Hi, I'm

Rahul Kumar Choudhary

Agentic AI & Distributed Systems Engineer

Founder of Poplitu • Senior Software Engineer

I architect distributed systems that serve 10M+ users at 99.9% uptime, and lead the cross-functional teams of 8 to 12 engineers who build them. Currently deep in Agentic AI, and building Poplitu from the ground up.

See what I'm building Get In Touch

50+

Projects

9+ Years

Years Experience

100%

Satisfaction

RKC

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About

How I work

Nine years of building systems that have to stay up, and the teams that keep them there.

I transform ambitious ideas into scalable digital realities. With 9+ years of architecting distributed systems and leading cross-functional teams of 8-12 engineers, I specialize in building enterprise-grade applications that handle 10M+ users with 99.9% uptime.

My expertise spans from crafting intuitive user experiences to designing robust microservices architectures across 50+ production systems. I'm passionate about Agentic AI development, creating intelligent systems that learn and adapt.

As an entrepreneur, I've built Poplitu from the ground up, proving that innovative thinking combined with technical excellence can create game-changing solutions. I thrive on solving complex problems, mentoring teams, and pushing the boundaries of what's possible in full-stack development.

Users served: 10M+; at 99.9% uptime
Team size led: 8-12; cross-functional engineers
Production systems: 50+; shipped and maintained

Building

Poplitu

The product I am building, and where the writing on this site comes from.

Three products on one platform, built and run by one person.

Forms: Describe a form and get one. Put it on a page, or inside somebody else's site.
Social: A publishing studio with an agent you can hand a goal and a mandate.
Copilot: Ask for the work across all of it, and see anything real before it commits.

What it does Visit poplitu.com

Writing

Problems, written up

Long pieces on agents and distributed systems, argued from a codebase rather than from opinion. Every figure in them is one you can check.

12 min read
The agent pauses. The human approves. The approval lands on a different machine.
ways a paused agent breaks in production
3
ways a paused agent breaks in production
of them raise an error
0
of them raise an error
8 min read
Docs are a wish. Review does not scale. So the rules run.
decisions held by a test
855
decisions held by a test
named as the claim they hold
146
named as the claim they hold
8 min read
Amazon left relational. Google came back. Both were right.
sourced claims
29
sourced claims
peer-reviewed papers
2
peer-reviewed papers

Read everything

One long piece, when there is one worth sending

Agents and distributed systems, argued from a codebase rather than from opinion. It goes out when a piece is finished and not on a schedule, so it will not fill your inbox.

Free. Unsubscribe whenever. Hosted on Substack.

Toolkit

What I build with

Grouped by the job it does rather than by category, and limited to what I actually reach for.

Agents and AI

Systems that decide and act, and the evidence that they are getting better.

LangGraph
LangChain
MCP
RAG
Vector databases
LLM evaluation
Human-in-the-loop design
Claude, GPT and Gemini APIs

Distributed systems

The part that decides whether any of it survives a second machine.

System design
Event-driven architecture
Queues and workers
Idempotency and retries
Caching strategies
Observability
PostgreSQL
Redis
BigQuery

Product engineering

What the whole thing is actually written in.

TypeScript
Node.js
NestJS
React
Next.js
Prisma
GraphQL
Python

Shipping and keeping it up

Getting it out, and knowing when it breaks.

Docker
Kubernetes
GCP and AWS
Terraform
CI/CD
Playwright and Jest
Load and failure testing

Experience

Professional Journey

9+ years of building scalable applications across agentic AI, fintech, e-commerce, edtech, and domain management platforms. Experience with leading companies like Thomson Reuters, GoDaddy, MetaMap, and ETMoney.

Years Experience

Companies

50+

Projects

10M+

Users Served

Career Journey

From Frontend Developer to Senior Agentic AI Engineer, working with industry leaders

9+ Years Experience

6 Leading Companies

Multiple Industries

Mercor
Jan 2026 - Present
Agent Evaluation Expert, Reviewer and Annotator
Contract work on frontier model and agent evaluation. Judging whether an agent did the right thing rather than whether it produced a fluent sentence, which for tool-using agents are very different questions.
Remote · Contract
Thomson Reuters via EPAM Systems
Jan 2026 - Jul 2026
Senior Agentic AI Engineer
Senior Agentic AI Engineer on the Thomson Reuters account, building agent systems end to end: the retrieval that grounds them, the tool layer they act through, the gate a person stands at, and the evaluation that decides whether a change made them better or only different.
Remote · Full-time
GoDaddy via EPAM Systems
Feb 2024 - Dec 2025
Senior Software Engineer
Senior Software Engineer on the GoDaddy account through EPAM Systems, building the domain management surfaces millions of customers use, and the services behind them.
Remote · Full-time
MetaMap
Nov 2022 - Oct 2023
Senior Software Engineer
Developed identity verification and KYC solutions for fintech companies. Built scalable APIs and frontend applications for digital identity verification services.
Remote · Full-time
ETMoney, Times Internet Pvt. Limited
Aug 2019 - Nov 2022
Senior Full Stack Developer
Developed financial technology solutions for ETMoney, a leading fintech platform. Built investment tracking, portfolio management, and financial planning tools.
Gurgaon, India · Full-time
ShopClues
Aug 2017 - Jul 2019
Software Engineer
Developed e-commerce platform features and user interfaces for ShopClues, one of India's leading online marketplaces. Focused on improving user experience and conversion rates.
Gurgaon, India · Full-time