Full-stack · AI systems

Hello, I'm

Software Engineer at Marsh McLennan — full-stack developer focused on React, FastAPI, and AI-powered systems.

PythonTypeScriptGolangReactAI/ML
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Sudhanshu Shekhar

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Projects

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DSA Problems

LeetCode

Codeforces

Profile

About me

Full-stack engineer focused on scalable systems, product impact, and clear craft.

Senior Engineer

Marsh McLennan

May 2025 – Present

AI systems

RAG & LangChain

30% faster responses

Competitive coder

LeetCode Knight

Top 5.2% · 1867 rating

I am a Senior Engineer at Marsh McLennan with expertise in full-stack development and AI-powered solutions. I specialize in building scalable applications using React, FastAPI, Django, and Golang.

My experience includes developing RAG algorithms, LangChain agents, microservices architecture, and enterprise-level platforms. Previously at Chat360, I engineered AI chatbots, voice bots, and marketing automation systems serving 100,000+ daily users.

I'm passionate about competitive programming with a LeetCode Knight title (top 5.2%) and Codeforces Specialist rating.

Languages

PythonJavaScriptTypeScriptGolangSQLC/C++

Backend

Node.jsExpress.jsFastAPIDjangoPostgreSQLMongoDBRedis

Frontend

React.jsNext.jsAngular.jsTailwind CSS

DevOps & AI

DockerAWSNginxCaddyLangChainPineconeOpenAIRAGRabbitMQKafka

Career

Experience

Shipping production systems, AI features, and platforms used at real scale.

Marsh McLennan

Senior Engineer – Application Development

May 2025 – Present

Pune, Maharashtra

  • Working on a global sourcing and procurement platform for the Marsh McLennan Global Procurement team
  • Developed a comprehensive Supplier Management module using ReactJS and FastAPI
  • Leading the development of a revamped UI with a modern, responsive design system
  • Collaborating with cross-functional teams to optimize API performance
Chat360

Software Engineer

June 2024 - April 2025

Pune, Maharashtra

  • Engineered RAG algorithms, LangChain agents, and Agentic AI using OpenAI, LangChain, Pinecone, and AWS Boto, resulting in a 30% reduction in response time
  • Designed a bulk email system using Django, Redis, PostgreSQL, RabbitMQ, Celery, and SparkPost, enabling over 100,000 emails per day with 99.9% reliability
  • Developed an AI-powered voice bot solution on a Golang microservice architecture using Google Speech-to-Text and Text-to-Speech APIs
  • Built features for live chat, bot-flows, and WhatsApp campaigns, leading to a 15% increase in user engagement
  • Led the development of an end-to-end app for the Salesforce AppExchange marketplace, increasing client integration capabilities by 25%

Open source

GitHub

Public activity, languages, and contribution rhythm.

GitHub Stats
Top Languages
GitHub Streak

Contribution Calendar

GitHub contribution graph

Selected work

Projects

Full-stack applications, product builds, and experiments — each with clear scope and stack.

PostEaze

Social media management platform enabling businesses to integrate and manage multiple social channels from a unified dashboard

  • AI-driven content optimization
  • Multi-platform scheduling
  • Analytics & reporting
GolangPostgreSQLRedisReactMantine UIDocker

PostCard

Social media web app with topic-based communities, real-time notifications, and 99 Lighthouse score

  • Community-based access control
  • Real-time notifications
  • 25+ active users
Next.jsMongoDBTypeScriptTailwind CSSClerk

ShareMe

Image sharing social media platform with pin-style content organization

  • Google OAuth
  • Image upload & sharing
  • Category-based browsing
React.jsSanity.ioTailwind CSS

Showing 1-3 of 7 projects

Problem solving

Competitive programming

Platforms where I practice algorithms and contest speed.

LeetCode

Knight
1867

Top 5.2% • Contest Rating: 1867

  • 1000+ problems solved
  • Knight badge
  • Regular contests
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Codeforces

Specialist
1440

Specialist badge • Max Rating: 1440

  • Specialist badge
  • Max rating 1440
  • Regular contests
View Profile

CodeChef

4 Star
4★

4 Star coder with consistent performance

  • 4 star rating
  • Long challenges
  • Cook-offs
View Profile

Contact

Let's connect

Open to opportunities and interesting collaborations. Send a note — I'll reply as soon as I can.