WIP — work in progress
Backend Engineer · Distributed Systems & AI

DIVYAM
BHUTANI

I architect and operate high-reliability payment systems — event-driven pipelines, reconciliation infra, and the occasional agentic AI experiment. 4 years across fintech and high-growth startups.

4 yrs
Experience
1 → 8
Team scaled
01 // Experience

Where I've shipped

Software Development Engineer — Team Lead
Juspay · Global Fintech Infrastructure · Jul 2022 – Dec 2025
Reconciliation & Settlement Platform
Solo Architect → Team Lead · Feb 2025 – Dec 2025
  • Architected the platform from day one — owned the production tech stack (Python, FastAPI, Kafka, PostgreSQL), system design, deployment, and operations end-to-end.
  • Scaled the team from 1 to 8 engineers; ran technical interviews, mentored, led design reviews, and drove sprint execution in a high-ambiguity environment.
  • Designed event-driven reconciliation pipelines with idempotent processing, retries, and fault-tolerant execution; established on-call, alerting, and SOPs for SLA adherence.
  • Built automation (web + Windows app) for settlement-file uploads to Visa and RuPay, eliminating manual midnight operations.
Open 3D system map
Card Payment Gateway
Jan 2024 – Feb 2025
  • One of four engineers scaling Juspay's card gateway from 0 → 10K+ daily transactions; led HSBC HK acquirer onboarding (non-3DS, SI/mandate/recurring).
  • Integrated the UnionPay network behind a pluggable payment abstraction — core logic centralised, each new integration only defines types and API calls.
  • Built key/certificate rotation and master-key encryption to securely store private keys in the DB, removing manual key management.
  • Improved throughput 2.5x (DB indexing, caching, execution-path optimization) and cut CI build time 35 → 4 min (8x) via dependency build caching and layer reuse.
Card Discovery Service
End-to-End Owner · Jul 2022 – Aug 2023
  • Sole engineer designing, building, and operating the microservice — Haskell, MySQL, Redis; deployed on Kubernetes (Autopilot) with CI/CD via Bitbucket & Jenkins.
  • Built logging & observability with Kibana, Prometheus, Grafana; partnered with Epifi, OneCard, and HDFC to tokenize 80K+ newly issued cards.
Software Development Engineer — Intern
Convosight · Remote (US startup) · Nov 2021 – Apr 2022
  • Built backend APIs with Node.js, Go, and Serverless on AWS (DynamoDB, S3, AppSync, Lambda); shipped Reviews and Notifications features.
  • Migrated Go Lambdas to TypeScript Node.js and built Metabase SQL dashboards with page-level analytics.
02 // Personal Projects

Built on my own time

Side projects where I chase curiosity — mostly agentic AI pipelines and developer tooling. Work projects live under Experience above.

03 // Stack

Tools of the trade

Languages
Python · Go · Haskell · SQL
Backend
FastAPI · Node.js · Haskell Stack · REST · Webhooks · Microservices
Data & Obs
Kafka · PostgreSQL · Redis · Prometheus · Grafana
Cloud & DevOps
AWS (S3, EC2, RDS, IAM, ECR, KMS) · Docker · Jenkins
AI & Integrations
LLM APIs (OpenAI, Anthropic) · Claude Code (Skills, MCP, Hooks) · Vertex AI
04 // Writing

Words & notes

What is the File System Module in Node.js?

A beginner-friendly walkthrough of file handling in Node.js — reading, writing, and working with the fs module.

Node.jsGeeksforGeeks

More coming soon

Notes on distributed systems, payments infra, and building with agentic AI. Drafts in progress.

SystemsFintech
05 // Contact

Let's build something

Open to backend and distributed-systems roles. The fastest way to reach me is email.