Rigetti is great place to grow in a number of dimensions as a software engineer. You will be surrounded by talented mathematics and scientists. Their discipline is infectious and you will likewise be treated with respect if you bring a strong software skill set to bear on the company mission. This is not a place to come work if you want to be the star of the show or catch a rocket to the moon (quantum computing is a long term technology). But if you like to grow technically in a number of dimensions, this is a good place.
Cons
The company is not new and the industry is still in an R&D phase. Technical challenges lie ahead before financial sustainability.
Nothing comes to mind - place was awful - left the minute the opportunity presented itself
Cons
Everything here was awful - tons of cons - too many to list completely
Management was highly political, unfocused, unprepared
Monitoring was non-existent
Teams competed against each other instead of working together
Non-trivial was the catch phrase for not doing the right thing ("collaboration" here was a joke)