It's hard to deny titles based on work, however. A tech lead acts as a team leader and has final say on development decisions. A project manager manages a proje

It's hard to deny titles based on work, however. A tech lead acts as a team leader and has final say on development decisions. A project manager manages a project, stakeholders associated with the project and tracks external dependencies of the project. A senior developer writes and checks in code without too much oversight, and other team members come to him/her for advice.