Where I was at senior was the base title. Then there were numbers after the title and team lead after. At the time I would not have marketed myself as a senior

Where I was at senior was the base title. Then there were numbers after the title and team lead after. At the time I would not have marketed myself as a senior but that's what they paid me as/my title and I kept the job for almost two and a half years so I guess I'm senior? I avoid using the word engineer though as I don't have a degree.