Consider a guy named “SAM” is working in a software company “xyz”. The company is paying him a salary initially of 15K. He works in that company for 2 years and then moves into a different company, after lots of negotiating, he earns 30K per month.The same happens and he earns 50-60K in next 3 years. So finally when he has 5-6 years of experience he becomes a Team Lead which he will be earning around 70K. Then after 5 more years he becomes a project manager and then earns 1L per month and this is how it goes on. This is generally typical software engineers life.