DivyMohanRai

Backend EngineerBangaloreSince MMXIX

I build reliable backends at Zamp Finance. Previously three years at Refyne on KYC, rewards, and the integrations that hold a fintech together. I write about systems, ship the rest on GitHub.

Work History

— Present

Zamp Finance

Backend Engineer
GoFastAPIGCPK8sNext.jsNew Relic
  • Owning core backend services that process treasury operations end-to-end — designing for both correctness and scale.
  • Working across Go services and Python ML utilities, with a strong emphasis on idempotency, retries, and observability via New Relic.
  • Contributing to the platform vision: making finance work at infinite scale, with reliability as a first-class concern.
—

Refyne India

SDE — 2 (Early Member)
NestJSFastAPIAWSK8sNext.jsElasticPostgresRedis
  • KYC engine — built from scratch. Verification time dropped from 3 minutes to 2 seconds. Conversion rates lifted from 20–25% to 70–75% per day, outperforming industry standards. Processed 500,000+ users in a year with zero reported issues.
  • Rewards system — designed and shipped from scratch including scratch cards and virtual rewards. Organised the first Refyne festival, hitting a record DAU of 70,000 in 2023 and driving a 35% lift in user retention.
  • Major client integrations — led integrations with Swiggy (₹102 cr disbursed to delivery partners) and Teleperformance. Designed Data Pipeline Frameworks processing 1M+ unstructured data points in under a minute.

Selected Projects

No.ProjectDescriptionLink
01HandWrittenConverts digitally typed text into handwritten script. Trained on a custom dataset of real handwriting samples.
02Neural Style TransferImage stylization built from the Gatys et al. paper, with a companion blog post walking through the math.
03XmemeMeme-sharing platform with auth, feeds, reactions. Built as part of Crio Winter of Doing.
04Personal WebsiteThis very portfolio. Next 15, Tailwind v4, MDX, Firebase counters — rebuilt from scratch in 2026.

Recent Writing

· 6 min

From Postman to bruno: Making the Switch to a Better API Testing Tool

Why Postman might not be the ideal API exploration and testing tool. And how my search for an alternative tool led to an open source contribution

· 3 min

Neural Style Transfer using Python

What is Neural Style Transfer, on which algorithm is it based, and how to build it using Pytorch