Lead Backend Engineer · Pune, India

Jitendra
Kumar

A highly skilled and results-driven Lead Backend Engineer with 7.5+ years of experience in backend development and building scalable, production-grade systems. Experienced in developing AI-enabled applications using LLM integrations, Retrieval-Augmented Generation (RAG), and prompt-driven workflows to enhance product capabilities and automate complex use cases.

Strong background in modern data engineering and analytical system design, including building high-performance data pipelines using CDC patterns, Apache Airflow, and leveraging ClickHouse as a speed layer alongside Snowflake for long-term storage. Experienced in designing data architectures that balance real-time performance with large-scale historical data processing.

Proven expertise in system design and distributed architectures, including caching strategies, load balancing, database sharding, and event-driven systems. Demonstrated leadership in mentoring engineers, driving technical decisions, and collaborating with cross-functional teams to deliver scalable, high-quality software solutions.

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Jitendra Kumar JK
7.5+
Years Experience
6
Engineers Led
500ms
Query OKR Achieved
10M+
Data Points / Query
3
LLM APIs Integrated
Technical Expertise

Skills & Stack

🖥️

Languages & Frameworks

Node.jsTypeScriptPython Nest.jsExpress.jsReact.js Next.jsFlask
🗄️

Databases & Data Warehouses

PostgreSQLMySQLMongoDB RedisClickHouseSnowflakePinecone
🤖

AI & LLM Systems

RAG ArchitectureOpenAIClaude API GeminiEmbeddingsSemantic Search Prompt Engineering
⚡

Messaging & Data Engineering

Kafka CDCDebeziumRabbitMQ Apache AirflowETL Pipelines
☁️

Cloud & DevOps

AWS S3LambdaRDS Elastic BeanstalkDocker GitHub ActionsKubernetes
🏗️

System Design (HLD / LLD)

MicroservicesCachingDB Sharding Load BalancingSOLIDOAuth2 / JWTCAP Theorem
Work History

Professional Experience

Madison Logic [Product-based]
Jan 2025 – Present
Lead Backend Engineer
  • Designed scalable microservices supporting high-volume production workloads
  • Integrated LLM APIs for AI-driven intelligent data retrieval and workflow automation
  • Built RAG-based retrieval flows with Pinecone vector search for enhanced relevance
  • Architected CDC + Apache Airflow + ClickHouse pipeline for real-time analytics
  • Designed ClickHouse speed layer + Snowflake long-term storage data architecture
  • Led team of 6 engineers — HLD/LLD, code reviews, mentorship, and delivery
  • Won internal hackathon for AI-driven lead scoring system
Binmile Technologies
Sept 2023 – Dec 2024
Senior Software Engineer
  • Spearheaded architecture design for scalable client projects
  • Conducted discovery calls and aligned on technical specifications
  • Led sprint breakdowns, code reviews, and mentorship for the team
Rubico Tech
June 2019 – Sept 2023
Backend Developer — Node.js
  • Built and maintained web apps using Node.js, React.js, and Laravel
  • Technical Point of Contact — requirement gathering to client delivery
Halexo Software
Sept 2018 – May 2019
Backend Developer — PHP
  • Built web applications using PHP and Laravel, focused on backend and database design
Built & Shipped

Recent Projects

Performance Engineering

Lead Dashboard Microservice

Queries 10M+ data points in milliseconds using ClickHouse optimizations — skip index, projections, low cardinality, materialised columns. Snowflake holds 20 years of history, synced via Streams every 8 hours. Hit 500ms OKR for all queries.

Nest.jsClickHouseSnowflakeTypeScript
Full-Platform Architecture

Blabber Mobile & Web App

Architected the entire platform across microservices. Complex multi-party payment distribution with PayPal & Stripe. Redis caching for distributed cron management. Event-driven authorization system for backend permissions.

Nest.jsPostgreSQLRedisRabbitMQKubernetesReact.js
E-Commerce

Eplaza Multi-vendor Store

Multi-vendor e-commerce platform built on Express.js. Designed the full database schema supporting complex vendor management flows, admin panel APIs, and mobile app integration.

Node.jsMySQLMongoDBFlutter
Recognition

Achievements

💳
Complex Payment System Multi-party fund distribution via PayPal & Stripe for Blabber
📧
Conversation Tracking Email & SMS tracking system using SendGrid and Telnyx
🎖️
Leadership Certified 21 Irrefutable Laws of Leadership certification
Academic Background

Education

Bachelor of Computer Application
Suresh Gyan Vihar University, Jaipur
202375%
Diploma — CS & Engineering
Govt. Polytechnic, Saharanpur
201874%
Intermediate
AGIC Chandak, Bijnor
201579%
High School
AGIC Chandak, Bijnor
201378%
Get In Touch

Let's Connect

Open to backend engineering leadership roles and exciting product challenges.

📧 jitendrakumar10898@gmail.com

📞 +91-7906748534  

✉️ Email 💼 LinkedIn 🐙 GitHub