Gerardo Manuel Reyes Fernández

Senior Full-Stack Engineer | Forward Deployment Engineer | Frontend Architect | Technical Consultant

Mexico City, Mexico | contact@gerardo-reyes.site | LinkedIn | GitHub | Blog

Professional Summary

Senior Full-Stack Engineer & Forward Deployment Engineer with 8+ years building scalable web applications across fintech, healthcare, insurance, and enterprise retail. Specialized in leading complex Angular migrations (v8→v18), architecting microfrontend systems with Nx monorepos, designing multi-tenant SaaS platforms, and deploying to edge platforms (Cloudflare, Workers, R2). Proven track record as technical consultant with international mentorship impact (Mexico, Chile, Peru). Key achievements include 75% build time reduction, 57% Core Web Vitals improvement, and contributing to contract extensions through technical excellence. Currently researching software architecture patterns (DDD, Event-Driven, Microservices) and integrating AI tooling to accelerate development cycles.

Technical Skills

Frontend (Expert): Angular 8-19 (Signals, Standalone Components, Reactive Forms), React 19, Next.js 15 (App Router, SSG, CSR, Server Actions), Vue 3, TypeScript, RxJS, NgRx, Redux, Zustand

Frontend Architecture: Microfrontends, Nx Monorepos, Module Federation, Component Libraries, Design Systems, Angular Material, Tailwind CSS, Sass

Backend: Node.js, NestJS, .NET/C# (Clean Architecture), Spring Boot, Go, REST APIs, GraphQL, Socket.IO, WebSockets, SSE

Databases: MongoDB (Compound Indexes, TTL, Aggregation), MySQL, PostgreSQL, Firebase/Firestore, Redis

Cloud & DevOps: GCP (Cloud Functions, Cloud Run), AWS, Docker, Dokploy, Traefik, Jenkins, CI/CD, GitHub Actions

Security & Quality: JWT, OAuth 2.0, SSO, OWASP, WCAG, Fortify, Twistlock, SonarQube

AI & Productivity: Claude, Claude Code, GitHub Copilot, Codex, Gemini, ChatGPT, NotebookLM, Mistral AI, Prompt Engineering

Professional Experience

Senior Software Engineer, System Architect & Forward Deployment Engineer

Tech Blog – Astro Edge Platform | May 2026

• Migrated a technical editorial architecture from AWS to Cloudflare’s free tier; built a high-availability solution for 15,000+ daily visits at $0 OPEX
• Designed serverless analytics on Cloudflare Workers + D1 (SQLite), mitigating write-inflation with atomic upserts and client-side deduplication via sessionStorage
• Authored a custom HAST compiler plugin (rehypeMermaidTabs) processing Mermaid at build time with client-side dynamic imports + IntersectionObserver, removing headless-Chromium build dependencies
• Achieved sub-500ms FCP/LCP with CSS tokens and scoped styles in Astro 6 (no FOUC via inline head scripts + immutable edge cache headers); layered JSON-LD (Person, WebSite, TechArticle) and flat URLs with backward-compatible redirects
• Used Claude Code as an AI copilot across the full development and planning lifecycle — architecture, implementation, and refactoring

Stack: Astro 6, TypeScript, Cloudflare Workers, D1 (SQLite), HAST/rehype, Giscus, Claude Code

Software Architect, Lead Developer & Forward Deployment Engineer

Gerard Reyes Music – Secure Edge Audio Platform | Apr 2026 – Present

• Designed and deployed a serverless music platform with Next.js 14 (App Router) on Cloudflare Workers via OpenNextJS; hybrid SSG/SSR for SEO and load times
• Architected secure audio with private Cloudflare R2 and S3-compatible pre-signed URLs (300s TTL): on-the-fly signature generation and in-memory token auto-renewal, zero client-side credential exposure
• Isolated a decoupled signing microservice (independent Worker with its own CI/CD) for credential rotation without redeploying the frontend
• Built a persistent global player (React Context) with synced lyrics, feature-flag rollouts, HTML5 Range streaming (HTTP 206 Partial Content), and a custom useLazyGSAP hook (IntersectionObserver) to protect LCP/TBT; JSON-LD MusicGroup/Recording schemas
• Used Claude Code as an AI copilot across the full development and planning lifecycle — architecture, implementation, and refactoring

Stack: Next.js 14 (App Router), React, TypeScript, Cloudflare Workers, R2, OpenNextJS, aws4fetch, HTML5 Audio, GSAP, Claude Code

Full Stack & AI Engineer

DC Vent – Fintech | Nov 2025 – Dec 2025

• Delivered complete MVP in 3 weeks: dynamic calculations, advanced tables, custom filters, XLSX report export
• Implemented SSO token exchange system and complete RBAC module (roles, users, permissions)
• Designed normalized MySQL database schema; built REST APIs with .NET Clean Architecture
• Drove the full development and planning lifecycle with AI copilots (Claude Code, Codex, Gemini CLI), enabling the sub-3-week delivery while maintaining code quality standards

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

Technical Founder & Full Stack Engineer

Live Restaurant – Real-Time Karaoke & Valet Parking SaaS | Sep 2025 – Present

• Designed production-ready multi-tenant SaaS architecture supporting 64-68 tenants with complete tenant isolation
• Built monorepo structure (frontend/backend/shared) enabling code sharing and independent deployments
• Architected dedicated Socket.IO server for 3,600+ concurrent WebSocket connections (avoiding sticky sessions)
• Implemented LRU in-memory caching, compound MongoDB indexes with TTL, achieving <50ms API response target
• Hardened security with hashed URLs, XSS sanitization, and dynamic QR code generation
• Deployed with Dokploy + Traefik: 4 API containers, round-robin load balancing, rolling updates, zero-downtime
• Migrated from single-tenant to multi-tenant architecture for scalable 60-day trial model, with an AI-assisted workflow (Claude Code, Codex, Gemini)

Stack: Next.js 15, React 19, Socket.IO, MongoDB, Dokploy, Traefik, TypeScript, GCP

Software Architect & Lead Developer

Professional Identity Platform – Headless CMS & Portfolio | May 2020 – Present

• Led the conception, design, and evolution of a Headless CMS for dynamic professional-identity management, transforming a legacy system into a modern infrastructure
• Orchestrated the Angular → Next.js 15 transition, prioritizing radical mobile LCP reduction via Static Site Generation (SSG)
• Designed a $0-OPEX hybrid topology with Cloudflare (Edge Proxy + WAF) and Firebase Hosting for high availability and perimeter security
• Ran a two-layer AI workflow — architectural debate (Gemini) and assisted execution (Claude); integrated a Mistral AI chatbot chosen on privacy/inference/cost, with Firestore + Zod validation and bilingual i18n via DeepL API
• Since October 2025, drove the platform’s development and planning with Claude Code as the primary AI copilot

Stack: Next.js 15, Angular, React, TypeScript, Firestore, Cloudflare, Firebase, Mistral AI, Zod, DeepL, Claude Code

Full Stack Engineer

Freelance – Attendance & Payments Platform | Feb 2025 – Jun 2025

• Architected and built platform from scratch for attendance management and payment processing
• Led technical modernization: Angular 16→18 migration with Signals and Standalone Components
• Implemented advanced reporting system and intelligent tagging to optimize collections workflow
• Served as strategic technical partner, guiding product evolution through complete development lifecycle

Stack: Angular 18, Firebase, TypeScript, PWA, Sass

Full Stack Engineer

Cognizant – EHealth – Healthcare | Jul 2024 – Dec 2024

• Developed medical plan recommendation engine with pixel-perfect Figma implementations
• Modified and optimized backend APIs to support new frontend features
• Maintained 90%+ unit test coverage; delivered WCAG-compliant accessible interfaces
• Collaborated continuously with UX/UI teams to deliver user-centered products

Stack: Vue.js, GraphQL, TypeScript, Sass, Webpack, Jenkins

Senior Frontend Engineer

Cognizant – Equifax – Insurance (ACA Compliance) | Aug 2022 – Jul 2024

• Led Angular 12→16 and Nx 13→17 migrations; improved Largest Contentful Paint from 4.2s to 1.8s (57% improvement)
• Reduced build time from 12 min to 3 min (75% improvement) through bundle optimization and lazy loading
• Served as technical consultant to Tech Lead: provided architecture proposals to improve development velocity
• Resolved 50+ critical security vulnerabilities (Fortify, Twistlock); enforced OWASP/WCAG across 200k+ LOC
• Established coding standards, conducted code reviews, mentored team members
• Contributed to contract extension from 6 months to 2 years through consistent technical excellence
• Contributed to backend API development with Spring Boot; used SonarQube for continuous quality improvement

Stack: Angular, Nx, Spring Boot, TypeScript, RxJS, Jenkins, SonarQube, GCP

Frontend Lead

Cognizant-Softvision – Walmart Kalos – Enterprise Retail | Oct 2021 – Jun 2022

• Led frontend team of 8 engineers; collaborated with Software Architect on technical strategy
• Executed complex Angular/NgRx v8→v13 migration; modernized state management reducing bugs by 60%
• Built and extended reusable component library with Angular Material; accelerated feature delivery by 35%
• Directed code reviews, unblocked developers, led integration sessions with Backend, QA, and Mobile teams
• Acted as bridge between Product, Design, and Development; provided technical feasibility consulting on UX/UI
• Ensured OWASP security and WCAG accessibility best practices across all deliverables

Stack: Angular, NgRx, Angular Material, TypeScript, RxJS, Jenkins, Sass

Senior Frontend Engineer

Equifax – Cyber Division – Banking & Financial Services (MEX/CL/Peru) | Feb 2020 – Jul 2021

• Part of team that planned migration from ActionScript to Angular for multi-client platform
• Initially mentored specific Angular team in CDMX, then scaled to mentoring dozens of developers
• Expanded mentorship internationally across Mexico, Chile, and Peru as project grew
• Provided architecture consulting for cloud applications with Angular 8-12
• Created dynamic component libraries; resolved critical vulnerabilities for web and mobile interfaces

Stack: Angular 8-12, TypeScript, RxJS, AWS, GCP, Docker, Jenkins

Frontend Engineer

Indra – Santander Bank – Banking | May 2019 – Nov 2019

• Developed complex dynamic electronic forms using Angular Reactive Forms and RxJS
• Led code restructuring in critical modules; implemented reusable components and communication patterns
• Ensured compliance with banking industry security standards in high-criticality application
• Acted as technical mentor: unblocked complex tasks, ensured sprint completion, trained developers

Stack: Angular, RxJS, TypeScript, JWT, AWS, Bootstrap, Sass

Full Stack Engineer

Concrad, Clinica-Relox, UNAM Aquarium | Oct 2017 – Jan 2019

• Built complete ERP systems: Purchasing, Sales, Auditing, Inventory Control modules
• Developed healthcare management platform: appointments, patient records, clinical assessments
• Implemented JWT authentication with role-based permissions; created dynamic reporting modules
• Built internal digital library for UNAM with advanced PDF search and filtering

Stack: Angular, Node.js, MySQL, PostgreSQL, JWT, RxJS, Bootstrap

Certifications & Continuous Learning

80+ verified certifications across Udemy, Platzi, LinkedIn Learning, and Pluralsight

• Frontend & Frameworks: Angular (Zero to Expert, Reactive, Performance, Professional), React.js, Vue.js, Redux/NgRx, RxJS Pro, TypeScript Design Patterns
• Backend & Architecture: NodeJS Complete Guide (MVC, REST, GraphQL), NestJS, Go Programming, C#/OOP, .NET Fundamentals, Docker, Jenkins, SQL/MySQL, MongoDB
• AI & Emerging Technologies: Claude Code, ChatGPT, Gemini AI Masterclass, Prompt Engineering, AI Tools for Developers, MCP with Azure, N8N Automation, Cybersecurity
• Learning Paths (Platzi): Frontend Architecture, Angular In-Depth, Node.js Backend, Backend with Go, DevOps & Server Admin, Databases

Architecture Research & Applied Learning

Actively researching software architecture patterns using AI-assisted tools (NotebookLM) for applied learning. Currently applying these concepts to the Live Restaurant multi-tenant SaaS platform.

Focus Areas: Multi-Tenant SaaS Architecture, Domain-Driven Design, Microservices Patterns, Event-Driven Architecture, Distributed Systems, API Design

Reference Materials: Building Multi-Tenant SaaS Architectures, Fundamentals of Software Architecture, Building Microservices, Domain-Driven Design Distilled, Software Architecture: The Hard Parts

Languages

Spanish: Native | English: Professional Working Proficiency (B2-C1)

Additional Interests

Photography (Landscape & Night Photography certified) | Home Automation (IoT/Raspberry Pi) | Digital Design (Illustrator, Photoshop, Inkscape)