Senior developer is a very junior position. Any feelings of being too young are likely due to title creep, not actual inexperience. It's like "vice president".

Senior developer is a very junior position. Any feelings of being too young are likely due to title creep, not actual inexperience. It's like "vice president". In some companies, you are literally next in line to head of the company. In others, you're 27 and there are thousands of you.