Depends on your financial conditions! also taunts of society as well. If your family is okay for you to not to earn and still prepare so don't worry about the job. Prepare of civil services. If there is need of money and your immediate family members once in a while says that you should earn. Get the job. It's a subtle taunt from them that they can't feed you anymore unless you earn! That's Harsh Reality.
Are you talking about the prelims paper on June 5 or are you thinking about next year? If it's the coming one, it will be a bit difficult to focus. But if it's the coming years, you can consider the job on the condition you have a dinosaur grip on static part.
.you can go for the job and you can chase your dream, if you are really passionate about then anyhow you will take out the time to study while having a job. or for the time being a job is not your utmost priority rather cracking the exam then go for it. PRIORTISE and what feels better being independent or studying. Also consider after cracking the how sure you are that will get immediate employment.