Hello, Please visit a physiotherapist who can assess you and know the cause of pain As a soft ware developer you must be spending a lot of time on chair in front of a computer .plus as you mentioned you have been travelling that might have aggrevated your pain. You may take heat pack for 20mins thrice in a day to relieve pain. You can wear a lumbbosacral belt which will support your back and reduce pain. Please its advised for you to strerch and strengthen your back muscles . You may use a good chair with entire back support at your office .a good ergonomics is important . Take care