[rheeseyb]

One possible path is to push for a senior developer role and then afterwards a tech lead (or similar) role (perhaps not at the same firm). That will then open up CTO or dev manager roles in startups. It won't "just happen" - it will require a whole load of work on your behalf (you'll need to learn your way around a broad selection of technologies rather than focussing on mastering one language and one platform, as well as learn a number of managerial skills including effective communication, negotiation etc.). Good luck! Disclaimer: I'm not a CTO but have been offered a number of CTO and dev manager roles at startups and small companies.