KISS (Keep It Simple Stupid)
YAGNI (You Ain't Gonna Need It)
DRY (Don't Repeat Yourself)
SOLID (Single Responsibility, Open-Closed, Liskov's Substitution, Interface Segregation, Dependency Inversion principles)
Occam's razor
Law of Demeter
Loose coupling
Clean Code [1]
Clean Architecture [1]
TDD (Test-Driven Development)
DDD (Domain-Driven Design)
Agile
CI (Continuous Integration)
CD (Continuous Delivery)