Security Engineering Portfolio

Julian Silva‑Erazo

Cybersecurity & Software Engineer

SOC Operations • DFIR • Detection Engineering • Secure Software Engineering • AI & Automation

I build defensive security tools, operational software, and AI-assisted systems with security engineered in from the beginning.

About

I'm Julian Silva‑Erazo, a Computer Science & Information Security student focused on security operations, DFIR, detection engineering, and secure software development.

I build security tools and applications that combine defensive security with software engineering — from forensic investigation platforms and detection systems to automation and operational software.

I also use AI-assisted development, prompt engineering, and workflow automation to accelerate engineering while keeping architecture, validation, and security decisions deliberate.

01 // Selected Systems

Selected Systems

Flagship platforms and tools engineered end-to-end, with security built into the architecture rather than added after the fact.

01 Active

NEXUS Command

Personal Operations & Intelligence Platform

A personal operations and intelligence platform for tracking projects, systems, and security posture in one place, built with security-by-design principles from the ground up.

Current build — Dashboard, missions/tasks, education, calendar, applications, and finance modules, with responsive mobile in progress.

React Vite Context API LocalStorage Security-by-Design
02 Active

RESTU-AI

Secure Restaurant Operations SaaS

A secure, multi-tenant SaaS platform for restaurant operations, with role-based access control and row-level security enforced at the data layer.

Current build — Dashboard, reservations architecture, customer CRM/conversations work, multilingual UI, and security-first tenant/RBAC design.

React TypeScript Supabase RBAC RLS SaaS Architecture
03 In Development

Silvanyx Atlas

AI-Assisted DFIR Timeline Reconstruction

An AI-assisted DFIR tool that reconstructs forensic artifacts into a structured investigation timeline, built to speed up incident analysis.

Current build — React frontend and FastAPI backend architecture for forensic CSV ingestion and investigation workflows.

React FastAPI DFIR Timeline Analysis Security Automation
04 In Development

CyberQuest

Interactive Cybersecurity Training Platform

An interactive cybersecurity training platform built around progression-based learning modules aligned to Security+ objectives.

Current build — Missions, progression systems, analyst stats, campaign interfaces, and Security+ learning workflows.

React Vite Interactive Training Progression Systems
02 // Security Research & Labs

Security Research & Labs

Smaller, focused research and lab work — exploratory and investigative, distinct from the flagship systems above.

Detection Engineering

AI-Powered Intrusion Detection

ML-based network intrusion detection work using models such as Random Forest, Logistic Regression, Isolation Forest, and hybrid approaches.

Python Machine Learning IDS Network Security
Security Automation

Threat Intelligence Automation

Automated threat-intelligence workflow using n8n and LLM-based relevance scoring.

n8n Groq LLM Workflows Threat Intelligence
Digital Forensics

Windows DFIR Investigations

Forensic investigation work using Windows artifacts such as event logs, registry data, prefetch, jump lists, and SQLite-backed application data.

DFIR Windows Registry Event Logs Forensics
Network Defense

DDoS Detection & Mitigation

Security lab focused on detecting and mitigating denial-of-service activity using Suricata, Apache, iptables, and controlled traffic generation.

Suricata Linux iptables Network Defense
Identity & Infrastructure

Active Directory / Identity Labs

Identity and infrastructure security work involving Active Directory, Group Policy, authentication systems, users/groups, and enterprise access-control concepts.

Active Directory Group Policy IAM Windows Server
03 // Capabilities & Stack

Capabilities & Stack

Tools, platforms, and technologies spanning security operations, digital forensics, security engineering, application development, and AI-assisted automation.

Security Operations

Splunk Suricata Wireshark Nmap

DFIR & Threat Hunting

Windows Event Logs Registry Prefetch Jump Lists SQLite

Security Engineering

Python PowerShell FastAPI REST APIs Automation

Application Engineering

React TypeScript Vite Git GitHub Supabase Cloudflare

AI & Automation

LLM Workflows Prompt Engineering AI-Assisted Development n8n Groq Structured Outputs Workflow Automation
04 // Let's Connect

Let's build something secure.

Open to cybersecurity, security engineering, SOC/DFIR opportunities, and technical collaboration.