Varun Dubey
Varun DubeySenior Software Engineer

Senior Software Engineer · ZS Associates

Building systems
that scale.

Backend-leaning engineer working across distributed systems, AI/LLM platforms and high-performance microservices — turning gnarly infrastructure into things that just work.

4+
Years shipping production systems
1500+
Servers monitored in real time
150k+
Docs indexed for RAG retrieval
60s→.5s
Endpoint latency optimized
Scroll to explore

01 — About

Crafting intelligent,
resilient software.

I'm a backend-leaning engineer with a track record across distributed systems and AI platforms. At ZS Associates I build AI-powered enterprise tooling; before that at Jio I owned large-scale cloud observability modules monitoring thousands of servers in real time.

I care about the unglamorous parts — latency budgets, failure modes, clean boundaries — because that's what lets the interesting parts ship.

Now

ZS Associates

Senior SWE · Bangalore

Before

Jio

SDE · Navi Mumbai

Focus

Distributed + AI

Systems & LLM platforms

Style

Backend-leaning

Pragmatic, resilient

02 — Toolkit

Stack & Tools

Python/JavaScript/TypeScript/SQL/FastAPI/Flask/Next.js/React/SQLAlchemy/LangChain/LangGraph/LangFuse/Docker/Kubernetes/Kafka/Redis/Azure DevOps/CI/CD/Elasticsearch/PostgreSQL/MySQL/Oracle/Kibana/Zabbix/NoSQL/Gen AI / LLM/Agile/Excalidraw/Python/JavaScript/TypeScript/SQL/FastAPI/Flask/Next.js/React/SQLAlchemy/LangChain/LangGraph/LangFuse/Docker/Kubernetes/Kafka/Redis/Azure DevOps/CI/CD/Elasticsearch/PostgreSQL/MySQL/Oracle/Kibana/Zabbix/NoSQL/Gen AI / LLM/Agile/Excalidraw/

// languages

04
PythonJavaScriptTypeScriptSQL

// frameworks & libraries

08
FastAPIFlaskNext.jsReactSQLAlchemyLangChainLangGraphLangFuse

// infra & devops

06
DockerKubernetesKafkaRedisAzure DevOpsCI/CD

// data & observability

07
ElasticsearchPostgreSQLMySQLOracleKibanaZabbixNoSQL

// methods & practices

03
Gen AI / LLMAgileExcalidraw

03 — Career

Experience

Senior Software Engineer

ZS Associates· Bangalore
Nov 2024 – Present
  • Leading Quill — an AI-powered medical-legal review platform: designed scalable microservices (FastAPI, Celery, Redis, pgvector) for RAG-based retrieval across 150k+ docs, deployed on Kubernetes.
  • Modernized a legacy monolith into a modular, horizontally scalable architecture with stateless services, async task queues, and layered design patterns.
  • Built a multi-agent orchestration framework (LangGraph) and integrated Langfuse for real-time LLM observability and prompt tuning.
  • Applied distributed systems principles — state decoupling, async processing, and layered architecture — to improve throughput and system reliability.

Software Development Engineer

Jio· Navi Mumbai
Jul 2022 – Nov 2024
  • Optimized 50+ FastAPI endpoints from 60s → <500ms using Python concurrency, connection pooling, and Elasticsearch query restructuring.
  • Built Kafka-based real-time data pipelines and Kubernetes KPI microservices for monitoring 1500+ government servers.
  • Designed ARP data collection pipelines achieving ~100% network topology visibility for project-wide network graphs.
  • Developed high-performance FastAPI microservices for real-time Kubernetes cluster monitoring across all levels.

04 — Work

Selected Projects

Archived

Dream Source POC

The original POC that sparked Dream Source. Early AI dream interpretation experiment, not actively maintained.

PythonAIDream Analysis
View Project
📄
Work Project

Quill — AI Review

Medical-legal document review platform with sentence-level RAG referencing across 150k+ docs.

LangGraphRAGFastAPIpgvector
Private / Work Project
📡
Work Project

Network Intelligence

Real-time network monitoring for 1500+ government servers — KPI tracking, Kafka streams, topology graphs.

FastAPIKafkaElasticsearch
Private / Work Project

05 — Connect

Let's build
something great.

Open to senior roles and interesting collaborations. The fastest way to reach me is a direct note.

varundubey771@gmail.com