Alejandro Diaz Limon portrait
Currently an Extern @Hydroficient

🟢 Open to work

Computer science junior blending finance interest with hands-on IoT security experience

Junior at the University of Florida, learning to apply code and security practices to finance-adjacent problems through practical externship work.

Work samples

Portfolio of hands-on work, including the Hydroficient IoT Cyber Defense externship where I tested attacks and implemented defenses like TLS and mTLS.

  • Hydroficient IoT Cyber Defense Externship
    Hydroficient IoT Cyber Defense Externship
    Hydroficient logo

    Hydroficient · Aug 2026 · ✅ Verified by Extern

    Hydroficient IoT Cyber Defense Externship

    Build, hack, and defend real IoT infrastructure, then hand your security playbook to an actual company. You’ll launch realistic cyberattacks, from spoofing and replay attacks to unauthorized shutoffs, and implement defenses like TLS and mTLS.

    Python ProgrammingData AnalysisThreat ModelingDashboard Development

About me

Junior at the University of Florida, learning to apply code and security practices to finance-adjacent problems through practical externship work.

I am a junior computer science student at the University of Florida focused on finance-related tech. I have some practical experience through hands-on externship work defending IoT systems and want to build confidence applying technical skills in real-world environments.

Externships

Hydroficient IoT Cyber Defense Externship

Hydroficient

Education

University of Florida

B.S Computer Science · Class of 2027

Skills

PythonC/C++Network securityTLS and mTLSIoT device testingCybersecurity fundamentals

✅ Verified by Extern

Hydroficient IoT Cyber Defense Externship

Build, hack, and defend real IoT infrastructure, then hand your security playbook to an actual company. You’ll launch realistic cyberattacks, from spoofing and replay attacks to unauthorized shutoffs, and implement defenses like TLS and mTLS.

Python ProgrammingData AnalysisThreat ModelingDashboard Development

Overview

The work targeted the Grand Marina hotel's IoT water system. The project inventoried assets, produced a STRIDE threat model with three prioritized findings, built tooling to parse mock sensor logs, mapped an MQTT topic hierarchy and exposure analysis, and implemented TLS/mTLS experiments measuring latency and delivery. The deliverables included a provisioning policy and replay-attack experiments

Hydroficient IoT Cyber Defense Externship

What I've accomplished

I produced a STRIDE-based threat model with three prioritized findings, Python parsing scripts for mock sensor logs, an MQTT topic map and exposure analysis, a tested TLS/mTLS pipeline with measured latency and delivery metrics, a device provisioning policy, and replay-attack experiments demonstrating that combined defenses stopped all attacks.

Project breakdown

View all work