I’m a software engineer with 10+ years of working experience. Currently working at FANG.
When I see the word architect I think about architecture. Not software architecture.
Immutable is another common software domain word. An article posted to yCombinator's "Hacker News" titled "Immutable Architecture" could refer to edifaces that don't change (?) but I was not surprised to discover that it refers to software architecture.
It'd be fine if 'immutable' wasn't also very commonly used in the directly adjacent domains of systems and security architecture.