# Angel Velasquez — Senior Software Engineer & AI Solutions Architect

> Engineering portal and technical portfolio of Angel Rafael Velasquez Gonzalez (Angel Velasquez). Senior Software Engineer and AI Solutions Architect based in Lima, Peru (operating globally remote). Specializes in enterprise backend architecture (PHP 8.4, Symfony 7.2, DDD, Clean Architecture), mobile ecosystems (Android native, Kotlin 2.1, Kotlin Multiplatform KMP 2.1, Capacitor, TWA, Google Play & Apple App Store), and production applied AI (deterministic tool calling, structured JSON output, RAG, agentic workflows).

## Core Competencies & Architecture Stack

- **Enterprise Backend & Architecture:** PHP 8.4, Symfony 7.2, Domain-Driven Design (DDD), Clean Architecture, CQRS, API Platform, PostgreSQL, MySQL, Docker, Nginx, Linux.
- **Mobile Systems Engineering:** Native Android (Kotlin, Jetpack Compose, Coroutines, Flow), Kotlin Multiplatform (KMP 2.1), Capacitor 6/7 (iOS WebKit), Android Trusted Web Activities (TWA), Google Play Console & Apple App Store organization account management, Xcode Cloud CI/CD.
- **Applied AI & Agentic Workflows:** LLM APIs (Gemini 3.7 Flash, Claude 3.5/Opus/Sonnet, GPT-4o/5), Deterministic Function & Tool Calling, Structured JSON output with schema validation (Zod), Retrieval-Augmented Generation (RAG), Zero-hallucination pipelines, Webhook integrations.
- **Modern Web & Cloud Infrastructure:** Astro 5.4 (SSG / Islands architecture), TypeScript, Tailwind CSS v4, Cloudflare Pages & CDN, zero server cost deployments, 100/100 Lighthouse performance.

## Primary Routes & Localized Pages

- [Overview / Home (English)](https://angelvelasquez.dev/): Primary engineering portal in English.
- [Inicio / Home (Español)](https://angelvelasquez.dev/es/): Portal técnico en español.
- [Engineering Cases (English)](https://angelvelasquez.dev/cases/): Complete catalog of 9 enterprise case studies.
- [Casos de Estudio (Español)](https://angelvelasquez.dev/es/cases/): Catálogo completo de casos de ingeniería en español.
- [Career Experience Timeline (English)](https://angelvelasquez.dev/experience/): Detailed career journey and roles.
- [Trayectoria Profesional (Español)](https://angelvelasquez.dev/es/experience/): Cronología profesional detallada.
- [Technical Blog (English)](https://angelvelasquez.dev/blog/): In-depth architectural articles on Symfony DDD, KMP, and AI tool calling.
- [Blog Técnico (Español)](https://angelvelasquez.dev/es/blog/): Artículos técnicos profundos de arquitectura de software e IA.

## Cornerstone Architecture Articles

- [Domain-Driven Design (DDD) & Clean Architecture in PHP 8.4 and Symfony 7.2](https://angelvelasquez.dev/blog/symfony-php-ddd-architecture/): Enterprise bounded contexts, pure aggregate invariants, and CQRS via Messenger. ([Versión en Español](https://angelvelasquez.dev/es/blog/symfony-php-ddd-arquitectura/))
- [Kotlin Multiplatform (KMP 2.1) vs TWA vs Capacitor: Enterprise Mobile Decision Matrix](https://angelvelasquez.dev/blog/mobile-systems-kmp-twa-capacitor/): Tradeoffs between native logic sharing, Chrome TWA, and WebKit Capacitor for store releases. ([Versión en Español](https://angelvelasquez.dev/es/blog/sistemas-moviles-kmp-twa-capacitor/))
- [Deterministic AI Agents: Architecture for Tool Calling Without Hallucinations](https://angelvelasquez.dev/blog/deterministic-ai-agent-tool-calling/): Production patterns using LLMs as semantic routers with strict runtime Zod validation and rollbacks. ([Versión en Español](https://angelvelasquez.dev/es/blog/orquestacion-agentes-ia-tool-calling/))

## Key Case Studies (Production Records)

1. [French Enterprise Wealth & Pension Platform](https://angelvelasquez.dev/cases/french-pension-platform/): Critical transactional core refactored to PHP 8 and Symfony Clean Architecture/DDD. +99.98% operational uptime, 0 data corruption incidents.
2. [Panaservice Mobile Enterprise Ecosystem](https://angelvelasquez.dev/cases/panaservice-mobile-ecosystem/): Dual-store deployment (Google Play TWA + Apple App Store Capacitor 6 via Xcode Cloud and Unlisted App Distribution). 100% compliant with corporate organization policies.
3. [Autonomous AI Agent & Tool Calling Engine](https://angelvelasquez.dev/cases/ai-agent-workflow-engine/): Deterministic LLM agent pipeline with strict JSON schema validation, tool execution, and zero-hallucination guardrails. 99.8% output precision.
4. [MacMirror for Android & macOS](https://angelvelasquez.dev/cases/macmirror-notifications/): Low-latency notification relay between Android and macOS via local Wi-Fi with end-to-end encryption (AES-256-GCM) and zero cloud dependencies.
5. [Blumax Bluetooth Audio Routing](https://angelvelasquez.dev/cases/blumax-audio-engine/): Android foreground service for real-time audio routing between Bluetooth headsets and external loudspeakers. <1% battery overhead.
6. [Magnet Solutions Corporate Web Platform](https://angelvelasquez.dev/cases/magnet-solutions-web/): Institutional platform built with Astro SSG on Cloudflare Pages. 100/100 Lighthouse, instant load, zero maintenance costs.
7. [Ainhoa Store E-Commerce Platform](https://angelvelasquez.dev/cases/ainhoa-store-ecommerce/): High-speed catalog and digital store deployed statically on Cloudflare CDN.
8. [Wiser Meeting KMP Workspace](https://angelvelasquez.dev/cases/wiser-meeting-kmp/): Cross-platform workspace app sharing 75%+ core business logic via Kotlin Multiplatform.
9. [Finero Personal Finance Tracker](https://angelvelasquez.dev/cases/finero-finance-tracker/): Offline-first personal finance tracking utility on Android with clean MVVM architecture.

## Direct Verification & Professional Contact

- **Website:** https://angelvelasquez.dev
- **Email:** angelvelasquezdev@gmail.com
- **LinkedIn:** https://www.linkedin.com/in/angelvelasquezdev
- **GitHub:** https://github.com/angelvelasquezdev
- **Full Context for LLMs:** https://angelvelasquez.dev/llms-full.txt