How should we scale from two or three developers to a team of ten?

Answer:

As you grow, you need to shift from everyone doing everything to clearer ownership areas. Define a few product or system domains and assign leads who are responsible for their health and roadmap. Introduce lightweight processes such as regular planning, code review norms, and design discussions to keep alignment. Watch for bottlenecks where one person becomes the only expert on a critical piece of the system and invest in knowledge sharing. Hiring for complementary skills, such as DevOps, QA, or data, can unlock productivity for the whole team.