Senior .NET Full-Stack Engineer with Cloud Expertise

JAMES ZAMORA

+1-321-***-**** *****.************@*****.*** Jacksonville, FL 32210

SUMMARY

With over 13 years of proven experience in enterprise software development, Successfully built multiple new projects from scratch and extended dozens of existing legacy solutions. Experienced in designing and delivering enterprise-scale applications in C#, .NET, ASP.NET, Blazor, Angular, React. Adept at implementing cloud solutions using AWS and Azure while fostering innovation within Agile development environments.Passionate about mentoring teams and delivering impactful solutions across healthcare, finance, and enterprise technology sectors. EXPERIENCE

Senior .Net Full Stack Engineer 03/2025 to Current Cloud DX, Brooklyn, NY, Remote

● Led migration of legacy systems to Azure Cloud and new tenant environments, reducing deployment time by 25% via Azure DevOps pipelines and GitHub Actions.

● Utilized .NET 6/7, Azure DevOps, and AWS to create a scalable data warehouse to serve consumer, mobile, and admin interfaces with healthcare data.

● Used .NET 5, Docker containers, Azure App Service, and Kubernetes to create a health service application API.

● Constructed the build and release pipelines using Azure DevOps to serve multi-environment deployments consistently and reliably.

● Utilized AWS services such as Fargate, ECS, and WorkSpaces to support hybrid cloud deployments and data integration.

● Integrated Kafka and Kafka Connect for event-driven communication between microservices, enhancing scalability and data consistency.

● Developed secure, high-performance Web APIs and RESTful services with .NET 6, enforcing OAuth2, JWT, Azure AD, and custom Azure B2C policies for authentication and authorization.

● Delivered responsive web and mobile applications using Angular (17/18), React (16), Blazor, Razor Views.

● Collaborated with cross-functional teams for troubleshooting and resolution of JavaScript (React) issues in production.

● Migrated .NET 3.0 legacy services to .NET Core Web API and modern architectural patterns. Senior .Net Full Stack Engineer 02/2021 to 02/2025 Comcast, Philadelphia, PA, Remote

● Led the modernization of a Comcast Identity Management System-CIMS and Account Management Portal-AMP using C#, .NET and React /Angular/TypeScript for frontend.

● Developed Comcast’s modern software suite in .NET 7/8/9 with Azure Serverless Architecture with a React frontend, resulting in a +29% improvement in system performance, as evidenced by a 23% reduction in response times and a 17% increase in system reliability.

● Migrated legacy applications from on-premises servers to Azure, significantly reducing infrastructure costs and enhancing system availability.

● Contributed to the design and scaling of internal platforms that evolved into externally-facing products, collaborating closely with product managers to align technical solutions with user needs and business goals.

● Reduced system downtime by +13% and decreased the number of support tickets by 22% after revamping Comcast’s 20-year-old software suite comprising two Classic ASP applications and .NET 2.0 WinForms applications

● Implemented rate-limiting and authentication layers using OAuth 2.0 and JWT tokens, protecting APIs from abuse while ensuring security.

● Migrated an on-premise SQL database to Azure and refactored a necessary C# ASP.NET app to run in Azure App Service used by four different teams.

● Refactored and optimized SQL Server database schema, leading to a 17% increase in system reliability and a 22% improvement in query execution time.

● Implemented a distributed caching layer using Redis and Azure Cache for Redis, reducing load on primary databases and improving data retrieval speeds.

● Contributed to multiple projects, creating branding and promotional applications for company contests. Utilized Oracle and SQL Server databases.

● Involved in the Design, Development, and Testing of Windows Forms, Web Forms, and Web Services using IIS, ASP.NET, XML Dataset, and .NET Framework.

● Optimized complex SQL queries, data modeling, database index tuning, the creation of views, procedures, functions, users, and roles, granting and revoking permissions, schema and tablespace, select system tables, PL/SQL script, cursors, and others.

● Established CI/CD pipelines using Azure DevOps, enabling automated builds, testing, and deployments, reducing deployment times by 18%.

● Enabled multi-region database replication using Azure SQL Database and Cosmos DB, ensuring high availability and disaster recovery readiness.

● Developed high-performance REST APIs and GraphQL services to power CIMS, improving response times by 23% and increasing data availability.

● Developed high-performance RESTful services using .NET Minimal APIs, optimizing request handling and reducing overhead in microservice-based architectures.

● Created CIMS technical roadmap that consists of uplifting security and modernizing authentication and authorization, updating legacy dependencies, increasing security posture, modernizing pipelines, and building agents, among other deliverables.

● Built API gateways and middleware using .NET Core, ensuring secure, scalable, and reusable API interactions across various services.

● Ensured application compliance with HIPAA and GDPR standards by implementing secure authentication, encrypted data transmission (SSL/TLS), and proper data handling protocols in cloud-hosted systems.

● Implemented SSL/TLS encryption between the Angular 15/16/17 frontend and ASP.NET Core 6 backend to secure sensitive data transmissions.

● Redesigned and optimized UI components in React and Angular, improving usability, performance, and accessibility.

● Developed a unified UI component library using Angular to ensure consistent branding and UX across Comcast applications.

● Utilized Angular, React with advanced front-end libraries and frameworks like HTML5, CSS3, SCSS, and Bootstrap 5, delivering modern, responsive, and accessible user interfaces for CIMS and AMP.

● Refactored legacy jQuery-based UI components, modernizing them with TypeScript and Webpack for improved performance.

● Used GraphQL for efficient data handling and manipulation, improving application performance.

● Developed and maintained WCF services for secure data exchange, implementing SOAP-based communication for legacy system integrations within the CIMS platform, ensuring seamless interoperability and data integrity across distributed applications.

● Utilized Blazor Server for faster load times in administrative interfaces and Blazor WebAssembly for client-side performance in patient-facing applications.

● Replaced legacy ASP.NET MVC modules with Blazor components, streamlining performance and reducing frontend maintenance by 40%.

● Extensively used LINQ and ORM tools like Entity Framework to exchange data between web applications and database objects.

● Developed and maintained ETL processes using T-SQL and SSIS, enabling efficient data extraction, transformation, and loading from various sources.

● Developed dynamic, user-friendly reports with SQL Server Reporting Services (SSRS) to provide comprehensive data insights for business stakeholders, reducing report generation time by 30%.

● Implemented PowerShell scripts to deploy migrated services into Azure Service Fabric and manage the lifecycle, including local development.

● Implemented DevOps methodologies and tools, including Jenkins and GitLab, to automate and optimize processes, including the implementation of CI/CD pipelines.

● Implemented Test Driven Development (TDD) using the NUnit Framework for unit testing and ability to load, explore and execute tests.

● Implemented Infrastructure-as-Code (IaC) with Terraform and ARM templates, automating cloud infrastructure provisioning across environments.

● Implemented serverless computing solutions using Azure Functions and AWS Lambda, reducing processing time and eliminating unnecessary background processes.

● Monitored application health and performance using Azure Monitor, Application Insights, and AWS CloudWatch, enabling proactive issue detection and resolution.

● Mentored and coached junior developers, providing guidance on .NET best practices, microservices architecture, and cloud technologies.

Senior .NET Engineer 03/2014 to 01/2021

Medtronic, Minneapolis, MN, Remote

● Developed web applications using C# and ASP.NET, following MVC architectural pattern and utilized

.NET Core framework to build cross-platform applications.

● Reduced the client-facing webpage load time from 30+ seconds to only milliseconds by minimizing database round trips using Entity Framework for efficient stored procedure result-to-entity translation.

● Implemented new features to apps and wrote complex SQL Server queries, stored procedures, functions, and more.

● Enhanced performance by integrating Elasticsearch API, segregating transactions, and auditing data. Replaced multiple database read calls with a single Elasticsearch API call, significantly improving response times and reducing database load.

● Wrote, debugged, and maintained T-SQL server tables and stored procedures required to meet business needs. Also integrated Dapper to the .Net Core data layer project to execute these stored procedures easily.

● Developed the database model for the file import process using SQL Server. T-SQL was used for developing the script for the table structure and stored procedures.

● Created REST APIs and utilized Windows Communication Foundation (WCF) services for seamless data exchange, improving system interoperability by 23%.

● Developed third-party integrations with healthcare software providers, ensuring interoperability with EHR

(Electronic Health Records) and compliance with HL7/FHIR standards.

● Implemented a secure patient portal using React / TypeScript, enhancing user experience and ensuring HIPAA compliance through robust type-checking and structured component architecture.

● Created a Blazor app to explore all the data fetched by Microsoft Orleans using ASP.NET Identity Server.

● Developed an Entity Framework Core infrastructure as a data persistence layer over SQL Server.

● Implemented a new version of checkout supporting recurring subscriptions for Medtronic using React and microservices built in .Node.js, TypeScript, and GraphQL.

● Created reports with SQL Server Reporting Services (SSRS) and Datasets, aggregating data from various sources

● Covered Angular-driven web applications with end-to-end tests using Protractor, increasing UI feature test coverage by 30%.

● Developed scalable and dockerized back-end RESTful API services using .NET Core, PostgreSQL, Redis and RabbitMQ.

● Used ADO.NET and data objects such as Data Adapter, Data Reader, Dataset, Data table, and XML Text Reader Writer for consistent access to SQL data sources.

● Actively used cursors, functions and calling procedures from one package to another package and created dynamic SQL statements in Oracle using PL/SQL and ADO.NET.

● Set up project repositories and configured CI/CD pipelines with testing, quality check, and deployment scripts for development, staging, and production environments.

● Developed backend services in C# with ASP.NET, handling large-scale transaction processing and integrating with messaging systems like RabbitMQ and Kafka for real-time data flow.

● Wrote unit tests and integration tests using xUnit and Selenium, ensuring the robustness of .NET applications and high-quality code delivery.

● Implemented optimized LINQ queries in Entity Framework to efficiently retrieve and manipulate data from the database, enhancing application performance by 33% and reducing response times by 18%.

● Implemented microservices architecture using Docker and Kubernetes, improving deployment flexibility, and enabling efficient scaling of services.

● Contributed significantly to the complete migration of the product from ASP.NET to Angular/.NET Core/ T-SQL stack.

● Worked in a wide-area network to maintain all the device-related data in PostgreSQL, Amazon RDS, and Oracle databases.

● Implemented Azure services such as Azure Functions, Azure Service Bus, and Azure Storage for various application functionalities.

Software Developer 08/2012 to 02/2014

Concertium, San Diego, CA

● Leveraged UI expertise in AngularJS to troubleshoot existing UI issues and develop new user-friendly forms.

● Applied DRY & SOLID principles of software development making good use of OOP features such as abstraction, encapsulation, inheritance, and polymorphism Created software applications in a test-driven development (TDD) environment.

● Rewrote tons of stuff from jQuery and legacy CoffeeScript code to vanilla JavaScript.

● Implemented a real-time messaging service using SQL and ASP.NET, facilitating seamless communication between users during live sessions.

● Optimized the data access layer, reducing its size, resulting in a 13% improvement in data retrieval performance and reduction in database load times

● Implemented Single Sign-On (SSO) Solutions to provide common gateway for login

● Wrote Node.js routines to discover and convert millions of hyperlinks in MongoDB.

● Migrated code from the legacy VB6 system to new modules built in VB.NET. EDUCATION

Bachelor of Science: Computer Science 05/2012

University of Miami United States

SKILLS

● Languages: C#, Python, Java, JavaScript,

TypeScript, Node.js, SQL

● .NET Technologies: .NET 2/4/6/7/8, .NET Core,

ASP.NET, ASP.NET Core, ADO.NET, WCF, WPF,

Web

Forms, Win Forms, Entity Framework, Blazor,

BizTalk

● Web Development: Angular 9/11/14/16, React,

GraphQL, jQuery

● Tools: Git, TFS, GitHub, NPM, Webpack, Visual

Studio, SendGrid, Windows Azure SDK, GitLab

CI/CD, Subversion (SVN), Jira, Confluence, Slack

● Libraries/APIs: REST APIs, Web API, jQuery,

Sockets, Salesforce API, Node.js, Vue, React,

CyberSource, Google Calendar API, Vuex, Windows

Forms (WinForms)

● Storage: Oracle SQL, JSON, PostgreSQL, Redis,

Databases, MySQL, Amazon S3 (AWS S3),

Elasticsearch, Oracle PL/SQL, Microsoft SQL

Server, PL/SQL, Azure Active Directory, NoSQL,

Azure Cosmos DB, MongoDB

● Platforms: Azure, AWS, Docker, Kubernetes,

Oracle, Azure DevOps, AWS Lamda

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