// available for remote work

Jesús Antonio
Lumbreras Reyna

Database Administrator & SysAdmin with 3+ years managing enterprise infrastructure at scale. Founder of MiNegocio.tech. Exploring LLMOps.

dataentry9702@gmail.com WhatsApp LinkedIn MiNegocio.tech
Preferred contact: WhatsApp or Email — available for remote interviews in English and Spanish.
About

Systems Engineer with 3+ years in enterprise IT infrastructure — 2 years as a Linux/Windows SysAdmin and 1 year as DBA — managing environments of 1,000+ servers at a large-scale retail company (HEB México). I work daily with SQL Server, Oracle, and PostgreSQL in high-availability setups, migrations, and incident response.

Outside of HEB, I'm the founder of MiNegocio.tech, a SaaS platform for Mexican SMBs built with FastAPI, PostgreSQL, and AI integrations. I'm actively expanding into LLMOps — working hands-on with Ollama, Groq, Claude, Gemini, and open-source models.

Experience
HEB México Aug 2022 – Present
SysAdmin Linux/Windows → Database Administrator (DBA)
  • Managed infrastructure across 1,000+ Linux and Windows servers in a high-availability retail environment.
  • Migrated SQL Server instances from 2016 to 2022 across Dev, Cert, and Production environments.
  • Configured and maintained SQL Server Always On Availability Groups for HA and disaster recovery.
  • Advanced troubleshooting: query optimization, deadlock analysis, and critical incident resolution.
  • Administered Oracle and PostgreSQL databases in production environments.
MiNegocio.tech 2023 – Present
Founder & Full-Stack Developer
  • Built a multi-tenant SaaS platform for Mexican SMBs with WhatsApp Business API automation.
  • Stack: FastAPI, PostgreSQL, Node.js, integrated with AI models (Groq, Claude, Gemini).
  • Microservices architecture focused on scalability and low operational cost.
  • Live platform with real clients in production.
Technical Skills
Databases
SQL Server Oracle PostgreSQL Always On AG High Availability Migration
Infrastructure
Linux Windows Server CentOS Ubuntu Networking Office 365
Backend & Dev
Python FastAPI Node.js REST APIs SQL
AI & LLMOps
Ollama Groq Claude Gemini DeepSeek Qwen Stable Diffusion RAG
Cloud
Azure (AZ-900) OCI AWS básico
Languages
Spanish — Native English — B2
Certifications
AZ
Azure Fundamentals
Microsoft · AZ-900
OCI
OCI Foundations Associate
Oracle Cloud Infrastructure
Education
Computer Systems Engineering
TecNM — Instituto Tecnológico de Nuevo León