This has basically been my role for the past decade, minus management. In that time I've worked at tiny startups, hypergrowth unicorns, and the biggest tech co

This has basically been my role for the past decade, minus management. In that time I've worked at tiny startups, hypergrowth unicorns, and the biggest tech comapnies. In no case have I ever been hired as a jack-of-all-trades fixer. In every case I was hired because of my specialty (mobile development), and ended up just "making myself useful". In my experience, job titles, levels, and even team membership are more "guidelines" than rules, and are often trailing indicators of what and how you're actually doing. I wouldn't worry about finding the perfect opening - just find a team you like and a manager who seems to get it.