Derren Flet/Legends

Derren Flet was the chief architect of Jabba Desilijic Tiure. The Hutt had him rebuild his father Zorba's palace on Tatooine, so it would be up to his own standards. Flet failed to provide adequate space for Jabba's prisoners and therefore met his untimely death.

Behind the scenes
Jabba's architect from Star Wars Republic: Outlander may be the same character as Derren Flet. A connection between them has not yet been established in canon.