I applied online and then recruiter and scheduled a telephonic interview. JD was of build-release engineer - one requirement was knowledge of CI tools like Jenkins. But the interviewer was interested in only Jenkins knowledge. I had already cleared about Jenkins with the recruiter - that i have experience in other CI tools like CruiseControl but in Jenkins. He asked questions in shell scripting and perforce - i could answer almost all of his questions. On Jenkins skill, i re-iterated that i have no experience in Jenkins but i have worked on other CI tools. I think they should clearly mention in the JD that they are looking for only those candidates with "Jenkins" experience rather than writing "knowledge in CI tools".