Hey Ram, some of the skills required for becoming a Security Software Developer are as follows:
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Windows, UNIX and Linux operating systems 
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C, C++, C#, Java, ASM, PHP, PERL 
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TCP/IP-based network communications 
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Relational databases (e.g. SQL, MySQL, SQLite, etc.) 
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Hypervisors (e.g. VMware, KVM, etc.) 
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Python Experience in HTML/CSS 
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XML/Web Services, AJAX 
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Cloud computing