---
title: "Sanjay Chaudhari - Lead Application Developer (App Modernization) in Pune | Tal"
description: "Meet Sanjay Chaudhari, Lead Engineer at AWS | Cloud Architect · .NET Modernization · Distributed Systems · Serverless · GenAI/ML | 6x AWS Certified · Azure Certified based in Pune. AI stack includes claude code, claude, and gemini. Explore public work links including github."
image: "https://tal.club/meet/sanjay-chaudhari/share-image"
---

# Sanjay Chaudhari on Tal

## Headline

Lead Engineer at AWS \| Cloud Architect · \.NET Modernization · Distributed Systems · Serverless · GenAI/ML \| 6x AWS Certified · Azure Certified

## About

I help enterprises modernize \.NET workloads and move confidently to the cloud, re\-architecting legacy Windows applications into serverless and containerized solutions on AWS, and modernizing Microsoft\-based systems across AWS and Azure\. With 12\+ years in full\-stack and cloud development, I lead modernization engagements end\-to\-end: designing cloud\-native architectures, building \.NET services, establishing infrastructure\-as\-code standards, and guiding customer teams to delivery\. My sweet spot is the intersection of the Microsoft stack and modern cloud \- taking WebForms/WCF/EC2\-era applications and re\-platforming them onto Lambda, ECS Fargate, EventBridge, and managed services without losing the business logic that matters\. A few outcomes I'm proud of: • Cut total cost of ownership by 34% on a legacy API modernization • Saved customers $100K\+/year by eliminating always\-on Windows licensing • Reduced a test bundle \(98MB → 3\.5MB\) via AWS SDK v3 modularization I'm also deepening my focus on Generative AI and ML on AWS , certified across Generative AI, Machine Learning, and AI foundations, bringing modern AI capabilities into enterprise \.NET modernization\. I share what I learn, too \- authoring AWS technical blogs and open\-source samples \(AppSync \+ \.NET Lambda resolvers, LocalStack dev kits, CoreWCF modernization\) adopted by the \.NET\-on\-AWS community\. Certifications: \- AWS Solutions Architect – Professional \- AWS Generative AI Developer – Professional \- AWS Machine Learning Engineer – Associate \- AWS Solutions Architect – Associate \- AWS Developer – Associate \- AWS AI Practitioner \- Microsoft Certified: Azure Solutions Architect Expert Technical Skills: \- Cloud: AWS and Azure \- IaC: Terraform, AWS CDK \- Application Hosting: IIS, AWS Elastic Beanstalk, Azure App Service, ECS Fargate & Docker \- Serverless: AWS Lambda & Azure Functions \- Frameworks: \.NET Framework & \.NET Core / \.NET 8 \- Microsoft Stack: C\#, ASP\.NET WebForms/MVC/Web API, WCF, CoreWCF, Windows/Worker Services \- ORM: LINQ and Entity Framework / EF Core \- Frontend: JavaScript, TypeScript, jQuery, Angular, Telerik \- Web: HTML, CSS, JSON, XML, Bootstrap, Node\.js \- Databases: SQL Server, MySQL, Cosmos DB, DynamoDB, MongoDB \- Messaging/Events: SQS, SNS, EventBridge, Azure Storage Queue \- Security: OAuth2\.0, OpenID, JWT, Amazon Cognito, Azure AD \- DevOps/Tools: Azure DevOps, Git, GitLab, JIRA

## Location

Pune

## AI stack

claude code

claude

gemini

github copilot

grok

kiro

mcp

notion

openai

claudecode

githubcopilot

## Work experience

Lead Application Developer \(App Modernization\) at Amazon Web Services \(AWS\), Dec 2023 \- Present · 2 yrs 8 mos, Pune District, Lead \.NET modernization for enterprise AWS customers : designing cloud\-native architectures, establishing infrastructure\-as\-code standards, and mentoring teams\. I also author AWS technical blogs and open\-source samples for the \.NET\-on\-AWS community \(see attached\)\. • Healthcare SaaS : Platform Modernization: Founding engineer consolidating two legacy systems into a unified claims\-processing platform\. Designed the technical architecture and database schema, built \.NET 8 \(C\#\) API endpoints and background services, and created reusable Terraform modules provisioning DynamoDB, EventBridge, SQS, and SNS : adopted org\-wide as a Terraform catalog\. Demonstrated value grew the team from 6 to 13 and the SOW from $2\.19M to $4\.36M \(99% growth\)\. Consistent 5/5 stakeholder feedback\. • "Warrior" Team : Accelerated Delivery: Founding member delivering core microservices \(App Configuration, User Assignment, Provider Registry\) on an aggressive timeline with no dedicated QA\. Filled the gap by building a complete Cucumber E2E automation framework, achieving 100% test coverage\. • AWS SDK Modernization: Ahead of AWS SDK v2 end\-of\-support, drove migration to v3 using modular, service\-specific clients : cutting test bundle size 96% \(98MB → 3\.5MB\), reducing cost and install times, and future\-proofing security\. Pattern adopted org\-wide\. Tech: \.NET 8, C\#, Terraform, AWS \(DynamoDB, EventBridge, SQS, SNS, Lambda, AppSync, CDK\), PostgreSQL, Cucumber

Application Developer \(App Modernization\) at Amazon Web Services \(AWS\), Dec 2021 \- Nov 2023 · 2 yrs, Delivered hands\-on \.NET modernization for enterprise customers, re\-architecting legacy Windows workloads into serverless and containerized solutions on AWS : consistently cutting cost and improving scalability\. • Insurance & investment customer: Led 3 workstreams to modernize a legacy Submission API — ported \.NET to \.NET Core on Amazon ECS Fargate, centralized config via AWS Parameter Store \(hierarchical, template\-based provisioning\), and added observability with Serilog and X\-Ray\. Cut TCO by 84% \(USD 1,659 → 259/month\), improved provisioning time 25%, and reduced config\-management effort 40%\. • Title & real estate customer: Modernized a monolith into an event\-driven architecture on AWS Lambda and EventBridge\. Built a reusable EventBridge integration library and replaced a socket\-based scheduler with EventBridge Scheduler for serverless batch orchestration\. Eliminated 22 always\-on Windows instances \(\~USD 65K/year\)\. • SaaS risk & insurance customer: Stepped in as modernization lead during a team emergency, designing an "API Gateway Wrapper" for JWT and API Key auth in a 4\-day turnaround\. Root\-caused a blocking HTTP 403 \(a \.NET HttpClient URL path\-merging edge case\), unblocking migration to ECS Fargate\. Saved 15 Windows Server licenses \(\~USD 108K/year\)\. • Time\-tracking SaaS customer: Modernized legacy WCF services \(\.NET Framework 4\.x\) to CoreWCF with backward\-compatible patterns across \.NET Framework and \.NET 6\. Built a PoC proving Prometheus metrics on \.NET 6 to unblock migration\. Saved 8 Windows Server licenses \(\~USD 48K/year\) and co\-authored the Microsoft Workloads blog "Modernization of WCF services to CoreWCF," open\-sourcing the code\. Tech: \.NET Core, C\#, CoreWCF, ECS Fargate, Lambda, EventBridge, Parameter Store, X\-Ray, Serilog, EF Core, Docker

Application Development Assoc Manager at Accenture, Jun 2021 \- Dec 2021 · 7 mos, Pune Division, Promoted to Associate Manager, taking on broader delivery ownership and people leadership on top of hands\-on technical direction for \.NET and Azure application teams\. • Owned end\-to\-end delivery and technical decisions across projects, upholding architecture and CI/CD standards established as Team Lead\. • Managed and mentored engineers, coordinated offshore resources, and drove estimation, planning, and stakeholder communication\. • Partnered with stakeholders on feasibility, prioritization, and performance improvements for ongoing \.NET/Azure workloads\.

Application Development Team Lead at Accenture, Sep 2017 \- Jun 2021 · 3 yrs 10 mos, Pune, Led application development teams building web frameworks and cloud solutions on the Microsoft and Azure stack, owning technical direction, delivery, and mentoring\. • Built Web API \(\.NET Framework and \.NET Core\), MVC, and ASP\.NET applications integrated with a broad range of Azure services: Service Bus \(Queues, Topics/Subscriptions\), Storage \(Blob, Table\), Application Insights, Azure SQL Database, Logic Apps, Azure Functions, Integration Accounts, Redis Cache, Cosmos DB, MySQL, and Azure Active Directory\. • Proficient in Entity Framework across multiple database design approaches, tracking and maintaining migrations over MS SQL, PostgreSQL, MySQL, and SQLite\. • Designed and automated CI/CD pipelines enabling one\-click releases : covering code\-quality checks, code coverage, unit and automated test cases, database migrations, and release plans\. • Performed technical feasibility analysis for new functional designs and recommended performance improvements for technical components\. • Conducted candidate interviews to meet cross\-organization project demands, and guided offshore junior engineers on functional and technical issues\. Tech: C\#, \.NET Framework, \.NET Core, Web API, MVC, ASP\.NET, Entity Framework, Azure \(Service Bus, Functions, Logic Apps, App Insights, Cosmos DB, Redis, Azure AD, Storage\), MS SQL, PostgreSQL, MySQL, SQLite

Sr Software Developer at Decos Software Development, Oct 2015 \- Sep 2017 · 2 yrs, Pune/Pimpri\-Chinchwad Area, Built JKC, a citizen\-communication platform for Netherlands government offices, managing directcommunication channels between municipalities and their citizens\. • Developed the web interface in AngularJS with a C\# / Web API backend, and integrated social channels \(Facebook, Twitter\)\. • Wrote NHibernate data\-access queries against Azure SQL and client\-side logic in JavaScript/TypeScript\. Tech: C\#, Web API, NHibernate, AngularJS, JavaScript/TypeScript, Microsoft Azure

System Analyst at Nihilent Technologies, May 2014 \- Sep 2015 · 1 yr 5 mos, Pune/Pimpri\-Chinchwad Area, Delivered Tumbhi, an online talent\-showcase platform where artists host multimedia portfolios across categories like fashion, photography, and music, with events, blog, news, and contest modules\. • Built the front end using ASP\.NET MVC 5 \(Razor views/partials\) with AngularJS, backed by C\#\. • Wrote stored procedures and functions against Azure SQL; implemented AJAX and client\-side interactions with JavaScript/jQuery\. Tech: ASP\.NET MVC 5, C\#, ADO\.NET, AngularJS, JavaScript/jQuery, Microsoft Azure

ASP\.Net Software Engineer at Custom\-Soft, Aug 2012 \- Apr 2014 · 1 yr 9 mos, Pune/Pimpri\-Chinchwad Area, Developed LTC\-AMS, online accounting software for small businesses covering Income, Expense, Transfer, Adjustment, and Tax modules, with financial reports \(Aged Receivables/Payables, Balance Sheet, Profit & Loss, Trial Balance\) exportable to Excel, CSV, HTML, and PDF\. • Built the ASP\.NET Web Forms / C\# application and used Entity Framework with MySQL for data access, plus stored procedures and functions for accounting reports\. • Created client\-side plugins for pagination, search, and PDF generation using JavaScript/jQuery\. Tech: C\# \.NET 4\.0, ASP\.NET Web Forms, Entity Framework, MySQL, JavaScript/jQuery

## Education

M\.Sc, Comp Sci, Savitribai Phule Pune University

B\.Sc, Comp Sci, Savitribai Phule Pune University

## Public links

- github: https://github\.com/sanjay\-chaudhari

[View the original profile](https://tal.club/meet/sanjay-chaudhari)

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