I will integrate payment gateway into your website

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asish_kr
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asish_kr
Asish Kumar

About this gig

Lost sales due to checkout bugs or failed webhooks?


A broken payment flow costs you real revenue and customer trust. Payment processing can't rely on copy-paste code.


I provide robust, production-grade payment integrations built to handle real traffic smoothly. Whether you're setting up a new gateway or fixing broken events, I ensure every transaction is captured securely.


What You Get

  • Complete Flow: Seamless checkout for one-time payments or recurring subscriptions
  • Secure Architecture: Strict server-side verification with zero exposed secret keys
  • Reliable Webhooks: Resilient listeners for success, failure, refund, and renewal events
  • End-to-End Testing: Rigorous sandbox testing across edge cases before going live
  • Clean Code: Well-documented, maintainable logic ready for production


️ Why Work With Me?

  • Zero Headaches: Built to eliminate duplicate charges, currency mismatches, and race conditions
  • Stack Agnostic: Works smoothly with any modern framework, custom build, or legacy stack


Please message me before placing an order!

Let's discuss your requirements to ensure the fastest setup.

Get to know Asish Kumar

Asish Kumar

your engineer who can build anything

  • FromIndia
  • Member sinceJan 2025
  • Avg. response time1 hour
  • Languages

    English
I am a backend and infrastructure engineer focused on Go, Java, Node, Javascript, Kubernetes, Kafka, distributed systems, and observability. My work includes Go services, Kubernetes deployment and operations, event-driven systems, PostgreSQL, Redis, gRPC, OpenTelemetry, Prometheus, Grafana, Docker, and Helm. I build and improve backend APIs, asynchronous workers, data pipelines, reliability tooling, and multi-tenant services. Open-source contributor with 150+ merged PRs, two Google Summer of Code terms, and an LFX mentorship.

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