I'd echo what some of the other people have said in that "worked on" is doing a lot of work in your CV. I get that you want to be brief, but you could go to 2 p

I'd echo what some of the other people have said in that "worked on" is doing a lot of work in your CV. I get that you want to be brief, but you could go to 2 pages and add in the necessary detail. EG instead of "Worked on" have something like "Was responsible for module that did XX. Optimised the code to serve an additional YYY customers per day on same spec hardware" i.e. more detail on exactly what you did.