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Daniel Cho

Hi, my name is

I'm a Security Engineer specializing in cloud security, infrastructure as code, and cybersecurity architecture. Currently working at Capital One, I'm passionate about building secure, scalable cloud solutions and protecting digital assets.

About Me

Daniel Cho

Hello! I'm Daniel, a Security Engineer based in Herndon, Virginia, specializing in cloud security architecture and cybersecurity. I'm passionate about technology and enjoy building secure, scalable cloud infrastructure solutions that protect organizations from evolving threats.

Currently working at Capital One, I focus on implementing security best practices, compliance frameworks, and zero-trust architectures. This fall, I'm starting my M.S. in Computer Science at Georgia Tech to go even deeper on the systems I secure.

I hold 14 industry certifications across security, cloud, and infrastructure — check out the Certifications section below to see the verified badges.

Where I've Worked

Capital One logo

Senior Security Engineer

@ Capital One

Aug 2025 - Present McLean, VA

  • Led design and implementation of a centralized AWS Private Certificate Authority (ACM + PCA) with least-privilege IAM guardrails, unblocking production mTLS migrations for 1,000+ clients
  • Architected a globally highly available Certificate Revocation List (CRL) service on AWS CloudFront with multi-region S3 origin failover and TLS 1.3
  • Drove supply-chain security hardening across the enterprise PKI platform, converting 100% of package and image pulls to credential-authenticated access
  • Engineered custom Python telemetry integrated with New Relic and PagerDuty, reducing Mean Time to Detection by over 90%
  • PKI
  • Cryptography
  • Data Protection
  • AWS

Some Things I've Built

Security engineering pays the bills — these are the things I ship on nights and weekends. Real products, built end to end, each one started because of a problem in my own life.

WEEKLY LADDERRANK #12
COMBO ×3

01 · Shipped to both app stores

Mobile arcade game · iOS & Android

The question that started it: could one person design, build, and ship a real game? BopRush is the answer — nine reflex, memory, and timing mini-games with weekly ranked ladders, real-time battle rooms for up to four players, and an XP, level, and badge progression system. Free to play, with a Pro subscription handled through in-app purchases.

  • Swift
  • iOS
  • Android
  • Real-time Multiplayer
  • StoreKit
App Store Google Playboprush.com
content-dashboard

Idea

Script

Posted

next reel
caption + hashtags copied

02 · Full-stack creator SaaS

Idea → script → film → post, in one place

Making short-form content means juggling ideas, scripts, filming, and posting across half a dozen apps. I built one home for it instead: fast idea capture, an AI script assistant, a built-in fullscreen teleprompter with mirror mode, a posting calendar, and a kanban pipeline that tracks every idea from first hook to published post. Then I productized it — Supabase auth with realtime cross-device sync, and Stripe subscriptions enforced all the way down to Postgres row-level security.

  • Next.js
  • TypeScript
  • Supabase
  • Stripe
  • AI Gateway
top50lifetips
#1
#2
#3
2.4k
2.1k
1.8k

no account needed · just vote

03 · Crowdsourced leaderboard

The internet's best advice, ranked

A leaderboard for practical life advice. Anyone can submit a tip, upvote, mark it 'tried,' and comment — no account required. The interesting problems live under the hood: ranking math that keeps fresh tips competitive, abuse reporting, sponsor slots, and Postgres row-level security keeping it all safe without a single login.

  • Next.js
  • TypeScript
  • Supabase
  • Tailwind CSS
boprush.com
App Store Google Play
Play free today

store links validated in CI ✓

04 · Product storefront

The game's public face

Every product needs a storefront. The BopRush site carries the launch: game mode overviews, support and privacy pages, and App Store / Google Play CTAs — with the store URLs covered by automated tests in CI, so a launch-day download link can never quietly 404.

  • Next.js 15
  • React 19
  • TypeScript
  • Tailwind CSS
danielcho.app

v1 · 2020

v2 · today

05 · 2020 → today

The site you are reading right now

v1 was a single-page React app on GitHub Pages, built in 2020 when I was first learning to code. This rebuild is everything I've learned since: Next.js and TypeScript, an interactive particle field, verified Credly badges, light and dark themes — and now this section. Keeping v1 public is the point: every project here started somewhere.

  • Next.js
  • TypeScript
  • Framer Motion
  • Tailwind CSS

Professional Work

Capital One logoCapital One

PKI & Cryptography Platform

Cryptographic solutions, digital certificates, and encryption key management on the Data Protection team — PKI at enterprise scale.

  • PKI
  • Cryptography
  • AWS
NIH logoNIH

Zero Trust Cloud Architecture

Zero Trust in the hybrid enterprise and AWS cloud migration for the STRIDES program, with Terraform infrastructure as code across AWS, Azure, and GCP.

  • AWS
  • Terraform
  • Zero Trust
NIH logoNIH

Security Compliance Automation

Automated compliance monitoring against NIST SP 800-53, FedRAMP, and RMF, with Splunk dashboards for real-time security visibility.

  • NIST
  • FedRAMP
  • Splunk
Fannie Mae logoFannie Mae

Security GRC & Risk Management

Technology risk assessments, threat modeling, and security design reviews for new systems and vendors — owning the risk register and control exceptions.

  • GRC
  • Threat Modeling
  • Risk

Free Training

Pass your first cloud cert in the next 14 days.

I’ve earned 15 certifications. Three of them actually made me money. The free training is which ones those were, and the one-hour-a-day system that gets you through the first one around a full-time job.

Name and email, and it’s yours:

*your data will not be shared*

What's Next?

Get In Touch

I'm always open to discussing new opportunities, security projects, or just connecting with fellow tech enthusiasts. Whether you have a question about cloud security or just want to say hi, I'll try my best to get back to you!

Say Hello