Payments work is mostly about state, retries, and edge cases. A provider times out, a webhook arrives twice, a withdrawal needs review, or finance needs to explain why two systems disagree about a balance.

We help design and build payment flows that are easier to reason about, test, and audit across product, finance, and operations.

Typical work

• Stripe, Adyen, Circle, custody APIs, and custom provider integrations
• Deposits, withdrawals, refunds, disputes, and payout states
• Ledger design and reconciliation flows
• Webhook handling, retries, idempotency, and audit trails
• Admin tools for support, finance, and operations
• Crypto address checks, risk scoring, and transaction monitoring