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Alfonso-13/README.md

Always Learning. Always Building.

Neri Alfonso Menchaca Castillo

Senior Full Stack .NET Developer

.NET · Angular · Azure · REST APIs · Enterprise Applications · AI-Assisted Development

XERJ Corpus Hub contributor

LinkedIn · GitHub


About me

I am a Senior Full Stack .NET Developer who has been building software professionally since 2014. I design, develop, modernize, and support enterprise applications across aviation, financial services, insurance, tax compliance, coordination, and ERP environments.

My work combines backend development, modern web applications, cloud services, system integrations, and close collaboration with business and technical teams. I focus on maintainable solutions, reliable delivery, performance, and practical business outcomes.

What I do

  • Build and modernize enterprise applications with .NET and Angular.
  • Design REST APIs and integrations for business-critical systems.
  • Develop and operate cloud solutions using Microsoft Azure.
  • Improve performance, maintainability, and development workflows.
  • Translate business requirements into scalable technical solutions.
  • Support delivery through testing, technical documentation, and code review.

AI-assisted development and automation

I use generative AI and agentic coding tools throughout the software development lifecycle to support code generation, testing, code review, debugging, technical documentation, repetitive development tasks, small web applications, and single-page experiences.

I also use n8n to build workflow automations and integrations. AI-generated changes remain developer-assisted output: they are reviewed, tested, and validated before integration or release.

Tools I work with include GitHub Copilot, ChatGPT, OpenAI Codex, Claude Code, and n8n.

Featured projects

A full-stack AI demo that transforms free-form text into a Spanish summary, sentiment, detected language, keywords, and category through Google Gemini.

  • Engineering highlights: Svelte 5, Express 5, shared Zod contracts, structured AI output, rate limiting, request timeouts, secure server-side API key handling, and automated tests.
  • Privacy by design: analysis history stays in the browser and the original text is not stored by the server.
  • Built for learning and reuse: includes local setup, technical documentation, visual evidence, validation commands, and an MIT license.

Live demo · View repository · Feedback and contributions are welcome.

A configurable bilingual portfolio built with Angular and Ionic. Its independent My Universe experience uses Three.js to transform professional experience, education, and technical knowledge into an interactive 3D system.

  • Engineering highlights: Angular 22, Ionic 9, Three.js, TypeScript 6, JSON-driven content, responsive touch and keyboard navigation, persistent theme and language preferences, automated tests, and a reproducible GitHub Pages build.
  • Interactive storytelling: professional domains, clusters, and technologies are explored through a semantic orbital map designed for desktop and mobile.
  • Reusable by design: example configuration is separated from personal identity and assets, with technical documentation and an MIT-licensed codebase.

Live demo · View repository · Feedback and contributions are welcome.

Core expertise

Area Technologies and capabilities
Backend C#, .NET, ASP.NET Web API, REST APIs, enterprise integrations
Frontend Angular, TypeScript, JavaScript, React
Cloud and delivery Microsoft Azure, Azure Functions, Azure App Services, Azure DevOps, Git
Data and search SQL Server, Cosmos DB, MySQL, MongoDB, Elasticsearch
Architecture Enterprise applications, cloud solutions, system integrations, SaaS, software modernization
Quality Testing, debugging, code review, technical documentation, performance optimization

Professional perspective

My background spans the complete software delivery lifecycle: requirements analysis, architecture, development, deployment, production support, modernization, and collaboration across multidisciplinary teams.

I value solutions that are understandable, testable, maintainable, and aligned with the real needs of users and organizations. Technologies change; sound engineering judgment, ownership, and continuous learning remain central to how I work.

Resumen en español

Soy desarrollador Senior Full Stack .NET y desarrollo software profesionalmente desde 2014. Tengo experiencia diseñando, construyendo, modernizando y dando soporte a aplicaciones empresariales para sectores como aviación, servicios financieros, seguros, cumplimiento fiscal, coordinación y sistemas ERP.

Trabajo con .NET, Angular, Azure, APIs e integraciones, combinando experiencia técnica con entendimiento del negocio. También utilizo inteligencia artificial para apoyar actividades de desarrollo, pruebas, revisión, documentación y automatización, manteniendo siempre revisión y validación humana antes de integrar o liberar cambios.

Connect

The best way to contact me and learn more about my professional experience is through LinkedIn.


Last updated: 2026-11-10

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  1. AI-Text-Analyzer AI-Text-Analyzer Public

    Full-stack AI text analyzer built with Svelte 5, Node.js and Google Gemini. Generates summaries, sentiment, language, keywords and categories, with structured validation and private browser-local h…

    JavaScript 1

  2. briefcase.github.io briefcase.github.io Public

    Configurable Angular and Ionic portfolio with an interactive Three.js professional universe.

    TypeScript 1