To hire developers who understand fintech security best practices, platforms like Trio vet candidates specifically for practical experience in secure coding, regulated environments, and financial data protection. Developers who have worked within frameworks like PCI-DSS or SOC 2 have already had to apply security practices under real conditions, which tends to be a more reliable signal than certifications alone.
In your own assessment, ask candidates to describe a security vulnerability they encountered and how they handled it. Strong candidates can walk you through their approach to threat modeling, encryption at rest and in transit, and secrets management. Answers that stay at a high level probably warrant follow-up.
Developers who have worked on products that went through penetration testing or third-party security audits tend to bring a grounded perspective, because they have seen where theoretical security models meet the real world.