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Walther Yeinch Castillo Patiño
Walther's photo
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.

Stack
backend
C#, .NET, Node.js, REST APIs
cloud
AWS (Lambda, API Gateway, SQS, DynamoDB, CloudWatch), Azure, Docker
data
SQL Server, MySQL, PostgreSQL
frontend
JavaScript, TypeScript, HTML, CSS

Interests

Projects

Selected work coming soon.

Currently

studying

Master in Information Technology Architecture (MATI), Universidad de los Andes

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.

Get in touch!

Feel free to reach out :)