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Hi there! I'm Omar Zelaya, a Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET 7/8/9, ASP.NET Core, C#, Angular, and cloud technologies. I enjoy designing scalable architectures, building robust APIs, and delivering end-to-end solutions that empower teams and users. I thrive on collaboration, problem solving, and continuous learning to stay ahead of evolving tech trends. I’m expanding my expertise into Python, AI, and ML, including Large Language Models, agentic AI, and intelligent workflow automation. I aim to combine solid engineering fundamentals with emerging AI capabilities to deliver scalable, business-focused applications that improve efficiency and user experience.…Hi there! I'm Omar Zelaya, a Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET 7/8/9, ASP.NET Core, C#, Angular, and cloud technologies. I enjoy designing scalable architectures, building robust APIs, and delivering end-to-end solutions that empower teams and users. I thrive on collaboration, problem solving, and continuous learning to stay ahead of evolving tech trends. I’m expanding my expertise into Python, AI, and ML, including Large Language Models, agentic AI, and intelligent workflow automation. I aim to combine solid engineering fundamentals with emerging AI capabilities to deliver scalable, business-focused applications that improve efficiency and user experience.

Omar Zelaya

Full Stack Developer, Web Developer, DevOps Developer, +1

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Hi there! I'm Omar Zelaya, a Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET 7/8/9, ASP.NET Core, C#, Angular, and cloud technologies. I enjoy designing scalable architectures, building robust APIs, and delivering end-to-end solutions that empower teams and users. I thrive on collaboration, problem solving, and continuous learning to stay ahead of evolving tech trends. I’m expanding my expertise into Python, AI, and ML, including Large Language Models, agentic AI, and intelligent workflow automation. I aim to combine solid engineering fundamentals with emerging AI capabilities to deliver scalable, business-focused applications that improve efficiency and user experience.…Hi there! I'm Omar Zelaya, a Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET 7/8/9, ASP.NET Core, C#, Angular, and cloud technologies. I enjoy designing scalable architectures, building robust APIs, and delivering end-to-end solutions that empower teams and users. I thrive on collaboration, problem solving, and continuous learning to stay ahead of evolving tech trends. I’m expanding my expertise into Python, AI, and ML, including Large Language Models, agentic AI, and intelligent workflow automation. I aim to combine solid engineering fundamentals with emerging AI capabilities to deliver scalable, business-focused applications that improve efficiency and user experience.

Available to hire

Hi there! I’m Omar Zelaya, a Senior Full-Stack .NET Engineer with 8+ years of experience delivering high-performance web and enterprise applications using .NET 7/8/9, ASP.NET Core, C#, Angular, and cloud technologies. I enjoy designing scalable architectures, building robust APIs, and delivering end-to-end solutions that empower teams and users. I thrive on collaboration, problem solving, and continuous learning to stay ahead of evolving tech trends.

I’m expanding my expertise into Python, AI, and ML, including Large Language Models, agentic AI, and intelligent workflow automation. I aim to combine solid engineering fundamentals with emerging AI capabilities to deliver scalable, business-focused applications that improve efficiency and user experience.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

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 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 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.