UPI integration — the spec quirks no one mentions
UPI is the most popular payment rail in India. The spec is precise. The implementation guides are not. Notes on the integration details that ate weeks the first time.
Unified Payments Interface (UPI) is India's real-time payment system operated by NPCI. Articles cover UPI integration patterns, settlement pipeline design, and the engineering architecture needed to handle UPI's high-throughput, low-latency transaction processing requirements.
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UPI is the most popular payment rail in India. The spec is precise. The implementation guides are not. Notes on the integration details that ate weeks the first time.
All posts on this site are written by Pratik Dhanave, an Agentic AI Architect with 7+ years building production distributed systems, multi-agent AI platforms, and cloud-native infrastructure. About the author → Each article includes working code, architecture diagrams, and references to the specific frameworks and standards discussed. Browse all posts or explore related topics using the tag cloud above.