Public:Engineering Maturity

In your Software Engineering career you grow in maturity. Eg from an Engineer, to a Senior Engineer, to a CTO. Inspired from Amazing CTO book this evolves your Job Titles as follows

1. Engineer
2. Senior Engineer —chasm1--
3. Tech Lead
4. Team Lead / Engineering Manager —chasm2—
5. Head of Engineering
6. VP of Engineering
7. CTO

Most engineers stay before Chasm1 (which is perfectly alright). Because what works before Chasm1, doesn't works afterwards. Same with Chasm2.