Do you post a lot, OP? I find that the algorithm favours people who don't post often. This is usually because if you see someone come up on your feed who rarely posts, you might think "ooh what's this?" and have a look. Given said person posts I frequently, it's likely what they do post is quite newsworthy and more likely to get interactions. Then when they next post again, the algorithm pushed their post because of the interaction it got last time.
On the other hand, if someone posts stuff all the time it can make the algorithm work against you. If you regularly post day-to-day mundane stuff, most people are probably likely to scroll past without interacting. Then the algorithm stops pushing your posts because it thinks they are not engaging to users. Then when you actually post something interesting, no one sees it because the algorithm has assumed it will not engage users.
The fact that you're posting about a new job makes me think maybe you post quite a lot? I don't think most people would post about something like that, the bar of "newsworthy" is usually a fair bit higher (of course it's great you got a new job, well done you!).
The answer is to stop caring about likes. It's honestly so irrelevant and meaningless. I don't ever post life events or news online because I just view that stuff as private and share the news individually with people I care about. I only ever post nice photos from walks etc, and despite having quite a few friends on fb (all people I genuinely know, in fairness), I only get a handful of people who interact. But that's okay, because I'm just posting photos because I think they're nice and I like sharing them with the small amount of people who care about them 
it's not a reflection on how much people like or care about me, it's just a reflection of what they use social media for.