Available for opportunities

John Valdespino

// Nolan Cross

Cybersecurity analyst, AI engineer, and self-published sci-fi novelist. Currently interning at NEXA and pursuing an accelerated B.S. + M.S. at FIU — targeting federal tech, cloud security, and eventually New Zealand or Geneva.

Get in touch → LinkedIn ↗
8
Languages
15+
Certifications
5K+
Devices deployed
1
Novel published

Who I am

I'm a 21-year-old dual-degree IT student at FIU with a background in cybersecurity, AI pipelines, and Android device validation. I got here through construction sites and retail floors before pivoting fully into tech — which means I know how to work hard under pressure and deliver.


Outside the terminal, I write science fiction under the pen name Nolan Cross. My debut novel Lost Calling: Arc I — Two Moons explores identity, memory, and institutional power — themes that quietly inform how I think about security and systems too. I'm also a former AFROTC cadet and active martial artist, and I'm working toward a long-term goal of living and working internationally — with New Zealand and Geneva both on the map.

Languages spoken

English Native
Spanish Native
French Native
Portuguese Native
Haitian Creole Professional
Italian Professional
German Professional
Japanese / Mandarin Working

Interests

Competitive wrestling Martial arts Language acquisition AI research Drawing & painting STEM mentorship Science fiction International travel

Where I've worked

Technical Product Manager Intern
NEXA (formerly Social Mobile) — Hollywood, FL
Jun 2026 – Present

Android device validation, firmware-level debugging, and security testing across rugged handhelds, tablets, and IoT product lines at an Android Enterprise Gold Partner with 15M+ devices deployed globally. Applying cybersecurity knowledge to MDM, verified boot integrity, and network protocol testing. Tracking defect lifecycle in Jira across telephony, connectivity, hardware, and stability phases.

Android Validation Jira / QA MDM Security Firmware Debugging IoT
IT Specialist Intern
Archangel Education + Technology — North Miami Beach, FL
May – Aug 2025

Achieved 95–98% first-call resolution diagnosing hardware, software, and network issues. Managed user provisioning and access control for 200+ users in Windows Active Directory. Rebuilt 95% of company IT infrastructure including hardware upgrades, network reconfiguration, and security hardening. Coordinated nationwide Chromebook deployment to 5,000+ devices for underserved schools across the country.

Active Directory Network Security Infrastructure Device Deployment
AI-Powered Document Insights Extern
Extern (Outamation) — Remote
Feb – Mar 2025

Designed Python-based ML pipelines for automated document classification and structured data extraction using NLP and supervised learning, achieving 90–95% accuracy. Translated complex AI model outputs into actionable briefings and data visualizations for cross-functional stakeholders.

Python / NLP Semantic Embeddings RAG Data Extraction
Data Optimizer
Mokap Studio — Rome, Italy (Remote)
Feb 2025

Analyzed and optimized datasets to improve performance of digital projects. Developed algorithmic solutions and integrated data-driven insights with cross-functional product teams in Rome.

Data Analysis Algorithm Development

What I've built

🧠
Streamlined RAG Pipeline

Retrieval-Augmented Generation pipeline using all-mpnet-base-v2 semantic embeddings. Overlapping chunking strategy improved context accuracy and retrieval quality over rigid segmentation. Achieved measurable gains in AI response relevance.

Python NLP Cosine Similarity RAG
View on Colab ↗
🔐
VPN Security Architecture

Layered security framework for microlearning platforms. Proof-of-concept with certificate-based authentication, multi-factor access, and AES-256 encryption. Designed for real-world microlearning deployment environments.

VPN SSL/TLS AES-256 MFA
View deck ↗
📍
Tourist Luggage App

Cross-platform mobile app with real-time geolocation tracking, secure Stripe payments, and Firebase auth. Deployed on AWS infrastructure. Built with React Native front-end and Spring Boot backend.

React Native Spring Boot Firebase AWS PostgreSQL
🎾
Tennis Tournament System

Full-stack RESTful application with automated bracket generation, bye-round handling, and comprehensive JUnit 5 unit testing. Built with Java, Spring Boot, and Hibernate ORM against a PostgreSQL database.

Java Spring Boot JPA/Hibernate JUnit 5

The Novel

Nolan Cross — Debut Novel

Lost Calling: Arc I

Two Moons — June 2026

A science fiction series exploring identity, memory, and the human cost of institutional power. The first installment of a planned multi-arc series — available in hardcover, paperback, and eBook on Amazon KDP. Arc II is in development.

Find on Amazon ↗

Technical stack

Security

VPN Architecture SSL/TLS AES-256 SOC/SOAR Splunk (SPL) Vulnerability Assessment Incident Response Penetration Testing

Programming

Python Java JavaScript SQL PowerShell C++ HTML/CSS Bash

AI & Data

NLP RAG Semantic Embeddings Supervised Learning Predictive Modeling Data Visualization

Tools & Platforms

Git / GitHub AWS Firebase Jira Spring Boot React Native Django Linux ADB

Education

Accelerated B.S. & M.S. — Information Technology & Engineering Management
Florida International University
AWS Cloud Club · INIT Inc. · Former AFROTC Det. 155
2025 – May 2028
A.S. Cybersecurity Management
Miami Dade College
GPA 3.37 · Dean's List (4.00 & 3.60) · Rising Scholars Program · Honors College
2023 – Apr 2025

Let's connect

Email
johnvaldespino@gmail.com
in
LinkedIn
John Valdespino
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GitHub
JViz857
📍
Location
United States · Open to relocation