What's reasonable salary for software engineer in Sydney/Australia

There is so much secrecy around salaries at work especially in a new country where you don't have many connections. I found that information online regarding software engineer salaries is unreliable as it significantly differs from job offers at the time of checking.

Based on your experience, What do you think the annual salary of a software engineer should be within the below context.

Years of experience: 5 Industry: Finance (Fin tech) Role: Software engineering - backend systems Programming lang: Any