# Efrain Castillo — Finance Portfolio

> Public portfolio for Efrain Castillo, a finance professional focused on FP&A, forecasting, financial analysis, and finance analytics.

This site contains selected self-directed finance case studies and professional background information. Portfolio projects should be interpreted as self-directed analytical work unless explicitly stated otherwise.

## Main Pages

- [Home](https://efrainfinance.com/): Professional background, FP&A positioning, selected work, services, and contact information.

Home, Services, About, and Contact are in-page sections of the homepage. Selected work also has dedicated HTML case-study pages listed below.

## Selected Work

- [Marketing Investment Economics](https://efrainfinance.com/work/marketing-investment-economics/): Self-directed portfolio project using synthetic data. Channel acquisition efficiency, contribution-margin payback, and downside sensitivity. [PDF](https://efrainfinance.com/assets/pdfs/marketing-investment-economics.pdf). Repository: [Marketing-Finance-Dashboard](https://github.com/ecastillo081/Marketing-Finance-Dashboard)
- [SaaS Growth Economics](https://efrainfinance.com/work/saas-growth-economics/): Self-directed portfolio case using synthetic subscription data. ARR and MRR growth, retention, NRR, GRR, CAC, LTV, payback, and contribution economics. [PDF](https://efrainfinance.com/assets/pdfs/saas-growth-economics.pdf). Repository: [SaaS-KPI-Dashboard](https://github.com/ecastillo081/SaaS-KPI-Dashboard)
- [Merchant Revenue Forecasting](https://efrainfinance.com/work/merchant-revenue-forecasting/): Self-directed portfolio project using synthetic data. Merchant-level revenue forecasting, model benchmarking, and forecast-error analysis. [PDF](https://efrainfinance.com/assets/pdfs/merchant-revenue-forecasting.pdf). Repository: [Merchant_Revenue_Forecasting](https://github.com/ecastillo081/Merchant_Revenue_Forecasting)

Corporate FP&A Operating Case is listed on the site as coming soon and does not yet have a public URL.

## External Profiles

- [LinkedIn](https://www.linkedin.com/in/efrain-castillo-jr/)
- [GitHub](https://github.com/ecastillo081)