Oscar Araya Diaz (oscar.araya.oad)

Hello! I’m Oscar, a Data & Business Control Analyst with 4+ years of experience in cost control, process optimization, and database management.

My Skills: - SQL & PostgreSQL: Database design, query optimization, and complex CTEs/Window Functions. - Python: ETL/ELT pipelines (upserts), automation, and EDA (Pandas, NumPy). - BI & Tools: Interactive dashboards in Power BI and Tableau. - Languages: Spanish (Native) and English (C2 Certified).

Why I Volunteer: I want to apply my technical and financial background to help non-profits clean, structure, and visualize their data so they can make better decisions. I enjoy working with large datasets and transforming raw records into clear, actionable dashboards.

What I Want to Accomplish: I aim to deliver clean, well-documented, and production-ready data solutions while collaborating with great teams and building a high-impact portfolio.

Let's build something impactful together!

Personal information
Full name: Oscar Araya Diaz
User name: oscar.araya.oad
Organization memberships
Not a member of any organization.
Awards
No awards received yet.
Volunteer background
Education: Bachelor's on Professional Technique in Data Analysis (AIEP)
LinkedIn profile
Github profile
Portfolio
Volunteer availability
Start date: July 16, 2026
End date: None
Hours available per week: 12
Volunteering interests
No stated preferences.
Skills
Skill
Beginner
Intermediate
Expert
Python
Computer Science (Algorithms)
SQL
Data in Relational Databases
Text Data (NLP)
Data > 1TB
Data in Text Files
Data Visualization
Social Science (Economics, Sociology, etc.)
Experimental Methods (RCTs, A/B testing, etc.)
Experience working on real-world problems using data
Data Analysis
Time Series Models
Random Forests
Decision Trees
SVMs
Neural Networks / Deep Learning
Matching (e.g., Propensity Score Matching )

Volunteer projects

No volunteer work yet.