I was working on a project where the two other person before me failed to get the job done as expected. Basically that was the reason they hired me, and fortunately I did it better than expected.
How can I express it in a proper English in the cover letter when I'm applying for a new job?
Just in the case that it might help, the first person lost the job (employer didn't renew the contract) however he's still promoting himself using the project name and saying he were working on the project. The second person got fired, however he is also doing the same like the other one.
I think, I have to mention it somehow that it was my effort to make the project successful, because that could potentially land me the job, but I really don't know how should I express that that doesn't sound negative, etc.
P.S. I know that I have to discuss it while they are interviewing me, however I prefer to increase the chance by putting that in the cover letter first.