Simply use Founder and highlight the role you’re applying for. Indeed, it all depends on what type of jobs you’re looking for. Being a one man band in your case

Simply use Founder and highlight the role you’re applying for. Indeed, it all depends on what type of jobs you’re looking for. Being a one man band in your case would be impressive for an individual contributor. For example, an experienced developer. If you’re applying for roles such as manager or product manager, this experience may not cover the major required skills. Building a team, managing people, cross-functional team work, communication or even as simple as team player. I would personally hire someone like you any day. Having a entrepreneurial spirit and a DIY attitude is awesome and rare in more established companies. It’s also a huge plus if you’re applying at startups. So, to answer your question: “Founder - Lead Engineer” or “Founder - Product Manager” for example.