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Felipe Marques

@felipemarques1

Full-Stack Software Developer at Keeper and co-founder of FazzLeads, building a WhatsApp AI agent that books around 200 property visits monthly.

Brazil

Message

At Keeper, I built an OpenAI-powered support assistant for the internal team using function calling and RAG over indexed documents in Dify. I also replaced manual ticket issuing with a batch screen and reduced ECS CPU and memory usage by 25% on average.

At FazzLeads, I put a WhatsApp AI agent into production to qualify leads, recommend listings, move them through the CRM funnel, and book around 200 property visits a month. I replaced GoHighLevel’s native AI with an agent using Mastra AI and MCP, and built AI-prepared reactivation campaigns that raised the response rate by 62%.

Experience

Work history, roles, and key accomplishments

Current

Mid-Level Full-Stack Developer

Current

Keeper

Jun 2026 - Present (5 months)

Built an AI support assistant for the internal team using the OpenAI API, including system prompts, function calling, and RAG over a Dify knowledge base. Also built the CS team's batch ticket screen and optimized ECS CPU and memory usage.

OpenAI API Function Calling RAG Dify AWS AWS ECS Docker Granian HTTP Client Reuse

Current

Co-Founder & Software Engineer

Current

FazzLeads

Jun 2024 - Present (2 years 5 months)

Developed a WhatsApp AI agent for lead qualification and booking, replacing GoHighLevel's native AI with a Mastra AI and MCP-based agent. Built RAG with pgvector and integrated the OpenAI API, increasing response rates by 62%.

OpenAI API Mastra.Ai MCP RAG Pgvector PostgreSQL Function Calling Prompt Engineering

Full-Stack Developer

MindGroup Consulting e Marketing

Feb 2025 - May 2026 (1 year 3 months)

Architected three production systems as modular monoliths using NestJS, DDD, Next.js, Docker, and CI/CD. Automated bulk imports, bank transaction processing, and invoicing, reducing manual work by over 40 hours per month.

NestJS DDD Next.js Docker CI CD MySQL Cursor Pagination Automation