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Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET (6/7/8), ASP.NET Core, C#, Angular (JS/13+), and cloud technologies across Azure and AWS. Skilled in software architecture, REST API development, database design, microservices, and cloud-native solutions. Expands expertise in Python and AI, including Large Language Models (LLMs), agentic AI, machine learning, and intelligent workflow automation. Builds scalable, business-driven applications that improve efficiency and user experience using strong engineering fundamentals combined with emerging AI capabilities.…Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET (6/7/8), ASP.NET Core, C#, Angular (JS/13+), and cloud technologies across Azure and AWS. Skilled in software architecture, REST API development, database design, microservices, and cloud-native solutions. Expands expertise in Python and AI, including Large Language Models (LLMs), agentic AI, machine learning, and intelligent workflow automation. Builds scalable, business-driven applications that improve efficiency and user experience using strong engineering fundamentals combined with emerging AI capabilities.

Omar Zelaya

Full Stack Developer, Web Developer, DevOps Developer, +3

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Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET (6/7/8), ASP.NET Core, C#, Angular (JS/13+), and cloud technologies across Azure and AWS. Skilled in software architecture, REST API development, database design, microservices, and cloud-native solutions. Expands expertise in Python and AI, including Large Language Models (LLMs), agentic AI, machine learning, and intelligent workflow automation. Builds scalable, business-driven applications that improve efficiency and user experience using strong engineering fundamentals combined with emerging AI capabilities.…Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET (6/7/8), ASP.NET Core, C#, Angular (JS/13+), and cloud technologies across Azure and AWS. Skilled in software architecture, REST API development, database design, microservices, and cloud-native solutions. Expands expertise in Python and AI, including Large Language Models (LLMs), agentic AI, machine learning, and intelligent workflow automation. Builds scalable, business-driven applications that improve efficiency and user experience using strong engineering fundamentals combined with emerging AI capabilities.

Available to hire

Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET (6/7/8), ASP.NET Core, C#, Angular (JS/13+), and cloud technologies across Azure and AWS. Skilled in software architecture, REST API development, database design, microservices, and cloud-native solutions.

Expands expertise in Python and AI, including Large Language Models (LLMs), agentic AI, machine learning, and intelligent workflow automation. Builds scalable, business-driven applications that improve efficiency and user experience using strong engineering fundamentals combined with emerging AI capabilities.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Full-Stack .NET Engineer at Perficient

July 1, 2024 - Present

Architected a hybrid reporting solution leveraging Kafka-based event streaming for near real-time analytics and data lake integration for large-scale historical data processing. Defined service boundaries, API contracts, and data models for reporting and cashier management modules to improve maintainability and enable independent feature evolution. Integrated data lake querying to generate large-scale historical reports over extended time periods while maintaining performance. Expanded RESTful APIs and Angular-based dashboards for sales trends, transaction metrics, and cashier productivity. Implemented a robust configuration management system for POS-based projects to streamline backend service updates and configurations; automated artifact download from NuGet, content extraction, and application of new configurations. Built CI/CD pipelines using JFrog Artifactory to automate artifact promotion across test, stage, and production environments. Specified and maintained reporting systems

Senior .NET Full-Stack Engineer

July 1, 2024 - Present

Developed and maintained a POS reporting platform including hourly/weekly sales reports, transaction analytics, and cashier performance dashboards to support data-driven operational decisions. Architected a hybrid reporting solution leveraging Kafka-based event streaming for near real-time analytics and Data Lake integration for large-scale historical processing with performance and scalability in mind. Defined service boundaries, API contracts, and data models for reporting and cashier management modules to improve maintainability and enable independent feature evolution. Integrated data lake querying to generate large-scale historical reports and analytics across extended time periods while preserving reporting performance. Expanded REST APIs and Angular-based dashboards for visualizing sales trends, transaction metrics, and cashier productivity. Implemented robust configuration management for a POS-based project to streamline backend service updates and configurations. Automated the

Senior Software Engineer at Perficient

July 1, 2024 - Present

Developed and maintained a POS reporting platform including hourly sales reports, weekly sales reports, transaction analytics, and cashier performance dashboards, enabling data-driven operational decisions. Architected a hybrid reporting solution leveraging Kafka-based event streaming for near real-time analytics and Data Lake integration for large-scale historical data processing, ensuring optimal performance and scalability. Defined service boundaries, API contracts, and data models for reporting and cashier management modules, improving maintainability and enabling independent feature evolution. Expanded RESTful APIs and Angular-based dashboards for visualizing sales trends, transaction metrics, and cashier productivity. Implemented a robust configuration management system for a POS-based project to stream backend service updates and configurations. Automated the process of downloading artifacts from NuGet, extracting content, and applying new configurations to run in services. Buil

Senior Full-Stack .NET Engineer at Perficient

August 1, 2020 - June 30, 2024

Designed scalable, high-performance backend services using .NET (6/7/8) with clear service boundaries, API contracts, and architectural patterns for Clinical Decision Support (CDS) workflows, aiming for high availability and low latency. Led modernization efforts for healthcare applications by transforming legacy .NET Framework 4.7/4.8 systems into cloud-ready .NET microservices to improve scalability, maintainability, and deployment agility. Implemented secure RESTful APIs with ASP.NET Core, establishing API standards and integration/authentication patterns for Angular and React-based clinical applications. Designed data access strategies using Entity Framework Core and SQL Server, optimizing query performance and data models for large-scale oncology and patient datasets. Clarified integration approaches for healthcare interoperability (FHIR-compliant solutions) and third-party healthcare system integrations. Applied event-driven and asynchronous processing architectures using Azure F

Senior Full-Stack .NET Engineer at insteD

August 1, 2020 - June 30, 2024

Designed and defined scalable, high-performance backend services using .NET (6/7/8), establishing service boundaries and architectural patterns to support Clinical Decision Support (CDS) workflows with high availability and low latency. Led modernization strategy for healthcare applications, transforming legacy .NET Framework 4.7/4.8 systems into cloud-ready microservices architectures to improve scalability, maintainability, and deployment agility.

Senior Software Engineer

August 1, 2020 - June 1, 2024

Led the modernization strategy for health care applications, transforming legacy .NET Framework 4.x to cloud-ready microservices architecture. Architected and implemented secure RESTful APIs using ASP.NET Core, establishing API standards, authentication frameworks, and integration patterns for Angular and React-based clinical applications. Applied event-driven and asynchronous processing architectures using Azure Functions, background services, and messaging patterns to support large-scale health care data ingestion and processing. Established CI/CD standards and DevOps best practices using Azure DevOps, improving release reliability, deployment automation, and operational efficiency. Ensured HIPAA-compliant application architecture. Enforced comprehensive test strategies using xUnit, NUnit, Selenium, promoting code quality and functional accuracy. Implemented robust authentication and authorization mechanisms, encryption, and audit logging to meet regulatory requirements. Drove archit

Software Engineer (Full Stack Engineer) at Best Buy

April 1, 2017 - August 1, 2020

Worked as a Full Stack Engineer building features for the EMR system, including performance optimizations, deployments, and customer support. Maintained Web APIs and implemented integrations with multiple third-party APIs. Modeled task scheduling within workflows using RabbitMQ. Tested functionality by writing xUnit tests. Conducted code reviews to ensure high-quality deliverables. Incorporated third-party services and APIs to extend application capabilities and improve user experience. Integrated inventory management and Pharmacy Point of Sale modules into an existing EMR application.

Software Engineer at Best Buy

April 1, 2017 - August 1, 2020

As a Full Stack Engineer, built numerous features of the EMS, performed performance optimizations, managed deployments, and provided customer-focused support. Modelled scheduling workflows and integrated third-party APIs to streamline operations. Participated in code reviews, unit testing, and collaboration with cross-functional teams to deliver high-quality software on tight timelines.