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Sai Hemanth Paturi - Sr .Net Fullsatck Developer

[email protected]

Location: Raleigh, North Carolina, USA

Relocation: Yes

Visa: Green Card Holder

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Sai Hemanth Paturi Sr .Net Full Stack Developer +1 (704) 997-9426 | [email protected] |Linkedin Professional Summary: Senior .NET Full Stack Developer with over 11+ years of experience delivering complex, secure, and scalable solutions across banking, healthcare, retail, and insurance domains. Proficient in both Agile and Waterfall SDLC models, collaborating in sprint planning, retrospectives, UAT cycles, and cross-functional team workflows using JIRA, TFS, and Azure Boards. Expertise in C# (5.0 11.0), .NET Core (2.2 7), ASP.NET Core Web API, and Web API 2, designing layered, modular, and reusable service-oriented backends for mission-critical systems. Designed enterprise platforms using modern architectural patterns like Microservices, N-Tier, MVC, and 3-Tier, ensuring scalability, modularity, and separation of concerns across services. Implemented RESTful APIs with advanced features like JWT-based OAuth2 authentication, middleware pipelines (Polly, Serilog), and Swagger/OpenAPI documentation for secure, discoverable services. Delivered responsive, cross-platform frontend applications using Angular (10 16), AngularJS, React, Blazor Server, TypeScript, HTML5, and Bootstrap (3 5), with WCAG compliance in financial and public sectors. Used Entity Framework Core, EF6, Dapper, and raw SQL for robust data access layers, optimizing performance, transactional integrity, and maintainability in PostgreSQL, Azure SQL, and SQL Server. Enabled secure data exchange via JSON and XML (NCPDP format), including custom serialization/deserialization and schema validation for compliance-heavy workflows. Built and integrated event-driven and asynchronous systems using Azure Service Bus, Apache Kafka, and MSMQ, ensuring fault tolerance and decoupled process orchestration. Developed and maintained GraphQL (Hot Chocolate) endpoints for flexible dashboard queries, improving efficiency in frontend data fetching for nested, permission-based records. Secured applications using Azure AD, Azure B2C, API Management Gateway, and managed identities, applying RBAC, throttling, IP filtering, and encrypted secrets via Azure Key Vault. Automated deployments via Azure DevOps CI/CD pipelines (YAML), integrating SonarQube, unit testing, and Helm-based delivery to AKS, Azure Web Apps, and IIS. Built unit and integration tests using xUnit, NUnit, MSTest, Moq, with in-memory DbContexts and service mocking to validate .NET backend logic under edge conditions. Developed UI and E2E test suites using Jasmine, Karma, Jest, Cypress, and Selenium, ensuring state consistency and accessibility across dynamic forms and financial dashboards. Deployed and monitored cloud-native systems using Azure (AKS, App Services, Cosmos DB, Application Insights) and AWS (EC2, RDS, S3), ensuring uptime and resilience in production environments. Proficient in Docker, Kubernetes, Helm, and Docker Compose, containerizing microservices and UI apps with proper probes, lifecycle hooks, and Helm chart-based orchestration. Designed scalable and normalized database schemas, stored procedures, UDFs, and triggers for critical modules in banking (KYC, AML), healthcare (HIPAA), and insurance domains. Maintained source control and collaborative workflows using Git, GitHub, Azure Repos, TFS, and GitFlow branching strategy with PR validation, reviews, and policy enforcement. Integrated legacy systems using SOAP (SOAP UI), XML protocols, and refactored them into modern RESTful or GraphQL services while maintaining backward compatibility. Adept at full-stack development using Visual Studio 2022/2019/2015, VS Code, integrated debugging, profiling, and cloud plugins to streamline development and diagnostics. Technical Skills: Backend & .NET Stack C# (5.0 11.0) , .NET 7 , .NET Core (2.2 6.0) , ASP.NET Core Web API , ASP.NET MVC 5 , Web API 2.2 , Blazor Server , Razor Pages , WCF (SOAP) , WinForms , SignalR. Frontend & UI Angular (10 18) , AngularJS 1.7 , React 16 , JavaScript (ES5 ES6) , TypeScript (4.6 5.0) , HTML5 , CSS3 , Bootstrap (3.3 5) , RxJS 7.4 , Redux , WCAG (2.1/Compliance). Database & ORM SQL Server (2012 2019) , Azure SQL , PostgreSQL , Azure Cosmos DB , MongoDB Amazon RDS , Entity Framework (6.2/Core 7) , Dapper , LINQ , T-SQL , PL/SQL Cloud & DevOps Azure (App Services, AKS, Blob Storage, Key Vault, API Management, Service Bus, DevOps, Application Insights) , AWS (EC2, S3, RDS, SDK) , Docker , Helm , Kubernetes , YAML , PowerShell 5.1 Messaging & Integration Apache Kafka (1.0) , Azure Service Bus , RabbitMQ , MSMQ , OAuth2 , JWT , Azure AD B2C , Swagger/OpenAPI , GraphQL (Hot Chocolate) , XML (NCPDP) , JSON (System.Text.Json) Testing & CI/CD xUnit , NUnit 3.11 , MSTest , Moq , Jasmine 3.3 , Karma , Cypress , Jest , Enzyme , Selenium , Postman , SOAP UI , SonarQube , Azure DevOps Pipelines , Git , GitHub , Azure Repos , TFS Professional Experience: Client: Citi Bank, NYC, NY. Aug 2023 - till date Role: .Net Full Stack Developer Responsibilities: Practiced Agile methodology with JIRA for sprint planning, story grooming, and daily stand ups while collaborating closely with BAs, QA teams, and product owners. Designed the platform using Microservices Architecture, separating presentation, application, domain, and data access layers for clear separation of concerns and maintainability. Built scalable and secure RESTful APIs in ASP.NET Core 7.0 and C# 11 to support loan onboarding, credit scoring, KYC, and approval workflows. Implemented centralized exception handling, middleware based logging, and policy based authorization to enforce role and access control across endpoints. Developed and documented RESTful endpoints for KYC checks, loan eligibility, and approval routing, ensuring seamless integration with internal risk and underwriting engines. Used Entity Framework Core 7 with repository and unit-of-work patterns for structured ORM and implemented Dapper selectively in reporting modules for performance optimization. Standardized data exchange using JSON with schema validation and serialization policies using System.Text.Json to maintain consistency across services. Introduced GraphQL using Hot Chocolate for Angular dashboards, allowing nested data retrieval for loan approvals, reducing overfetching and improving performance. Published and secured APIs via Azure API Management Gateway, managing throttling, versioning, and IP filtering for internal enterprise consumers. Integrated OAuth2 with Azure AD B2C, issuing JWT tokens and applying role-based access to loan officers, underwriters, and support staff. Migrated frontend from Angular 12 to Angular 16, gradually replacing legacy components with reusable Standalone Components for internal dashboards. Developed and maintained Blazor Server forms using C#-based state management and Razor templates while maintaining hybrid coexistence with existing Angular flows. Created responsive layouts using Bootstrap 5, HTML5, CSS3, TypeScript 5.0, and JavaScript with WCAG compliant accessibility for financial applications. Used Azure Cosmos DB for storing semi-structured KYC and audit data using partitioned containers, improving low-latency access and horizontal scalability across geo-distributed environments. Designed Cosmos DB stored procedures and custom indexing policies for write-heavy audit logs and document histories, ensuring optimal RU usage and consistent performance. Enabled event driven processing via Apache Kafka, handling asynchronous workflows between loan initiation, document validation, and credit decisioning services. Wrote unit tests for API logic and service layers using xUnit and Moq, ensuring business logic coverage, controller action validation, and service mocking. Developed component unit tests in Jasmine and Karma for Angular forms, services, and dashboard views, ensuring correctness of state transitions and UI bindings. Verified and tested legacy SOAP endpoints using SOAP UI, primarily during integration testing and to ensure compatibility during system replacement efforts. Defined CI/CD pipelines using Azure DevOps Pipelines to automate build, testing, and deployment for both .NET and Angular components into staging environments. Containerized Blazor and API services using Docker, orchestrated deployment through Azure DevOps CI/CD pipelines for consistent staging and QA environments. Deployed services using Azure App Services, Blob Storage, Key Vault, and managed secrets via identity-based access for externalized configuration handling. Configured distributed monitoring using Azure Application Insights, setting up custom traces, dependency tracking, and exception alerts for critical business workflows. Used Git with GitFlow strategy and Azure Repos for branch management, code reviews, pull requests, and policy enforcement on PR merges. Developed and debugged full-stack features using Visual Studio 2022 and Visual Studio Code, utilizing Live Unit Testing, performance profilers, and integrated Git support. Linked user stories in JIRA with AML compliance, KYC verification, and loan disbursement tracking for traceable delivery and UAT coverage. Environment: C# 11, .NET 7, ASP.NET Core Web API, Angular 16, Blazor Server, TypeScript 5.0, PostgreSQL, Dapper, Entity Framework Core 7, GraphQL (Hot Chocolate), JSON (System.Text.Json), OAuth2, Azure AD B2C, Azure API Management, Azure App Services, Azure Blob Storage, Azure Key Vault, Azure Cosmos DB, Docker, Azure DevOps, Azure Application Insights, Apache Kafka, xUnit, Moq, Jasmine, Karma, SOAP UI, Git, Visual Studio 2022, Visual Studio Code, JIRA. Client: UHG OPTUM, Minnetonka, MN May 2022 July 2023 Role: .Net Full Stack Developer Responsibilities: Followed Agile methodology using JIRA for sprint planning, backlog grooming, retrospectives, and cross-functional collaboration with QA and product teams. Architected the platform using Microservices architecture, ensuring modular deployment, fault isolation, and service independence across claims intake, audit, and validation services. Developed RESTful APIs using ASP.NET Core Web API 6.0 and C# 10.0 with layered controller routing, custom middleware, and dependency injection for reusable logic. Implemented cross-cutting concerns using custom middleware pipelines, including logging (Serilog), exception handling, and retry policies with Polly for fault tolerance. Integrated OAuth2 with Azure AD, issuing JWT tokens and applying role-based authorization policies to secure service-to-service and user interactions. Designed and documented Swagger/OpenAPI specifications for all APIs to enable automated SDK generation and seamless vendor integration. Used Entity Framework Core 6.0 for object-relational mapping, writing LINQ queries, managing migrations, and enforcing transactional consistency with Azure SQL Database. Standardized API payloads using JSON format and implemented data annotations with custom converters to maintain consistency and validation across layers. Routed external API traffic via Azure API Management Gateway, applying IP filtering, request throttling, and rate limiting for secure access control. Built responsive SPAs using Angular 13, organizing modules with lazy loading, feature-based folder structure, and Reactive Forms for dynamic claim intake forms. Designed cross-device compatible UIs with HTML5, CSS3, Bootstrap 5.1, and TypeScript 4.6, ensuring WCAG compliant accessibility across government dashboards. Used RxJS 7.4 and Angular HttpClient to create robust client-side services with error interception, retry strategies, and token injection middleware. Modeled normalized schemas and created stored procedures in Azure SQL for audit tracking, eligibility rules, and reconciliation workflows. Enabled asynchronous communication via Azure Service Bus, decoupling critical workflows like validation and auditing for durable message handling. Built backend unit tests using xUnit and Moq, covering service logic, API controllers, and data access layers with in-memory DbContext configurations. Validated API behavior under edge case conditions using Postman for test suite execution and environment-specific simulations. Created component and unit tests using Karma for Angular forms and services, maintaining modular test coverage with fixture based testing. Automated end to end scenarios using Cypress with TypeScript, validating claims intake, dynamic forms, and cross-service workflows from UI to DB. Defined Azure DevOps CI/CD pipelines using YAML templates, automating build, unit testing, SonarQube analysis, and staged deployments with manual approvals. Integrated SonarQube for static code analysis with thresholds for maintainability, test coverage, and vulnerability detection across .NET and Angular codebases. Containerized microservices using Docker, deployed to Azure Kubernetes Service (AKS) via Helm charts, and configured readiness/liveness probes. Provisioned and secured cloud resources including Azure App Services, Key Vault, and Blob Storage using managed identity access and RBAC. Monitored app health with Azure Application Insights, capturing distributed traces, custom metrics, and failures across API and frontend layers. Created Power BI dashboards for real-time Medicaid claim analytics using Azure SQL, Blob, and Application Insights, enabling role-based insights for compliance and operations. Used Git + GitHub for version control, enforcing GitFlow strategy, pull requests, branch protections, and CI validation integrations. Developed and debugged services using Visual Studio 2022, leveraging Live Unit Testing and Diagnostic Tools for in-depth debugging and runtime analysis. Managed sprint deliverables through JIRA, mapping user stories to Medicaid workflows and ensuring traceability across testing and documentation efforts. Environment: C# 10.0, .NET 6, ASP.NET Core Web API, Angular 13, TypeScript 4.6, RxJS 7.4, Azure SQL Database, Entity Framework Core 6.0, JSON, OAuth2, JWT, Azure API Management, Azure App Services, Azure Kubernetes Service (AKS), Azure Key Vault, Azure Blob Storage, Azure Service Bus, Swagger/OpenAPI, xUnit, Moq, Karma, Cypress, Postman, Serilog, SonarQube, YAML (Azure DevOps), Power BI, Application Insights, Docker, Helm, Git, GitHub, Visual Studio 2022, JIRA. Client: State of VA, Richmond, Virginia April 2019 May 2022 Role: .Net Application Developer Responsibilities: Followed the Waterfall SDLC model, executing structured phases from requirement analysis, technical design, development, and testing through deployment and production handoff. Designed and developed the system using a 3-Tier Architecture (Presentation Business Logic Data Access), enabling separation of concerns across AngularJS UI, Web API services, and SQL Server backend. Built secure RESTful APIs using ASP.NET Web API 2.2 and C# 7.3, exposing endpoints for real-time prescription validation, provider lookup, and refill eligibility checks. Developed and hosted WCF SOAP services with custom bindings to expose prescription validation and refill eligibility modules, enabling NCPDP XML interoperability with third-party pharmacy systems. Utilized Entity Framework 6.2 with LINQ queries and code-first migrations to interact with SQL Server 2017, supporting transactional updates and schema versioning. Developed dynamic, form-driven user interfaces using AngularJS 1.7 and JavaScript (ES5) for modules like dosage entry, patient search, and medication refill workflows. Styled responsive UIs using Bootstrap 3.4, CSS3, and media queries to support pharmacy desktops and tablets, ensuring consistent user experience. Used AngularJS $http service for token-authenticated API communication, applying interceptors for error handling and retry logic in prescription submission flows. Implemented form validations in AngularJS controllers and directives, enforcing required fields, pattern matching, and condition-based input controls. Modeled the backend with SQL Server 2017, designing relational schemas, foreign key constraints, and indexes for performance and data integrity. Wrote T-SQL stored procedures for logic related to dosage calculations, refill eligibility, and patient-provider linkage, and used UDFs and triggers to enforce audit requirements. Integrated MSMQ with WCF services for durable, queued communication of prescription transactions, ensuring fault-tolerant message delivery in pharmacy workflows. Automated deployment and configuration using PowerShell 5.1 scripts, setting up IIS 10.0 sites, MSMQ queues, and environment-specific variables across QA and production environments. Enhanced accessibility by following WCAG 2.1 guidelines, adding ARIA roles, keyboard navigation, and high-contrast support for visually impaired users. Wrote backend unit tests using NUnit 3.11 to validate data access, prescription logic, and API controller behavior for common and edge-case scenarios. Implemented frontend unit tests using Jasmine 3.3, validating AngularJS controllers, form state, and service interactions to maintain UI reliability. Hosted the application on-premise using IIS 10.0 servers and SQL Server 2017, with deployments managed via PowerShell and MSBuild in controlled pharmacy environments. Environment: ASP.NET Web API 2.2, C# 7.3, AngularJS 1.7, JavaScript (ES5), Bootstrap 3.4, HTML5, CSS3, SQL Server 2017, Entity Framework 6.2, MSMQ, WCF, XML (NCPDP), PowerShell 5.1, IIS 10.0, MSBuild, AWS EC2, Amazon RDS (SQL Server), Amazon S3, AWS SDK for .NET, NUnit 3.11, Jasmine 3.3, Visual Studio 2017, Visual Studio Code, Git, TFS. Client: American Airlines, Fort worth, TX December 2017 Mar 2019 Role: Software Developer. Responsibilities: Followed the Waterfall SDLC model, executing structured phases from requirement analysis, technical design, development, and testing through deployment and production handoff. Designed and developed the system using a 3-Tier Architecture (Presentation Business Logic Data Access), enabling separation of concerns across AngularJS UI, Web API services, and SQL Server backend. Built secure RESTful APIs using ASP.NET Web API 2.2 and C# 7.3, exposing endpoints for real-time prescription validation, provider lookup, and refill eligibility checks. Developed and hosted WCF SOAP services with custom bindings to expose prescription validation and refill eligibility modules, enabling NCPDP XML interoperability with third-party pharmacy systems. Utilized Entity Framework 6.2 with LINQ queries and code-first migrations to interact with SQL Server 2017, supporting transactional updates and schema versioning. Developed dynamic, form-driven user interfaces using AngularJS 1.7 and JavaScript (ES5) for modules like dosage entry, patient search, and medication refill workflows. Styled responsive UIs using Bootstrap 3.4, CSS3, and media queries to support pharmacy desktops and tablets, ensuring consistent user experience. Used AngularJS $http service for token-authenticated API communication, applying interceptors for error handling and retry logic in prescription submission flows. Implemented form validations in AngularJS controllers and directives, enforcing required fields, pattern matching, and condition-based input controls. Modeled the backend with SQL Server 2017, designing relational schemas, foreign key constraints, and indexes for performance and data integrity. Wrote T-SQL stored procedures for logic related to dosage calculations, refill eligibility, and patient-provider linkage, and used UDFs and triggers to enforce audit requirements. Integrated MSMQ with WCF services for durable, queued communication of prescription transactions, ensuring fault-tolerant message delivery in pharmacy workflows. Automated deployment and configuration using PowerShell 5.1 scripts, setting up IIS 10.0 sites, MSMQ queues, and environment-specific variables across QA and production environments. Enhanced accessibility by following WCAG 2.1 guidelines, adding ARIA roles, keyboard navigation, and high-contrast support for visually impaired users. Wrote backend unit tests using NUnit 3.11 to validate data access, prescription logic, and API controller behavior for common and edge-case scenarios. Implemented frontend unit tests using Jasmine 3.3, validating AngularJS controllers, form state, and service interactions to maintain UI reliability. Hosted the application on-premise using IIS 10.0 servers and SQL Server 2017, with deployments managed via PowerShell and MSBuild in controlled pharmacy environments. Environment: ASP.NET Web API 2.2, C# 7.3, AngularJS 1.7, JavaScript (ES5), Bootstrap 3.4, HTML5, CSS3, SQL Server 2017, Entity Framework 6.2, MSMQ, WCF, XML (NCPDP), PowerShell 5.1, IIS 10.0, MSBuild, AWS EC2, Amazon RDS (SQL Server), Amazon S3, AWS SDK for .NET, NUnit 3.11, Jasmine 3.3, Visual Studio 2017, Visual Studio Code, Git, TFS. Client: IBM, Hyderabad, India. June 2014 May 2017 Role: Software Developer. Responsibilities: Participated in Agile sprints and daily stand-ups, collaborating with analysts, QA, and business teams to deliver incremental features for insurance eligibility verification and policy matching modules. Developed backend RESTful APIs using ASP.NET Web API 2 and C# 5.0, handling insurance policy lookups, eligibility validations, and claim status services. Implemented layered service logic with reusable interfaces and business classes for determining member status, policy coverage, and verification results. Used Entity Framework 6.1 with code-first migrations and LINQ to interact with SQL Server 2012, managing insurance policy data and transaction logs. Built UI components using Bootstrap 3.3, HTML5, CSS3, and JavaScript (ES5) to create responsive and accessible interfaces for policy verification and claims workflows. Used ReactJS selectively for modular components like dynamic eligibility forms and real-time result rendering, integrated with React Router for in-app navigation. Performed asynchronous API consumption using AJAX, improving responsiveness during policy validation and document checks without full page reloads. Modeled relational schema in SQL Server 2012, creating normalized tables, indexes, and stored procedures to optimize verification response time and ensure data integrity. Hosted the application on AWS Cloud, using Amazon EC2 for IIS-based application hosting & Amazon RDS. Stored scanned ID proofs and documents securely in Amazon S3, applying bucket policies & object-level access controls. Integrated the AWS SDK for .NET within the backend to perform secure file uploads/downloads from S3 and health checks on RDS instances. Wrote backend unit tests using MSTest, covering service logic, controller actions, and data access layers to ensure high-quality and regression-free deliveries. Used Git for version control, managing branching, merges, and code reviews in a shared team environment. Developed and debugged full-stack features using Visual Studio 2015 and Visual Studio Code, leveraging browser dev tools and SQL Server Profiler for efficient diagnostics. Environment: ASP.NET Web API 2, C# 5.0, JavaScript (ES5), ReactJS (modular), Bootstrap 3.3, HTML5, CSS3, SQL Server 2012, Entity Framework 6.1, AJAX, AWS EC2, Amazon RDS (SQL Server), Amazon S3, AWS SDK for .NET, MSTest, Git, IIS, Visual Studio 2015, Visual Studio Code. Education: Bachelor of Technology in Computer science and Engineering. June 2010 May 2014 GITAM University, Hyderabad, India. Keywords: csharp continuous integration continuous deployment quality analyst user interface business intelligence sthree database active directory procedural language Idaho Minnesota New York Texas Virginia