9 years experience, minimal system design experience

I have 9 years experience, mostly developing niche desktop applications in dinosaur companies using antiquated frameworks, and minimal system design experience. I’ve also developed a few simple CRUD w

I have 9 years experience, mostly developing niche desktop applications in dinosaur companies using antiquated frameworks, and minimal system design experience. I’ve also developed a few simple CRUD web applications from end to end, but never had to scale. I feel very badly positioned in this market. How should I be approaching interviews and position myself better in this market overall? Any advice is appreciated! Please help me. Thank you