Hi, and welcome to my personal site! I’m Daniela Fernandez Espinosa, a senior data engineer with over 8 years of experience, based in the Bay Area. I’m passionate about all things data, a self-proclaimed data geek, and an amateur runner in my spare time.
Latest from the Blog
Here’s to Second Chances: How I Became a College Athlete at 33
Progress is not linear, but every road leads somewhere. Three years ago, August 2023, I joined my brother for his weekly workouts at Town Athletics, a local running studio in Oakland focused on running fitness. I really enjoyed those sessions, not only because they were different from my regular routine (3 easy miles around Lake…
Back to the Basics: Refreshing Some System Design Concepts
Databases SQL vs NoSQL databases: When to use Relational Database: When to use Non-Relational Database: Scaling Vertical Scaling (Scale Up) Adding more resources to our existing servers. This is recommendable for application that have low or moderate traffic You will reach a limit. Also, if the server fails, then all your system will fails since…
Defining scope and constraints for Data Engineering pipelines
When we are designing data pipelines, it is important to start by asking the following questions: 1. Requirements and Goals 2. Sources and Destinations 3. Data Processing Expectations 4. Reliability and Fault Tolerance 5. Operational Considerations 6. Security and Governance These questions will help us clearly understand the requirements, enabling us to design a pipeline…
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Daniela Fernandez 