You're young. Someone who took the standard path would have graduated with their masters at the age of 23 or 24. So you're maybe 4 years behind - and I bet that

You're young. Someone who took the standard path would have graduated with their masters at the age of 23 or 24. So you're maybe 4 years behind - and I bet that's still within a standard deviation of the norm. If you stay healthy, you can easily work productively and grow for another 50 years. So don't sweat it at all, you have a lot of time left. Yes, you have zero work experience. So what? Don't sell yourself as a senior engineer - you're not - sell yourself as someone who is smart and wants to work hard, get things done and gain experience. As an anecdote - I have a friend who graduated with their bachelor's degree when they were 30. I have no doubt it was hard for them at first - they were 7-8 years behind everyone else in terms of career, and often more senior members of their team were younger than them. But they dropped their ego, worked hard and put in the time. Seven or so years later, their career has caught up or even surpassed the people who started before them - they lead a large engineering team responsible for a major product within their organization. I think that part of their success is the emotional maturity that comes with age, so while perhaps their technical skills were the same as a 22 year old out of school, they were able to communicate at a more mature level, and their focus meant that they got up to speed on the technical front more quickly. In some ways, I think they were even at an advantage.