Daniel Castellanos is an Engineering Manager in Seattle with over a decade of hands-on software engineering experience and 15 years of industry involvement, known for leading data and platform teams to build scalable, user-friendly solutions. He has driven data engineering and cloud-native ML platforms at Qualtrics and Intel, translating complex big-data and Kubernetes-based requirements into reliable self-service tools and production services. Equally comfortable across front-end and back-end stacks, he has shipped UI improvements and robust test coverage for high-profile open-source projects like OpenStack Horizon, blending QA rigor with UX fixes. Daniel combines technical leadership with a maker’s mindset—regularly contributing code, tests, and architecture while coaching teams to improve delivery and quality. He brings a pragmatic focus on observability, security, and performance from building MLaaS and enterprise cloud platforms, and he enjoys turning ambiguous problems into simple, scalable solutions.
10 years of coding experience
7 years of employment as a software developer
Master of Science - MS Technology Leadership, Master of Science - MS Technology Leadership at Brown University
Bachelor of Arts - BA Sociology and Anthropology, Bachelor of Arts - BA Sociology and Anthropology at Silliman University
Global Leadership Innovation & Technology, Global Leadership Innovation & Technology at IE Business School
Bachelor of Science - BS Business Administration: Supply Chain and Logistics, Bachelor of Science - BS Business Administration: Supply Chain and Logistics at Portland State University - School of Business
Electronic Engineering Technology, Electronic Engineering Technology at Portland Community College
OpenStack Dashboard (Horizon). Mirror of code maintained at opendev.org.
Role in this project:
Backend & QA Engineer
Contributions:28 commits in 11 months
Contributions summary:Daniel's commits primarily focused on improving test coverage and quality assurance for the OpenStack Horizon dashboard, specifically targeting the "Flavors" functionality. They added new unit tests within `nova_tests.py` to cover areas previously untested, creating tests for flavor listing, getting, creation, and deletion. Additionally, the user addressed UI/UX issues, correcting a label in the image creation form and resolving container detail style issues. This demonstrates a blend of backend testing and frontend bug fixes.
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