> a senior frontend web engineer is not going to transfer to senior compiler engineer Arguably XHP/React is successful because some senior compiler engineers p

> a senior frontend web engineer is not going to transfer to senior compiler engineer Arguably XHP/React is successful because some senior compiler engineers plied their trade in the front-end world. Or was it senior front-end engineers digging into compiler tech? How about Servo pulling a bunch of game development techniques into the browser development world? There are definitely technical domains you can gain or lack expertise in, but "frontend" vs. "backend" isn't one of them. Those are business contexts, not technical knowledge.