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Mario Medina Hernandez

@mariomedinahernandez

Message

I build Python automations and cloud observability tools that make data platforms more reliable.

Colombia

Message

What I'm looking for

I'm looking to build software and automation at the intersection of cloud, data, infrastructure, and observability, helping teams reduce operational work and run reliable, scalable systems.

At Simetrik, I investigate and resolve complex technical issues across a financial automation and reconciliation platform, working with data flows, APIs, cloud services, databases, and platform configurations.

I use Python, SQL, PostgreSQL, and Snowflake to analyze data inconsistencies, validate processing results, identify root causes, and build internal tools that reduce repetitive troubleshooting work.

I monitor production systems with Datadog and Amazon CloudWatch, investigate incidents, and develop alerts for critical processes. I collaborate closely with Engineering to reproduce errors and distinguish configuration, data, processing, and product issues.

I'm most comfortable where software, automation, infrastructure, and data meet. I focus on creating secure, traceable, reproducible solutions that help teams operate more efficiently and reliably.

Experience

Work history, roles, and key accomplishments

Technical support engineer

Simetrik

Dec 2023 - Sep 2026 (2 years 9 months)

As a Technical Support Engineer at Simetrik, I investigated and resolved complex production issues in a financial automation and reconciliation platform, combining technical support, data analysis, cloud operations, observability, and automation to troubleshoot data flows and reconciliation processes.

Python SQL PostgreSQL Snowflake AWS Datadog Incident Management Troubleshooting Automation Data Analysis Observability

Asociado

ADN Sigma

Nov 2022 - Mar 2023 (4 months)

I was responsible for providing technical and analytical support for decision-making related to the company's and clients' daily operations. This involved working with internal and client databases when necessary, as well as creating reports and visualizations to support data-driven decisions.

SQL Data Analysis Reporting Visualization Database Management

Education

Degrees, certifications, and relevant coursework

Henry

Data science, Data Science

2023 - 2023

Grade: NA

Activities and societies: Used data development and visualization tools to perform in-depth analysis of existing data sources, while gaining hands-on experience in data engineering through designing databases and building processes to extract, transform, and store data for further analysis and decision-making.

Used data development and visualization tools to perform in-depth analysis of existing data sources, while gaining hands-on experience in data engineering through designing databases and building processes to extract, transform, and store data for further analysis and decision-making.