I'm not the best person to tell you, so it's better to go to experienced professionals who will also help you build a solid and secure foundation for your project.
Right now, there's really no problem finding such experts contributing to Blockchain Security. I recommend learning more about the Pessimistic team that provides smart contract audit services. In addition to quality auditing and confidential reports, it's also ongoing subscription-based support as well as hacker activity monitoring systems like Spotter.