I build financial platforms and AI-powered systems for real businesses. 5+ years shipping production systems that handle money, data, and critical decisions.
📍 Guadalajara, México · 🌐 marcoag.com · 📩 hi@marcoag.com
- Fintech platforms & ERPs — Custom systems that centralize financial operations, connect to banking APIs, and scale with the business
- AI automation — LLM integrations, RAG pipelines, and predictive models that solve real business problems
- System modernization — Legacy codebases rescued and restructured into maintainable, production-ready architectures
| Project | Stack | Impact |
|---|---|---|
| ERP · 40+ modules for investment firm | Next.js · NestJS · PostgreSQL | 80 internal users · contracts in minutes |
| Personal finance app · Plaid integration | Next.js · NestJS · OpenAI | 10,000+ connected institutions |
| RAG platform · internal data query | Node.js · Pinecone · OpenAI | Natural language search over company data |
| Automated dialing system | Python · VoIP/SIP · IBM Watson | 40,000+ calls/day |
| ML retention pipeline | Python · Scikit-learn · XGBoost | 89% prediction accuracy |
→ Full case studies at marcoag.com
- clegen — CLI to scaffold clean architecture modules for TypeScript projects
- nodejs-express-hexagonal-architecture — Production-ready hexagonal architecture boilerplate for Node.js + Express
- nestjs-typeorm-supabase-hexagonal — NestJS + TypeORM + Supabase with hexagonal architecture
- arquitectura-hexagonal — Educational hexagonal architecture reference implementation
Languages TypeScript · Python · Go · PHP · SQL
Backend NestJS · Node.js · FastAPI · Gin · Laravel
Frontend Next.js · React · Tailwind CSS
AI & Data OpenAI API · Anthropic API · Pinecone · Scikit-learn · XGBoost · RAG
Fintech Plaid · GBM API · SignNow
Infra PostgreSQL · MongoDB · Docker · AWS · Railway
I take on a limited number of clients at a time. When you hire me, you talk directly to me — no account managers, no handoffs.
If you have a project in mind: marcoag.com