Yeah you will need to manually amend the 'j' to actually look like a 'J'. Your new mark looks more unique but I'd probably just lose it all together and go for one of your wordmarks.
A bit worried that you may lose 'web-development' at smaller scale, maybe it needs to be slightly bolder? Still not sure about your font choice but I think I prefer number 7 without the overlapping.
If you are going with your mark, I'd go for number 6.
Overall, I just don't quite get the web development vibe though. If you didn't have the words 'Web-Development' would you ever guess you were a web developer?