To be a security software developer 6 months of experience is not at all enough to be a security developer. You are still a fresher and with this experience, I don't think any company is going to recruit for this profile. I would suggest do not rush into your life, get good research on what and all you need to do to reach to that level and start working on that. I hope after working for 3 to 4 years you will be in that stage where you can choose your own career. So keep patience and learn first, then think about which path do you want to go.