I am a React.Js, React Native developer and have experience of almost 2+ years in this field. I am also a full stack developer and this is my production site that I have built from scratch (www.rehyped.com). I have experience in not only React Js but also in React Native, currently I am build a new App using it for Open Sourcing it's code so everyone can see and learn from it.
Apart from being a developer I am also an Ethical Hacker/ Web Application pentester. Whenever I build a web application I always build it with a mindset of a hacker.
Think it this way, if police don't know how criminals think and work how will they catch them?
Similarly, if a developer doesn't know how hackers think and do their task how ill they protect against them. When, someone gives me a project he /she can expect it to be safe and secure.