SurestPay
A secure, high-performance payment processing backend built on microservices. Engineered for resilience under traffic spikes, with a real-time transaction monitoring dashboard used in production.
The Challenge
SurestPay needed to onboard partner banks and vendors quickly while maintaining strict compliance and zero tolerance for dropped transactions. The existing integration process was slow and manual, and the team had no real-time visibility into transaction health across the system.
The Solution
I redesigned the API integration layer to be standardized and self-service for partner onboarding, cutting the process from weeks to days. On the infrastructure side, I built the payment processing backend on a microservices architecture with async queuing to absorb traffic spikes without losing transactions. For visibility, I shipped a real-time analytics dashboard that gave the ops team live insight into transaction volume, failure rates, and latency.
What I Built
Redesigned the financial API integration layer, standardizing the partner onboarding contract and cutting onboarding time by 40%
Built the payment processing backend on a microservices architecture with async queuing to absorb traffic spikes
Designed and shipped a real-time transaction monitoring dashboard with live metrics on volume, failure rates, and latency
Worked cross-functionally with compliance and product teams to ensure all systems met regulatory requirements
Implemented distributed tracing and audit logging across services for full transaction visibility
The Story
The onboarding bottleneck was the most urgent problem — partner banks were waiting weeks to integrate, and every week of delay was lost revenue. I mapped the integration flow end to end, identified the manual steps, and built a standardized API contract that partners could implement against with minimal back-and-forth. The dashboard came later, after a production incident where a spike in failed transactions went undetected for too long. I built the monitoring layer so that never happened again.
What I Learned
In fintech, every architectural decision is also a compliance decision. You can't optimize for speed without thinking about auditability. I also learned that the most valuable thing you can build for an ops team isn't a feature — it's visibility. The dashboard changed how the team operated more than any new feature did.
Technologies Used
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