Open to opportunities

Ronald Humberto Castillo Capino

@ronaldhumbertocastil

Message

I am a Data Scientist and Mathematical Engineer delivering ML-driven solutions and operational efficiencies.

Ecuador

Message

What I'm looking for

I seek a senior data science/engineering role to lead ML and ETL initiatives, drive automation and cost savings, and collaborate with cross-functional teams in a growth-oriented, data-driven company.

I am a results-driven Data Scientist and Mathematical Engineer with 9+ years of experience building data integrations, ETL pipelines, and machine learning models that produce measurable business impact.

I design and deploy predictive models and optimization solutions using Python, PySpark, TensorFlow, and advanced optimization solvers, achieving significant accuracy and cost reductions across projects.

I have led cloud migrations, CI/CD integrations, and end-to-end analytics implementations, improving operational efficiency and data traceability through automation and robust engineering practices.

I collaborate closely with cross-functional teams to convert complex data into actionable insights, build interactive BI dashboards, and deliver scalable solutions that support strategic decision-making.

Experience

Work history, roles, and key accomplishments

Senior Data Scientist

GMN Group

May 2023 - Nov 2024 (1 year 6 months)

Developed Python applications and PowerBI dashboards integrating SAP PM data, reducing process time by 20% and increasing operational efficiency. Implemented integrations between GitHub, SQL, and Jenkins, cutting manual tasks by 40% and improving data traceability by 50%.

Python Power BI SQL Jenkins GitHub Machine Learning Data Integration

Data Scientist LATAM

OLX Group

Feb 2021 - Mar 2023 (2 years 1 month)

Engineered ETL pipelines and predictive models with PySpark and SQL, increasing vehicle price prediction accuracy by 75%. Led a migration from GCP to AWS and developed an NLP model that reduced response time by 50% and increased conversions by 15%.

Pyspark SQL Python GCP AWS NLP ETL Machine Learning

Senior Data Scientist

Artificyan

Mar 2020 - Jan 2021 (10 months)

Spearheaded machine learning models (TensorFlow, Scikit-Learn) for agro-climatic analysis, improving long-range prediction accuracy by 60%. Coordinated geospatial analysis and created interactive Plotly dashboards, reducing strategic decision-making time by 20%.

TensorFlow scikit learn Python Geospatial Plotly Time Series Machine Learning

Optimization Consultant & Data Scientist

SmartBP

Feb 2019 - Feb 2020 (1 year)

Designed and implemented MILP optimization models with CPLEX-IBM, reducing operational costs by 30%. Automated order management using Python and DB2-SQL, cutting cycle time by 35% and increasing order throughput by 25%.

CPLEX Python IBM DB2 SQL Optimization Process Automation Operational Research

Data Scientist

Stupendo

Apr 2018 - Jan 2019 (9 months)

Developed segmentation models (SVM, K-means) and behavioral analyses using Python, PostgreSQL, and MongoDB, increasing targeted marketing efficiency by 15%. Built dashboards with Plotly and QlikView that raised conversion rates by 20% and improved retention by 10%.

Python PostgreSQL MongoDB SVM K Means Plotly Qlikview Segmentation

Senior Quantitative Research Analyst

Evalueserve

Sep 2011 - Jul 2017 (5 years 10 months)

Created quantitative models and automated reporting with MATLAB and VBA, reducing report generation time by 50% and increasing operational efficiency by 35%.

Matlab VBA Financial Analysis Time Series Data Analysis