The hiring process at National Energy Services takes an average of 14 days when considering 1 user submitted interviews across all job titles. Candidates applying for Software Developer had the quickest hiring process (on average 14 days), whereas Software Developer roles had the slowest hiring process (on average 14 days).
The interview process is good and not complicated. So it requires you to study and prepare yourself for the exam. Exam is quick and you will not have enough time
I applied through a staffing agency. The process took 2 weeks. I interviewed at National Energy Services (Milton Keynes, England) in Nov 2015
Interview
Stage 1 is a telephone interview. Stage 2 is a face to face interview at company offices in a meeting room and consisted of questions, querying code and writing unit test session. Staff seemed polite. Don't expect them to get back to you if they are not interested, even to provide feedback which shows lack of respect considering you take the time to take their interviews.