Marcus B.

Still chasing leads by hand, or sitting on a store that does not convert? I build AI agents, automations, and the custom web/ecommerce apps behind them so inbound demand turns into booked calls and paid orders. Not a demo chatbot. A system: site or store → form/checkout → CRM → messaging apps → the right person. I came from operations before engineering. I ask what the workflow is supposed to do for the business, then I build that. Primary focus — AI engineering: • Custom agents for intake, qualification, scheduling, and human handoff • n8n + API automations connecting CRM, forms, messaging apps, and internal alerts • FastAPI backends when n8n is not enough (auth, webhooks, integrations that have to stay up) Also — custom websites and ecommerce: • Production sites and storefronts in Next.js/React (no page builders) • Ecommerce flows: catalog, checkout, ops that turn browsers into customers • Lead systems for local and international businesses, not brochure pages Selected work: • Multi-agent messaging system for medical clinics: intake, triage, scheduling, CRM sync • Site and lead system for a fetal medicine practice • B2B site for a critical-infrastructure security company in Brazil • International product site for a fiber-optic perimeter platform • Custom ecommerce / storefront work for DTC brands (catalog, checkout, ops) • Production FastAPI auth (JWT, roles, password reset, tests, CI) Stack I ship with: Python, FastAPI, n8n, OpenAI/Claude/Gemini tool calling, Next.js, React, TypeScript, PostgreSQL, Supabase, Business API messaging, GoHighLevel when the client already lives there. I work async, I document the flow, and I tell you in the first reply if I can ship it. If you have an agent, a workflow, a site, or a store that should already be bringing qualified demand, send the current setup. I’ll tell you what I would build first.