Architecture, Systems & Execution

Technical Case Studies

Real-world systems engineered to solve security, scalability, cryptography, and AI automation challenges. No templates or abstract theory: decisions, trade-offs, and production architectures.

01

Security & AI Agents

GreenGate: On-Device Human Approval for AI Agents

Global winner of the DEV Weekend Challenge: Best Use of Auth0 for Agents. Solves hallucination and prompt injection risks in autonomous agents by decoupling conversational interaction from high-security authorization via OpenID CIBA and Gemini.

Next.jsTypeScriptGoogle Gemini APIAuth0 CIBAPostgreSQLZodTailwind CSS
Read technical case studyTechnical article on Dev.to

Key metrics

Award: Global DEV Challenge Winner
Token Issuance: < 2s latency
Injection Resilience: 100% in-band attacks neutralized
02

Cryptography & Digital Signatures

Post-Quantum Signing: Software HSM & Crypto-Agility with ML-DSA and SLH-DSA

A Software HSM prototype and crypto-agility framework built in TypeScript and WebAssembly to transition existing digital signature infrastructures and PKIs toward post-quantum algorithms without breaking consuming applications.

TypeScriptWebAssemblyML-DSASLH-DSAASN.1 / X.509Node.jsVitest
Read technical case studyGitHub repository

Key metrics

Standards: NIST FIPS 204 & FIPS 205
ML-DSA Throughput: > 1,400 signs/sec on standard CPU
Verification Latency: < 0.4ms per document
03

Web Architecture & Operations

juanchi.dev: Bilingual Content Platform with Deterministic Quality and Self-Hosted Analytics

High-availability production platform powering juanchi.dev. Built on Next.js 16 App Router, React 19, and Prisma 7. Incorporates daily automated content pipelines with anti-hallucination guardrails, bilingual SEO cannibalization prevention, and custom cohort analytics.

Next.js 16React 19TypeScriptPrisma 7PostgreSQL 17CoolifyDockerTailwind CSS v4
Read technical case studyGitHub repository

Key metrics

Core Web Vitals: LCP < 1.2s · CLS 0.00
Automated Tests: +920 passing tests
Deployment Speed: < 90s in Coolify
04

Developer Tools & Security

CertView: Offline X.509 Cryptographic Inspection Tooling for VS Code and JVM

An open-source developer extension published on the Visual Studio Marketplace. Inspects digital certificates (PEM, DER, PFX, JKS), validates Subject Alternative Names (SANs), alerts on expirations, and visualizes trust chains directly within the editor.

TypeScriptVS Code Extension APIX.509 PKIKotlinASN.1Node.js
Read technical case studyVisual Studio Marketplace listing

Key metrics

Availability: Official VS Code Marketplace
Security: 0 bytes transmitted over network
Formats: PEM, DER, PFX, P12, CER, CRT

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