So you've led an engineering team and been involved in every part of the development process. You built a product/service from scratch and grew an engineering team from the ground up. You defined development processes to help the team deliver high quality software. You focus your energy on whatever the highest priority is for the company and likely spend a lot of time helping your team members move past obstacles. You probably don't do as much coding anymore, because that is the least useful way to spend your time and expertise when you're juggling these other responsibilities. This lack of coding might feel a little weird if you still consider yourself a developer, but your work has a force multiplying effect across the entire team. You described this as sitting in between an engineer and a manager.

If I got that right, you have just described a "tech lead" role, and your experience is far more valuable than a standard developer role. You can find those roles at companies big and small, depending on your preference. They're easier to find through your network than through job postings. They carry a lot of responsibility, but they can also be highly rewarding.

You're the only one who can decide what you WANT to do with that experience though. Do you want to find another tech lead role? Update your resume to emphasize your leadership experience and technical background. Development role? Emphasize those aspects of your job and start grinding on leetcode. Manager role? Emphasize your leadership experience and how you helped grow the team. You're well positioned to move into any of these roles, depending on what you want from your next job.