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David CastañedaDC
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David Castañeda

@davidcastaeda

Results-driven .NET Backend Developer specializing in scalable APIs, SQL optimization, and Azure serverless systems.

Colombia
Message

What I'm looking for

I’m looking to build secure, high-performance backend APIs in a modern .NET/Azure environment—delivering scalable integrations, CI/CD automation, and SQL optimization. I value Agile collaboration, strong security/compliance, and measurable deployment and performance improvements.

I’m a results-driven .NET Backend Developer with 10+ years of experience building scalable APIs, enterprise-grade applications, and cloud-native solutions. I bring deep expertise in C#, ASP.NET Core, and SQL Server optimization, plus 3+ years of hands-on Microsoft Azure specialization across serverless architectures and system integrations.

I’ve led improvements that directly moved delivery outcomes—reducing deployment times by 30% through CI/CD pipelines in Azure DevOps, and optimizing stored procedures across 50+ key procedures. In recent work with financial sector clients, I deliver secure, high-performance backend solutions in fully English-speaking environments while executing lift-and-shift migrations with zero downtime for critical services.

My approach is grounded in Agile/Scrum collaboration, security/compliance awareness, and continuous modernization—updating packages, modernizing caching solutions, and driving essential application updates. I’m actively preparing for AZ-204, focused on building reliable serverless APIs with strong CI/CD automation and secure integrations.

Experience

Work history, roles, and key accomplishments

TF
Current

Back End Developer

Tech First

Jul 2025 - Present (9 months)

Delivered lift-and-shift migrations from legacy servers to modern infrastructure for a major financial institution, ensuring zero downtime for critical services. Reduced deployment time and technical debt by modernizing caching, updating packages, and maintaining CI/CD pipelines while collaborating with architects, QA, and BSA teams in an Agile/Scrum workflow.

Education

Degrees, certifications, and relevant coursework

FP

Fundación Universitaria Panamericana

Professional Technician, Software Development

2011 - 2013

Completed a Professional Technician program in Software Development at Fundación Universitaria Panamericana from 2011 to 2013.

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