At Poseidon Distribution OPC, I built and maintained the customer, merchant, and rider apps for an on-demand delivery and marketplace platform, along with its Next.js web dashboards. I shipped features across the UI, APIs, and Supabase PostgreSQL, including phone OTP, social sign-in, live delivery tracking, and in-app checkout.
I built Trusum, my BIR-compliant accounting SaaS, with a multi-tenant double-entry ledger covering invoicing, bills, banking, and tax workflows. Tenant isolation uses PostgreSQL RLS, and money calculations use Decimal.js; the project has 106 Vitest and Playwright test suites.
I also built TamangSahod, a Python and FastAPI payroll search tool for Philippine micro-businesses. It returns peso amounts with the official rule quoted word for word, using hybrid search, and its CI evaluations put the right rule in the top three for 96% of questions.
As a freelance full-stack developer and automation specialist, I built business websites, sales funnels, and automations, and delivered civic-tech and AI projects. I’ve also built lead-generation systems, CRM integrations, and automation workflows at Systemizedleadz OS.
