much cement, sand, etc to put in the concrete mix, how many steel rebars of what diameter and specification. Designing that column is very different than anything I do as a software engineer.
But, if you need to design a data processing system with a certain throughput, a set of equations can tell you how many servers you will need, how much storage, constraints on latency or network bandwidth, etc. So it's not so different after all.
