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Payment API integration for a fintech startup

Early-stage fintech startup · 6 weeks to delivery

99.9%

Payment processing uptime

6

Weeks to delivery

65%

Reduction in payment-related support tickets

The challenge

The startup needed to connect to multiple payment processors and banks but had no infrastructure to handle webhooks, retries, or reconciliation. Their MVP was blocked on backend plumbing, not product ideas.

Our approach

We designed a cloud-native payment orchestration layer on AWS with webhook ingestion, idempotent transaction handling, automated reconciliation jobs, and a clean REST API their frontend team could call without touching payment provider SDKs.

Stack

AWS LambdaAPI GatewayDynamoDBSQSNode.jsTerraform

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