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Walther Yeinch Castillo Patiño
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Walther Yeinch Castillo Patiño
Systems Engineer | Cloud Computing & Modern Architectures

About me

Hello! I'm Walther — Systems Engineer, based in Bogotá, Colombia.

I work at the intersection of software engineering and enterprise architecture: designing resilient distributed systems, and translating business needs into concrete technical solutions.

Interests

Projects

Selected work coming soon.

Currently

studying

Master in Information Technology Architecture (MATI), Universidad de los Andes — ArchiMate modeling, TOGAF, and metamodel design.

Education

🎓
Master in Information Technology Architecture (MATI) — in progress 🇨🇴, Present
Universidad de los Andes

Experience

Crea Sistemas S.A.S.
Jan 2025 – Jul 2025
  • Managed services on AWS infrastructure, providing operational support for EC2, S3, and IAM, ensuring the availability and continuity of technology environments.
  • Managed and resolved infrastructure, application, and platform incidents, delivering timely responses that minimized service disruption.
  • Deployed, configured, and maintained web applications on Apache and IIS servers, ensuring correct operation in test and production environments.
  • Executed functional validation and manual testing to verify application performance, stability, and quality before release.
  • Developed, adjusted, and optimized web and desktop applications using C#, .NET, and PHP, strengthening the functionality and performance of deployed solutions.
  • Managed queries, maintenance, and data validation in SQL Server databases, supporting data integrity, consistency, and availability.

Skills

Cloud & Resilience

Designing serverless, fault-tolerant architectures on AWS with progressive degradation and load-tested reliability.

Enterprise Architecture

ArchiMate modeling, TOGAF/ADM, and metamodel design applied to real business and technology alignment problems.

Backend Development

C#, .NET, and Node.js services with clean REST APIs built for maintainability and scale.

Databases & Data

Schema design, stored procedures, and query optimization across SQL Server, MySQL, and PostgreSQL.

DevOps & Infrastructure

Infrastructure automation and deployments across AWS, Azure, and Docker-based environments.

Full-Stack Web

End-to-end web development with JavaScript, TypeScript, HTML, and CSS.

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Get in touch!

Feel free to reach out :)