How can i boost job post views on LinkedIn (without having Recruiter / Recruiter Lite)?

One way is you could have your fellow mates tagged to your post / an opportunity which would eventually fetch you more results , because you will have more members viewed by followers or connections of your fellow mates where you may not have connected or interacted with. Start a poll and ask your network to tag other people to the post. Try and reply to the every comment on your post.

Hope this helps