Fernando Arturo C.

I build automations that replace manual back-office work, and I build them to survive production. Recent: a multi-tenant SaaS on Cloudflare Workers that serves an MCP server, an embedded CRM app and client-domain blogs from a single deploy, and a telehealth platform where a security review I ran found a hole that let one patient read another's records. Top Rated · 100% Job Success · 1,000+ hours · 25 contracts delivered. WHAT I BUILD ▸ GoHighLevel engineering: the technical half most GHL freelancers avoid. A2P 10DLC, SMTP/API email, domain mapping, lead routing, AI chat and voice agents, and pipeline architecture that doesn't collapse when you add a rep. I've delivered GHL systems for auto dealers, fitness and coaching businesses, and real estate. Some direct, some white-label for agencies who resell them. ▸ AI workflow automation: LLM pipelines, document and receipt extraction, agents that drive portals with no public API, and approval queues so nothing touches your production data unreviewed. ▸ Full-stack product work: React, TypeScript, Astro, Supabase (Postgres, RLS, RPC, edge functions), Cloudflare Workers, D1, R2 and Durable Objects. I also work in Lovable, Bolt, Base44 and Replit when speed matters more than architecture, and I know which situation you're in. ▸ Legacy and API integration: SQL Server, undocumented schemas, ERPs with no vendor support left. I map the data model before I write to it, and I prove the rollback before I run it. SOME OF WHAT I'VE SHIPPED (a few client names are withheld under NDA) • A multi-tenant SaaS on one Cloudflare Worker serving six surfaces: an MCP server on Durable Objects, a CRM-embedded app with SSO, blogs hosted on each client's own domain with automatic SSL, an admin console, a public API and an embed widget. Double OAuth, so the AI layer never sees the CRM's tokens. • A telehealth platform rebuilt from zero. Two review passes found an IDOR across four patient-data endpoints. One patient could look up another's cases by email. Closed with an ownership helper binding every identifier to the authenticated session, plus a second fix for a bug the first fix introduced. End-to-end tests run against the provider's real sandbox. • A DTC store with a multi-level affiliate network. Card handling moved to client-side tokenization, taking the payment page out of PCI SAQ D scope, and the payment endpoint hardened with origin validation, JWT and IP rate limiting. • A 14-year-old ERP with no vendor support, automated. Undocumented schema mapped, reporting suite built, and a bot that writes into the ERP behind a human approval queue. Every write gets a backup, a dry run and a verification. 154 test cases, zero failures. HOW I WORK Every write to your production data gets a backup, a dry run and a way back. You get a written technical debrief when we're done: the stack, the decisions, the traps in your data, and what I'd do next. The repo and every credential stay yours. I don't hold your system hostage. I'm not the cheapest option on this platform and I'm not trying to be. What you're paying for is that it still works in six months. English and Spanish, both native. Full overlap with US Eastern hours. Want to test-drive this first? Book a $25 consultation and bring your messiest manual process. I'll map it and tell you straight whether automating it is worth your money, even if the answer is no. Keywords: GoHighLevel, GHL, GHL expert, GHL automation, HighLevel workflows, A2P 10DLC, LeadConnector, Lovable, Lovable.dev, Lovable expert, Base44, Bolt.new, Replit, Cursor, vibe coding, Supabase, Supabase auth, Supabase RLS, edge functions, Postgres, Cloudflare Workers, Cloudflare D1, R2, Durable Objects, Cloudflare for SaaS, Astro, React, TypeScript, Next.js, MCP server, Model Context Protocol, AI automation, AI agent, LLM integration, Claude integration, OpenAI integration, browser automation, web scraping, document extraction, OCR, invoice automation, receipt parsing, Telegram bot, WhatsApp API, Twilio, Stripe integration, webhook, API integration, CRM automation, sales automation, lead routing, round robin, SQL Server, ERP integration, legacy system integration, data migration, WordPress migration, SaaS development, multi-tenant, internal tools, admin dashboard, client portal, bilingual developer, Spanish speaking developer