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Ariel Cornejo

Ariel Cornejo

Data engineer; Automation specialist
📍 Caracas, Venezuela · (0) · Member since October 2026
Availability
🏠 Works remotely / from home Yes No
🧰 Travels to client Yes No
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Presentation

Developer / Data Engineer / Support Engineer with 18+ years of experience supporting and enhancing mission-critical applications in telecom and data-driven environments. Specialized in ETL pipelines, database performance, and automation.
Proven track record of increasing performance and improving reliability in high-volume production systems.
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Offered services

1 service
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Background

Data Engineer
DBA-on-Call · 01/06/2023 – 30/09/2026
Data integration and automation engineer for production systems.
● Designed and implemented automated ELT pipelines for data integration across PostgreSQL, MySQL, SAP SuccessFactors (SOAP and REST interfaces), MongoDB, and Databricks.
● Designed and implemented the migration of a full PostgreSQL database to Databricks, including automatic schema conversion, automated ELT, and data integrity validation.
● Automated database monitoring, maintenance, and alerting using Bash and Python
Database Developer
KMG · 01/04/2022 – 31/10/2022
Designed and developed a RDBMS back-end for an Intranet application, including the database schema and PL/SQL code
underpinning the operation
Freelance developer
Upwork · 01/12/2021 – 29/02/2024
● Delivered automation, data cleanup, and API integration solutions using Python, PowerShell, SQL, Bash, and PHP
● Built reusable scripts and tools for data transformation and validation (regex-heavy workflows)
● Maintained consistent 5-star client ratings through continuous communication and improvement
Expert Support Lead
Digitel · 15/06/2016 – 30/09/2019
Support team lead for mission-critical billing systems.
Implemented solutions to monitor, supplement and mitigate limitations of critical systems.
Created ETL flows to cut down daily run times by 80% and bring the failure rate to practically zero.
Support Specialist / Consultant
Digitel · 01/07/2007 – 15/06/2016
Operational support for production billing systems at a mobile operator, including change control and contingency remediation.
Implemented solutions for monitoring, enhancing and working around issues of critical applications.
Electronics Engineer
Simón Bolívar University · 1990 – 2005
🇬🇧English 🇪🇸Spanish
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Working hours

Monday ▪ Today
From08h00To18h00
Tuesday
From08h00To18h00
Wednesday
From08h00To18h00
Thursday
From08h00To18h00
Friday
From08h00To18h00
Saturday
Closed
Sunday
Closed
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Reviews

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