JUSTIN
RESTREPO
WELCOME
This is a live record of my engineering experiences and raw proof of fresh ideas.
Right now
Hardening enterprise security at scale.
Defending infrastructure and managing vulnerabilities inside a financial institution.
Focused on cloud, identity, and risk.
Implementing security controls that protect critical systems and users.
Scaling through complex engineering challenges.
Collaborating with senior engineers and mentors to deliver real-world production impact.
Building secure systems where trust isn’t optional.
The throughline
Each role changed the way I think about what it means to build responsibly.
Right now
3 months
Ally Financial · Charlotte, NC
Cloud & AI Security Engineer
Hardening enterprise infrastructure by building, configuring, and maintaining secure AWS policies to ensure strict posture management. I translate high-level compliance demands into actionable engineering by operationalizing custom detection policies using RQL in Prisma Cloud and XQL within Cortex.
Before that
8 months
Mindarch Health · New York
Software Development Engineer
Engineered a secure user onboarding and data collection system that safely connected patient endpoints with client environments. Focused heavily on data privacy by implementing strict role-based privileges and multi-tenant isolation to securely pipeline automated, AI-driven insights.
Where it began
3 months
National Grid · Melville, NY
IT Intern
Gained firsthand visibility into risk and compliance by shadowing systems engineers managing gas distribution networks across Long Island. Witnessing the real-time execution of automated industrial control systems proved how high-consequence safety metrics dictate technology architecture.
Project index · Newest to oldest
Portfolio · Design · Storytelling
Turning my résumé into a story
Architected and developed a responsive, custom web application designed to dynamically map out engineering experience through a narrative-driven dashboard layout. Focused heavily on minimalist UI/UX paradigms, optimized asset delivery, and interactive layout systems using Next.js and TypeScript.
My role
Designer and developer
Built with
Next.js / TypeScript / React / Tailwind CSS
Desktop · Architecture · Leadership
Leading a team from prototype to release
Spearheaded a five-person engineering team as Lead Developer and Scrum Master across multiple agile sprints to deliver a desktop data structures platform. Engineered the application’s core logic, integrated MongoDB Atlas backend pipelines, and implemented cryptographic hashing using BCrypt to secure user authentication.
My role
Lead developer and Scrum Master
Built with
Java / JavaFX / MongoDB Atlas / BCrypt / Maven / JUnit
AI · RAG · Wellbeing
Making AI support feel personal
Co-developed a full-stack, AI-driven contextual well-being application at a Columbia University hackathon using advanced Retrieval-Augmented Generation (RAG). Architected the secure data orchestration layer to safely ingest sensitive user journal inputs, manage token embeddings, and deliver real-time personalized insights via OpenAI and Gemini APIs.
My role
Full stack and AI development
Built with
Next.js / Gemini / OpenAI / LangChain / Supabase / Astra DB
Selected stories · 01—03
Three moments that shaped how I build.
Open a chapter to see the decisions, lessons, and tools behind the work.
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