Open to opportunities

Marcos Cal

@marcoscal

Message

I build production AI systems—owning architecture, backend, infra, deploys, and on-call from first commit to live.

Brazil

Message

What I'm looking for

I’m looking for remote opportunities (US, EU, LATAM time zones) where I can build and operate production AI/LLM systems end-to-end—owning architecture, backend, infra, deploys, and the on-call that follows.

I’m an AI / Software Engineer who builds production AI systems alone, from first commit to live incident. I’m strong in TypeScript and Python, distributed workers and queues, serverless infra, and shipping AI integration directly into real products.

I’ve founded and led multiple live LLM/agent platforms: Zarky (a NestJS/Next.js + AI intelligence and smart routing system with microservices, 6 Dockerized workers, PostgreSQL/Prisma, Redis, and Gemini, plus Terraform/GitHub Actions CI/CD and on-call ownership) and Ghost Workforce (Bloomberg-like intel over Dubai Land Department data, with a continuous trust validator and audit-queryable provenance). I also built Forgem (LLM-powered AI SDR on WhatsApp using Llama 3.3 with RAG, guardrails, human handoff on a Cloudflare Workers + D1 + Workers AI stack) and a programmatic LLM content pipeline at SEO Empire (6,800+ articles across 59 domains) while enforcing quality gates and monitoring.

Experience

Work history, roles, and key accomplishments

Current

Founder and Lead Engineer

Current

Zarky

Jan 2025 - Present (1 year 4 months)

Architected and built a production AI routing platform in a pnpm monorepo (1,600+ files) with a NestJS API and Next.js web, backed by PostgreSQL, Redis, and Prisma migrations. Developed a microservice/worker architecture with 6 Dockerized AI workers (analysis, alerts, comment and social scraping) and shipped full CI/CD and infrastructure automation using GitHub Actions and Terraform.

TypeScript NestJS Next.js PostgreSQL Prisma Redis Docker Terraform CI CD Gemini

Current

Founder and Engineer

Current

Ghost Workforce

Jan 2025 - Present (1 year 4 months)

Designed and shipped a Bloomberg Terminal-style Dubai real estate intelligence platform using an open dataset covering 1,963 buildings across 35 areas. Built and operated solo a fused intel map and continuous trust validator with an append-only provenance ledger, deployed a $497/mo production service, and automated hourly/daily cron pipelines via Railway.

Next.js React Supabase Postgres Mapbox CesiumJS Stripe Billing Cloud Workers Cron Jobs

Current

Founder and Engineer

Current

Forgem

Jan 2024 - Present (2 years 4 months)

Built a production AI SDR for WhatsApp that qualifies leads and runs end-to-end conversations with Llama 3.3 using RAG, context memory, guardrails, and human handoff. Implemented a multi-tenant serverless system on Cloudflare Workers with D1 and Stripe (Pix BR), enforced 300+ automated tests with 70% coverage, and enabled atomic deploys in ~14 seconds.

Cloudflare Workers RAG Prompt Engineering WhatsApp Automation Stripe Resend GuardRails

Current

Founder and Engineer

Current

SEO Empire

Jan 2023 - Present (3 years 4 months)

Developed an LLM-driven programmatic content and data pipeline that shipped ~6,800 articles across 59 domains. Implemented entity-graph grounding on real data with deduplication and quality gates, and automated indexing/monitoring via Google Search Console and Bing Webmaster APIs across 16 content clusters.