Gerardo Manuel Reyes Fernández

Tech Blog — Astro Edge Platform

Senior Software Engineer, System Architect & Forward Deployment Engineer | May 2026

• Migrated a technical editorial architecture from AWS to Cloudflare’s free tier, building a high-availability solution for 15,000+ daily visits at $0 OPEX.
• Designed a serverless analytics backend on Cloudflare Workers + D1 (SQLite), mitigating write-inflation through atomic upserts and client-side deduplication via sessionStorage.
• Authored a custom HAST compiler plugin (rehypeMermaidTabs) that processes Mermaid diagrams at build time and dynamic-imports them client-side with IntersectionObserver, eliminating any headless-Chromium build dependency.
• Hit sub-500ms FCP/LCP with pure CSS tokens and scoped styles in Astro 6, removing FOUC via blocking inline head scripts and immutable edge cache headers; layered JSON-LD (Person, WebSite, TechArticle) and flat URLs with backward-compatible redirects for SEO.
• Used Claude Code as an AI copilot throughout the entire development and planning lifecycle — from architecture decisions to implementation and refactoring.

Astro 6 · TypeScript · Cloudflare Workers · D1 (SQLite) · HAST/rehype · Giscus · Claude Code

Gerard Reyes Music — Secure Edge Audio Platform

Software Architect, Lead Developer & Forward Deployment Engineer | Apr 2026 — Present

• Designed and deployed a serverless music platform with Next.js 14 (App Router) on Cloudflare Workers via OpenNextJS, using hybrid SSG/SSR to maximize SEO and load times.
• Architected secure audio with private Cloudflare R2 and S3-compatible pre-signed URLs (300s TTL), generating signatures on-the-fly and auto-renewing tokens in-memory before expiry — zero client-side credential exposure.
• Isolated a decoupled signing microservice (independent Worker with its own CI/CD) enabling credential rotation without redeploying the frontend.
• Built a persistent global player (React Context) with synced lyrics and feature-flag rollouts; HTML5 Range requests stream HTTP 206 Partial Content buffer-free, and a custom useLazyGSAP hook (IntersectionObserver) protects LCP/TBT. JSON-LD MusicGroup/Recording schemas for organic visibility.
• Used Claude Code as an AI copilot throughout the entire development and planning lifecycle — from architecture decisions to implementation and refactoring.

Next.js 14 · React · TypeScript · Cloudflare Workers · R2 · OpenNextJS · aws4fetch · GSAP · Claude Code

Live Restaurant — Real-Time SaaS

Technical Founder & Full Stack Engineer | Sep 2025 — Present

• Designed a production-ready multi-tenant SaaS architecture with complete isolation, capable of supporting 64-68 tenants on a single server.
• Built a monorepo (frontend/backend/shared) with Next.js 15, React 19, and a dedicated Socket.IO server architected for 3,600+ concurrent WebSocket connections.
• Implemented API-driven dynamic tenant configuration, LRU caching, and compound MongoDB indexes targeting <50ms API response; hardened with hashed URLs, XSS sanitization, and dynamic QR code generation.
• Deployed the infrastructure with Dokploy + Traefik (4 API containers, round-robin load balancing, zero-downtime rolling updates), with an AI-assisted workflow (Claude Code, Codex, Gemini) for code and logic optimization.

Next.js 15 · React 19 · Socket.IO · MongoDB · Dokploy · Traefik · TypeScript · GCP

Professional Identity Platform — Headless CMS & Portfolio

Software Architect & Lead Developer | May 2020 — Present

• Led the conception, design, and evolution of a Headless CMS for managing professional identity, transforming a legacy system into an optimized infrastructure.
• Orchestrated the transition from Angular to Next.js 15, prioritizing a radical mobile LCP reduction via Static Site Generation (SSG).
• Designed a hybrid topology with Cloudflare (Edge Proxy + WAF) and Firebase Hosting, achieving high availability and perimeter security at $0 monthly OPEX.
• Ran a two-layer AI workflow — architectural debate (trade-off analysis with Gemini) and technical execution (assisted coding with Claude); integrated a Mistral AI chatbot chosen after a 3-pillar evaluation (privacy, inference efficiency, cost), with Firestore persistence validated by Zod and bilingual i18n via the DeepL API.
• Since October 2025, drove the platform’s development and planning with Claude Code as the primary AI copilot.

Next.js 15 · Angular · React · TypeScript · Firestore · Cloudflare · Mistral AI · Zod · DeepL · Claude Code

DC Vent — Fintech

Full Stack & AI Engineer | Nov 2025 — Dec 2025

• Delivered a working MVP in under 3 weeks with React and Node.js on a Lovable template, adding dynamic calculations, tables, advanced search, filters, and XLSX report export.
• Implemented complete RBAC modules (roles, users, permissions) and an SSO token exchange system.
• Designed the MySQL database schema and built the endpoints in .NET with Clean Architecture; the frontend with Vue.js.
• Drove the full development and planning lifecycle with AI copilots (Claude Code, Codex, Gemini CLI), enabling delivery in under 3 weeks.

React · Vue · Node.js · .NET / C# · MySQL · MongoDB · JWT · TypeScript · Claude Code · Codex · Gemini CLI

Attendance & Payments Platform

Full Stack Engineer — Freelance | Feb 2025 — Jun 2025

• Was architect and creator of an attendance management and payment processing platform, designing its core with Angular and Firebase.
• Executed a complete technical modernization, migrating the application from Angular 16 to 18.
• As the client’s strategic partner, added an advanced reporting system and intelligent tagging that optimized the collections workflow.

Angular 18 · Firebase · TypeScript · PWA · Sass · GCP

Cognizant — Professional Development & CV Creator

Front Developer | Dec 2024 — Feb 2025

• Led the initiative and development of “CV Creator”, an internal tool built from scratch with Angular 19 to standardize team profile updates.
• Implemented Signals for reactive state management and a modern architecture based on Standalone Components.
• Completed strategic training in Cybersecurity, React, Vue, and AI tooling (Copilot).

Angular 19 · React · Vue · TypeScript · JavaScript

Cognizant — EHealth (Healthcare)

Full Stack Engineer | Jul 2024 — Dec 2024

• Developed a medical plan recommendation engine with pixel-perfect Figma implementations.
• Modified and optimized backend APIs to support new frontend features.
• Maintained 90%+ unit test coverage and delivered WCAG-compliant accessible interfaces, collaborating continuously with UX/UI.

Vue.js · GraphQL · TypeScript · Sass · Webpack · Jenkins

Cognizant — Equifax (Insurance)

Senior Frontend Engineer | Aug 2022 — Jul 2024

• Led the implementation of a microfrontend architecture with Nx to manage a complex monorepo, improving scalability and team autonomy.
• Orchestrated the Angular 12→16 and Nx 13→17 migrations, improving LCP from 4.2s to 1.8s (57%) and reducing build time from 12 to 3 min (75%).
• Led the mitigation of 50+ security vulnerabilities (Fortify, Twistlock), enforcing OWASP and WCAG standards across 200k+ LOC.
• Served as technical reference and frontend consultant; contributed to extending the contract from 6 months to 2 years.

Angular · Nx · Spring Boot · TypeScript · RxJS · Jenkins · SonarQube · GCP

Cognizant-Softvision — Walmart Kalos (Retail)

Frontend Lead | Oct 2021 — Jun 2022

• Took on the Frontend Lead role for a team of 8 engineers, defining technical strategy alongside the Software Architect.
• Executed the complete Angular/NgRx v8→v13 migration, reducing state bugs by 60%.
• Led the creation of a reusable component library with Angular Material, accelerating delivery by 35%.
• Acted as a bridge between Product, Design, and Development, providing technical feasibility consulting with a focus on OWASP and WCAG.

Angular · NgRx · Angular Material · TypeScript · RxJS · Jenkins · Sass

Equifax — Cyber Division (Banking MEX/CL/PE)

Senior Frontend Engineer | Feb 2020 — Jul 2021

• Took part in planning the ActionScript-to-Angular migration for a multi-client platform.
• Scaled mentorship from a specific team in Mexico City to dozens of developers across Mexico, Chile, and Peru.
• Provided architecture consulting for cloud applications with Angular 8-12 and built dynamic component libraries.
• Developed Node.js/TypeScript microservices with Sockets and SSE for third-party Dialer integration.

Angular 8-12 · TypeScript · RxJS · Node.js · AWS · GCP · Docker · Jenkins

Earlier Experience · 2017 — 2019

Frontend & Full-Stack Engineer | Indra · Santander, Concrad, Clínica-Relox, UNAM

• Built complex banking forms for Santander (Angular Reactive Forms, RxJS) under strict financial-security compliance, and delivered end-to-end ERP and healthcare platforms — purchasing, sales, inventory, appointment scheduling, and clinical records — with Angular, Node.js, and MySQL.

Angular · Node.js · MySQL · RxJS · TypeScript · JWT · Bootstrap