Juliana Valencia

Overview

I've spent 9 years on data pipelines - first at América Móvil, now at Delta Systems. Shipped a rewrite that took build times from 32 minutes to under 3. Wrote the Snowflake service that now handles 62 million requests a day. Most at home with SQL and Airflow. Coffee nerd.

Best reached early in the week

Experience

1. Staff Data Engineer

   Apr 2026 - Present
   Delta Systems · 7 mo · Full-time · Mexico City, Mexico
   • Reduced stock-outs by 34% in the first season.
   • Built the forecasting models now used in 3 product decisions a quarter.
   • Wrote the metric definitions the leadership team reviews every week.
2. Senior Data Engineer

   Sep 2023 - Apr 2026
   McKinsey & Company · 2 yr 7 mo · Full-time · Mexico City, Mexico
   • Replaced 45 hand-built dashboards with one metrics layer people trust.
3. Senior Data Engineer

   Jan 2021 - Sep 2023
   Cemex · 2 yr 8 mo · Full-time · Mexico City, Mexico
   • Taught SQL to 200 non-analysts.
4. Data Engineer

   Sep 2019 - Nov 2020
   Vale · 1 yr 2 mo · Full-time · Mexico City, Mexico
   • Taught SQL to 180 non-analysts.
5. Data Engineer

   Dec 2017 - Sep 2019
   América Móvil · 1 yr 9 mo · Full-time · Mexico City, Mexico
   • Replaced 22 hand-built dashboards with one metrics layer people trust.
   • Cut forecast error from 32% to 8% across 1270 SKUs.

Projects

No references yet.

Education

1. Unicamp

   Bacharelado, Computer Science
   2012 - 2016