About

nicolas@teixeira-systems: ~


Work Experience

System Engineer

ADB Safegate | April 2023 – Present

  • Designed and deployed secure, scalable infrastructure for mission-critical airport systems.
  • Built and managed CI/CD pipelines with Azure DevOps, streamlining deployments.
  • Configured HA clusters for databases and identity management systems (IAM, SSO, SSL).
  • Led AWS migration for Delta Airlines, ensuring continuity of a critical on-premise system.
  • Directed a $30M United Airlines project, managing cross-functional teams end-to-end.
  • Deployed and maintained Windows, Linux, and Kubernetes environments (bare-metal, VM, cloud).
  • Developed a new wireless system, saving 1 hour/day in setup time and enabling remote troubleshooting.

Product Support Specialist

LPL Financial | San Diego, CA

August 2021 – April 2023

  • Supported 4 proprietary financial systems, ensuring high reliability for hundreds of advisors.
  • Partnered with escalation teams to resolve high-priority issues under tight SLAs.
  • Maintained service records for compliance and transparency.
  • Improved advisor experience by reducing recurring support issues through process refinements.

Technical Support Specialist II

Express Hospitality Inc. | San Diego, CA

July 2018 – July 2021

  • Managed provisioning, installation, and maintenance of hardware/software systems.
  • Configured desktops and streamlined onboarding for new hires.
  • Ensured uptime through proactive system monitoring and LAN/WAN maintenance.
  • Delivered on-site and remote troubleshooting, reducing downtime and support delays.

Education & Credentials

Education

M.S. in Software Engineering and DevOps Engineering

Western Governors University

Expected Graduation June 2026

(Accelerated program, on track for early completion)

B.S. in Computer Science

University of the People

Graduated August 2024

Certifications & Licenses

Introduction to Cybersecurity

Issued: February 2023

Cybersecurity for Business

Issued: March 2023

CS50 Introduction to Computer Science

Issued: December 2021

Technical Proficiency Matrix

DEVOPS & IaC

Terraform Ansible Azure DevOps CI/CD Pipelines Docker Kubernetes (k9s)

SCRIPTING & CLOUD

Python PowerShell Bash AWS Azure Proxmox VMware / Hyper-V

SYSTEMS & NETWORKING

Linux (RHEL/Debian) Windows Server VLANs / Firewalls Keycloak (SSO/IAM) Wireshark / SIEM JIRA / Support Tools

DevOps, Automation, & Infrastructure Case Studies

Explore real-world solutions that combine Enterprise Networking (VLANs/Security), Container Orchestration (Docker/Proxmox), and Cross-Platform Automation (PowerShell/Python). Each case study details the technical challenge, the specific tools used, and the delivered business solution.

*More detailed projects are added regularly.

PowerShell Scripting Code Snippet
PowerShell Automation Windows/Azure
Windows Automation Scripts

A repository of reusable PowerShell scripts for routine IT and system administration tasks, demonstrating efficient automation and system management.

Proxmox Server Automation Screenshot
Proxmox VE Virtualization Bash/Linux Infrastructure
Proxmox Automation Scripts

A collection of scripts designed to automate deployment and maintenance tasks in a Proxmox VE environment, showcasing infrastructure-as-code principles.

Media Server Application Dashboard
Docker Docker Compose Containerization Media Server
Containerized Media Downloader

A project using Docker Compose to deploy and manage a suite of media applications, focusing on robust container networking and configuration management.

Nextcloud All-in-One Dashboard Screenshot
Docker AIO PostgreSQL Reverse Proxy Containerization
Secure Nextcloud Deployment

A fully containerized solution using Nextcloud AIO and Docker Compose to manage an entire self-hosted cloud platform, showcasing secure, scalable data storage and service orchestration.

Network Topology Diagram
Networking Linux Security Routing/DNS
Advanced Home Networking Setup

Documentation and configuration files for a robust home network utilizing custom routing, VLAN segregation, and firewall policies to ensure security and performance.

Python Collaborative Project Code
Python Academic Collaboration
Collaborative Academic Python

A collection of early-stage Python scripts developed during my bachelor's program in collaboration with a peer, demonstrating foundational programming logic and version control principles.

Focus on: *Foundational programming and source control (Git).

Python Tkinter Chat Application UI
Python Networking Multi-Threading Tkinter GUI
Multi-Threaded Chat Server

A fully functional TCP client-server chat application built from scratch, demonstrating core programming concepts: concurrent processing with Python's threading, and socket-level network communication.

Portfolio Website Frontend Screenshot
HTML/CSS JavaScript Bootstrap 5 Front-End Dev
Interactive Portfolio Development

The source repository for this website, demonstrating front-end development, responsive design (UX/UI), and client-side scripting for synchronized typing effects.

Get In Touch

I'm always open to discussing new technical challenges, collaboration opportunities, or general conversations about DevOps and infrastructure. Feel free to send a message.

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