FP&A | Financial Analysis | Finance Analytics
FP&A and finance analytics professional with 7+ years of experience across fintech, SaaS, and marketplace finance.
Work includes quarterly and annual forecasting, driver-based modeling, budget vs. actuals, rolling reforecasts, and revenue and contribution-margin analysis. SQL and Python are used to improve finance workflows and financial data integrity.
Work
Summaries of selected finance analysis. Full write-ups and supporting repositories are linked when they are ready for public use.
Corporate FP&A
A corporate FP&A case covering revenue drivers, workforce planning, departmental Opex, annual planning, budget vs. actuals, rolling reforecasting, risks and opportunities, and executive commentary.
Coming Soon
SaaS economics
Self-directed portfolio case using synthetic subscription data. Analysis of ARR and MRR growth, ARR bridge, retention, NRR, GRR, churn, CAC, LTV, payback, cohort behavior, contribution economics, and management reporting.
Revenue forecasting
Revenue forecasting across merchants using multiple forecasting approaches, model benchmarking, forecast-error analysis, and finance-oriented decision support.
Services
Occasional independent support for FP&A, forecasting, SaaS metrics, and finance analytics.
Budget vs. actuals, management reporting, KPI visibility, and financial performance analysis.
Driver-based forecasts, rolling outlooks, scenario analysis, and financial decision support.
ARR, retention, CAC, LTV, payback, contribution margin, and growth-efficiency analysis.
SQL, Python, data validation, reconciliations, reporting workflows, and finance process improvement.
About
Efrain Castillo is a finance professional with 7+ years of experience in FP&A, financial analysis, and finance analytics, including fintech, SaaS, marketplace finance, and finance systems.
He has owned FP&A work covering quarterly and annual forecasting, driver-based financial modeling, forecast-vs-actual analysis, scenario analysis, unit economics, KPI governance, and partnership across Finance, Product, and Risk.
Current contract accounting work strengthens reconciliation, reporting reliability, controls, and financial-data integrity. He holds an MBA and uses Excel, SQL, and Python to improve finance analysis and reporting.
Contact
For roles or independent FP&A / finance analytics work, use the links below.