Senior .NET Developer, 14+ years, Azure AI Engineer certified

SARITA NAG

Senior .NET Developer

Microsoft Certified: Azure AI Engineer Associate

************@*****.***

SUMMARY

Senior .NET and Full Stack Engineer with 14+ years of experience building and modernizing enterprise platforms using C#/.NET, ASP.NET Core, REST APIs, SQL Server, Angular, React, and cloud technologies. Proven player-coach who guides technical direction, mentors developers, and delivers scalable services through modern architecture, CI/CD, observability, and secure engineering practices. Experienced across financial services, insurance, and enterprise software.

CORE TECHNICAL SKILLS

•Backend Engineering: C# 12, .NET 8, ASP.NET Core 8, REST APIs, microservices, Domain-Driven Design (DDD)

•Architecture & Patterns: API Gateway patterns, CQRS, Event-Driven Architecture, secure coding practices

•Frontend: Angular 19, TypeScript, React 18, Hooks, Redux Toolkit, jQuery, Bootstrap, Kendo UI, Telerik

•Web Technologies: Razor, SignalR, LINQ, AutoMapper, AJAX, LESS, OAuth2, OpenID Connect, SSO

•Databases: SQL Server 2022, Azure SQL, PostgreSQL, Oracle 10g, MongoDB/Atlas, Redis, Snowflake, Cosmos DB

•Middleware: Web API, REST API, WCF, Entity Framework Core

•Testing & Quality: xUnit, NUnit, MSTest, Moq, Selenium, Postman, Swagger/OpenAPI, SonarQube, Test-Driven Development

•DevOps & Monitoring: Azure DevOps, Git, GitHub, GitHub Actions, Jenkins, Dynatrace, Splunk, Amazon CloudWatch, Application Insights

•Cloud & Containers: Azure (App Services, Functions, Key Vault), AWS (EC2, S3, Lambda, EKS), Docker, Kubernetes

•OS & Scripting: Windows, Linux, PowerShell, Bash

•Tracking & Documentation: JIRA, Confluence, Rally, SNOW, Bugzilla, Trello

•Development Tools: Visual Studio 2022, VS Code, NuGet, SoapUI, Fiddler, ReSharper

•Document Processing: PDF/Word/Excel ingestion, text extraction, embedding generation, Azure Cognitive Services

•AI & Agents: AI Agents, Agentic Workflows, Azure OpenAI (GPT models, embeddings), RAG pipelines, Vector DB, Semantic/Hybrid/Vector Search, Claude 3/3.5 Sonnet, LLMs

PROFESSIONAL EXPERIENCE

FISERV Aug 2022 – Sep 2026

Software Engineering Development Advisor, IBerkeley Heights, NJ

BillMatrix Next – Enterprise Billing & Payment Platform. Engineered full-stack enhancements across the UI, backend services, REST APIs, and SQL layers, modernizing legacy components to improve performance, scalability, and security. Led modernization of a high-volume payment platform, integrating AI-driven monitoring, cloud-native architecture patterns, and automated CI/CD pipelines. As a player-coach, guided technical direction while contributing hands-on code and elevating developer productivity through AI-assisted engineering.

Key Responsibilities & Achievements:

•Delivered secure, scalable features by implementing OAuth2, OpenID Connect, SSO, JWT authentication, and role-based access controls, strengthening platform security, authorization, and regulatory compliance.

•Developed reusable Angular components, shared modules, Reactive Forms, services, and routing solutions for enterprise-scale web applications.

•Worked as a full-stack developer, applying Angular dependency injection, RxJS, lazy loading, and state management patterns to improve maintainability, scalability, and performance.

•Designed and supported full-stack enterprise applications comprising Angular and React frontends, .NET APIs, SQL Server databases, authentication services, and third-party integrations.

•Implemented service-oriented and API-driven architectures to enable scalable, loosely coupled enterprise solutions.

•Built and optimized .NET 8 REST APIs and Razor-based web applications using LINQ and AutoMapper, enhancing performance, scalability, and reliability across enterprise billing and payment platforms.

•Optimized database performance through query tuning, indexing strategies, execution-plan analysis, and stored procedure optimization.

•Refactored SQL Server stored procedures, triggers, views, and functions to increase throughput, reduce latency, and improve high-volume transaction processing.

•Modernized legacy .NET applications by refactoring monolithic components, improving maintainability, and migrating functionality to modern web architectures.

•Diagnosed and resolved complex issues spanning frontend UI, backend APIs, integrations, databases, and cloud infrastructure.

•Performed API validation, contract verification, and integration testing using Postman, Swagger/OpenAPI, test-driven development, and automated testing frameworks.

•Leveraged Git-based workflows including branching, pull requests, code reviews, and release management; applied SonarQube static analysis and quality gates to improve code quality and security compliance.

•Utilized MongoDB and Mongo Atlas for NoSQL workloads, high-volume data storage, and distributed application architectures.

•Leveraged GitHub Copilot, Claude, and AI-assisted workflows to accelerate code generation, testing, documentation, code reviews, and developer productivity.

•Designed asynchronous, event-driven architectures using .NET Task Parallel Library (TPL), async/await, and Azure messaging services.

•Built scalable queue-based processing with Azure Service Bus, event-driven integrations, and background worker services; handled high-volume workloads with reliable message processing and dead-letter queue management.

•Built and deployed Generative AI solutions using Azure AI Foundry, Azure OpenAI Service, and Azure AI Search, including AI-powered copilots, intelligent document processing, RAG applications, and enterprise knowledge assistants, with prompt orchestration, grounding strategies, model evaluation, and responsible AI controls.

•Developed resilient systems using Polly retry policies, circuit breakers, rate limiting, throttling controls, centralized exception handling, and observability tooling.

Environment: C# 12, .NET 8, ASP.NET Core 8, EF Core 8, REST API, SQL Server 2022, Vector DB, Azure, GitHub Copilot, Claude, Angular 19, React, HTML5, CSS3, JIRA, Confluence, Splunk, LINQ, Razor Pages, AutoMapper, Web API, GitHub Actions (CI/CD), OAuth2, OpenID Connect, SSO, Visual Studio 2022, VS Code, Postman, Python, Azure AI Search/Foundry, Azure OpenAI, Snowflake, Cosmos DB, MongoDB, Selenium, document ingestion pipelines

FM GLOBAL Apr 2021 – Aug 2022

Software Engineer, Johnston, RI

AMD & RATS – Property Insurance Risk Analysis Platform. Delivered full-stack enhancements across Angular, C#, and SQL Server to improve the accuracy, responsiveness, and reliability of FM Global's RATS and AMD risk-analysis platforms; optimized SQL stored procedures, modernized legacy components, and strengthened performance.

Key Responsibilities & Achievements:

•Delivered full-stack development using Angular, React, C#, ASP.NET Core, and SQL Server across enterprise risk-analysis applications.

•Designed SQL stored procedures, triggers, views, and user-defined functions (UDFs) supporting enterprise applications.

•Supported legacy applications, performed enhancements, and resolved complex production issues.

•Developed React components and micro-frontends using React 18, Hooks, and Redux Toolkit to modernize internal risk-analysis platforms.

•Collaborated with product, QA, DevOps, security, and business teams to deliver enterprise features and resolve critical production incidents.

•Participated in Agile ceremonies including Sprint Planning, Daily Scrum, Backlog Refinement, Retrospectives, and PI Planning.

•Created and maintained solution architecture documentation, API specifications, integration workflows, and deployment diagrams.

•Provided technical leadership and mentored junior and mid-level engineers on .NET, microservices, cloud architecture, secure coding, and engineering best practices.

•Developed unit and integration tests using xUnit and Moq, applying test-driven development to improve reliability and reduce regression defects.

•Utilized Dynatrace, CloudWatch, Application Insights, and Splunk for observability, troubleshooting, and performance monitoring.

•Developed and supported applications in Windows and Linux environments using PowerShell and Bash scripting.

•Implemented containerized solutions using Docker and Kubernetes for scalable, highly available deployments.

•Implemented Dependency Injection, Lazy Loading, TPL, and other performance-focused patterns, and reduced deployment time by 40% through CI/CD automation (Azure DevOps, GitHub Actions, Jenkins) and expanded test coverage.

Environment: C#, MVC5, Angular 17, React, Jasmine, Razor, LINQ, AJAX, .NET 4.5, VS 2019, CSS3, HTML5, JSON, ES6, jQuery, Bootstrap, AutoMapper, Syncfusion EJ2, SQL Server 2017, Git, Azure Application Insights, EF Core, SSO

COMMVAULT SYSTEMS Oct 2016 – Mar 2021

Business Application Developer, Tinton Falls, NJ

Worked across multiple enterprise applications including Education Advantage, CQC (Quote-to-Order), and Alexandria Knowledge Base, contributing to full-stack development, modernization, and performance optimization.

Key Responsibilities & Achievements:

•Developed internal enterprise tools using C#, MVC5, LINQ, and Entity Framework Core, improving system reliability and accelerating feature delivery across multiple business applications.

•Migrated legacy MVC modules to Angular 15, significantly enhancing UI performance, maintainability, and user experience for high-traffic internal platforms.

•Built rich WPF/MVVM applications with advanced XAML animations, transforms, and storyboards, delivering modern, responsive interfaces for complex workflows.

•Designed and optimized SQL Server stored procedures, triggers, views, and UDFs to support high-volume operations, improving query performance and reducing processing time.

•Strengthened engineering quality by applying SOLID principles, repository patterns, CI/CD pipelines, and automated tests using xUnit, Jasmine, Moq, and Fluent Assertions, while performing code reviews, refactoring, and debugging across UI and backend layers.

Environment: C# 6.0/8.0, MVC5, Angular 15, React, TypeScript, HTML5, CSS3, PUG, JSON, JavaScript, jQuery, NodeJS, WPF, XAML, MVVM, Web API, .NET Core, .NET Framework 4.5, LINQ, AutoMapper

ZYLOG SYSTEMS May 2016 – Oct 2016

Senior .NET Consultant, Wyckoff, NJ

Developed the Takeda scheduling and pharmaceutical education platform using ASP.NET MVC, SQL Server, Bootstrap, and Jenkins CI/CD.

•Developed the Takeda scheduling application using C#, ASP.NET MVC, LINQ, SQL Server, Bootstrap, and AJAX, delivering a fast, reliable, user-friendly workflow for medical professionals.

•Built responsive UI components with jQuery widgets, dynamic client-side interactions, and optimized AJAX calls to improve usability and reduce page load times.

•Designed and optimized backend logic and SQL operations, improving performance, reliability, and accuracy across complex scheduling and pharmaceutical workflows.

•Integrated Jenkins CI/CD pipelines to automate builds and deployments, improving delivery speed, consistency, and release quality.

•Ensured code stability and regression coverage by writing NUnit test cases, participating in Agile/Scrum ceremonies, providing estimates, and conducting code reviews.

ACCENTURE Apr 2013 – May 2016

Senior Software Engineer, Hyderabad, India

Worked across several enterprise-level client projects delivering high-performance applications using WPF/MVVM, XAML, Xamarin, RESTful services, and SQL Server. Contributed to UI/UX development, backend engineering, mobile app development, and reporting solutions.

THOMSON REUTERS Mar 2011 – Apr 2013

Software Engineer, Hyderabad, India

Engineered rich, interactive WPF/MVVM and Silverlight applications for Thomson Reuters' FPS fiduciary tax system and OJM job-management platform, improving usability, performance, and data accuracy across high-volume financial workflows. Designed UI components using XAML, PRISM, and Telerik controls, built secure business logic layers, and optimized SQL Server stored procedures, triggers, and queries for faster processing.

EDUCATION

KIIT University, 2009

Master of Computer Applications (MCA)

Ranchi University, 2006

Bachelor of Computer Applications (BCA)

CERTIFICATIONS

•Microsoft Certified: Azure AI Engineer Associate

•Graph Database Fundamentals: Corporate Finance Institute (CFI), Aug 2026

•AI-Powered Scenario Analysis: Corporate Finance Institute (CFI), Aug 2026

•Data Prep for Machine Learning in Python: Corporate Finance Institute (CFI), Jul 2026

•AI Skills Fest 2026: Microsoft, Jun 2026

•Certificate of Completion: AI Fluency Framework & Foundations, May 2026

•Certificate of Completion: Claude 101, May 2026

Contact this candidate