Hiring Fintech Developers: 7 Things to Verify Before You Sign

1. Ask for fintech-specific work, not just 'web development'

General full-stack experience doesn't automatically transfer to fintech. Ask candidates to walk you through a past project that involved handling money, sensitive personal data, or real-time market data specifically - the failure modes in those domains (race conditions on balances, reconciliation errors, feed disconnects) are different from a typical SaaS CRUD app.

2. Verify their approach to security, not just their claims about it

Anyone can say 'we take security seriously.' Ask for specifics: How do they handle secrets and API keys? Do they run dependency vulnerability scanning? How do they implement authentication - and do they understand the difference between authentication and authorization in a multi-tenant financial system? A developer who can talk fluently about OWASP Top 10 items relevant to your product (broken access control, injection, sensitive data exposure) is a good sign.

3. Check how they handle third-party financial integrations

Payment gateways, banking APIs, and exchange connections all have quirks - rate limits, webhook reliability issues, sandbox-vs-production discrepancies. Ask about a specific integration they've shipped (Stripe, Plaid, a specific exchange API) and how they handled failure scenarios like a webhook that never arrives or a payment that succeeds on the provider's side but the confirmation call times out.

4. Understand their testing and deployment process

In fintech, a bug in production can mean real financial loss, not just an inconvenience. Ask whether they write automated tests for money-handling logic specifically, how they stage deployments, and whether they have a rollback plan. A team that ships directly to production with no staging environment is a red flag for anything beyond a prototype.

• Do they use feature flags for risky changes?
• Is there a staging environment that mirrors production data shapes (with test data)?
• What's their incident response process if something breaks after a deploy?

5. Ask about compliance awareness (even if you handle compliance separately)

You don't need your developer to be a compliance officer, but they should understand basic constraints - PCI DSS if you touch card data, KYC/AML data handling requirements, or data residency rules if you operate across regions. A developer who has never heard these terms may build something that works technically but creates compliance headaches later.

6. Look at communication and reporting cadence

Long fintech builds fail more often from poor communication than poor code. Ask how they report progress - regular demos, written updates, a shared project board - and how they handle scope changes mid-project.

7. Get a small paid trial before a large commitment

For any engagement above a few thousand dollars, we recommend starting with a smaller, well-scoped paid milestone - a technical design document, a proof-of-concept integration, or a single feature. This de-risks the relationship for both sides and gives you real evidence of how they work before a larger commitment.