If you can, find people who used to work there and ask them honestly how it wasThe good thingsThe salary is fair but not very competitive
The challengesSome senior staff expect a lot of respect but don't always give it back. Even though most leaders are millennials or gen Xs, some behave in quite old-fashioned ways. There is more behind the scenes conflict than you might expect. This can make teamwork harder and affect how you feel day to day. Super draining, imo.
"Flexible hours" not what it sounds like or WFH, it's the same thing. The flexibility is not really about freedom. It often means your schedule can change suddenly or you get unexpected tasks even in the weekends. Work life balance it's a myth here.
Some managers/heads/directors are good, some are definitely not. Before accepting an offer, try to learn as much as you can about the people, this matters a lot for your growth and wellbeing.