Hello

I dont think you can become a software engineer after getting a btech from textile. If you wish to do software engineering the go for that branch instead of struggling to go to software through textiles . Textile engineering is a branch of engineering that deals with the garment, colour and fabric line of industries. It is the science that deals with all activities and methods which are involved in the process of textile manufacturing. A software engineer is a person who applies the principles ofsoftware engineering to the design, development, maintenance, testing, and evaluation of computer software

These are both entirely separate entities. 

If your undergraduate degree is not in computers or a related field, then you can apply for a 2-year graduate degree in Computer Science, Information Technology or Software Engineering. These Master's degrees typically require a GRE and offer the same path to a career in Software Engineering.

The market demand for qualified software engineers has created an arms race for the top talent. Salary research from ComputerWorld, the Bureau of Labor Statistics and Robert Half International all reveal the same thing: Companies are willing to pay a premium to acquire top talent, with some annual salaries pushing northward of six figures. ComputerWorld’s  IT salary survey reported average salaries of nearly $109,000 for software engineers, while Robert Half reported earnings that range from $96,000 to $147,000.