Quintessence Wealth Software Engineer, Backend interview questions

Screening call then Technical then In-Person meeting with hiring manager and "head of tech". This was interesting. I was made to think i had the job , told i would get an update next business day and barring salary and hiring manager feedback would be good to go, to "not worry" etc. I didnt receive an update until prompted and then received a rejection one week later without acknowledgement. This is clearly one of those tech shops that are pretty tucked away, comfortably aloof from market pressures; no AI tooling, low salary, everyone "senior", low turnover, everyone older; not in the real world (north york)