About

I'm Guilherme, but you can call me Guibs. I'm a freelance AI Developer and Salesforce Marketing Cloud specialist. I started in a CRM team in 2018 and have been building marketing technology ever since — now with LLMs in the loop.

Experience

Most of my career sits where marketing and engineering meet: Journey Builder custom activities for a digital bank, APIs feeding Salesforce Marketing Cloud, Segment integrations, and high-volume email and push pipelines. Today I bring that MarTech background to AI — LLM agents that work with CRM and campaign data.

  1. May 2026 - Present

    Freelance · AI Developer & Salesforce Marketing Cloud Specialist

    AI agents and LLM features for CRM and marketing teams, plus Salesforce Marketing Cloud development and integrations.

  2. Jun 2025 - Apr 2026

    Redarbor Brasil · Backend Developer

    Serverless Node.js on AWS (Lambda, SQS, EventBridge) powering high-volume email and push notification triggers integrated with HubSpot.

  3. Jun 2022 - Jun 2025

    Catho · Backend Developer

    API endpoints connecting internal databases to Salesforce Marketing Cloud for multi-channel automation, Twilio Segment integration, a Go alert system on RabbitMQ, and a Node.js WhatsApp messaging middleware.

  4. Sep 2020 - Jun 2022

    Enext Consultoria · Fullstack Developer

    Dedicated to C6 Bank: full-stack Journey Builder Custom Activities for Salesforce Marketing Cloud in Node.js, and integrations between Marketing Cloud, Google Sheets and Google Analytics.

  5. Jul 2018 - May 2020

    Catho · CRM Apprentice → Junior Backend Developer

    Started in an agile squad between the CRM and backend teams, then built PHP/Laravel middleware and SQL pipelines integrating legacy databases with marketing platforms.

Certifications

  • Salesforce Certified Marketing Cloud Administrator — Jul 2021 · Credential ID 22349555
  • Salesforce Certified Marketing Cloud Developer — May 2021 · Credential ID 22176479
  • Salesforce Certified Marketing Cloud Email Specialist — Jan 2021 · Credential ID 21826055
  • Segment Certified Marketer — Feb 2025

Education

I study Internet Systems (Sistemas para Internet) at Descomplica.

Skills

  • AI & LLMs: LLM agents, Tool / function calling, Agent memory, Prompt engineering, OpenRouter, Ollama, NVIDIA NIM, Bun
  • MarTech: Salesforce Marketing Cloud: Salesforce Marketing Cloud, AMPscript, Server-Side JavaScript (SSJS), Journey Builder, Journey Builder Custom Activities, Email Studio, Content Builder, Automation Studio, Data Extensions, SQL, Segment
  • Software engineering: TypeScript, Node.js, Go, AWS (Lambda, SQS, EventBridge), RabbitMQ, Docker, Terraform, React, Next.js

Projects

Outside of client work I build AI agents and personal tools — see the projects page for the full list.

Résumé

Download résumé (PDF)

Frequently asked questions

Who is Guilherme Salviano?
Guilherme Salviano, also known as Guibs, is a Brazilian freelance AI Developer and Salesforce Marketing Cloud specialist. He has worked in marketing technology since 2018, at companies including Catho, Enext Consultoria and Redarbor, and studies Internet Systems at Descomplica.
What does he build as an AI Developer?
AI agents and LLM-powered features for CRM and marketing teams: agents with tool calling, persistent memory and scheduled background tasks, and agents that read campaign analytics and answer questions about open rates, segments and trends. His open-source Koris framework runs the same agent across Telegram, WhatsApp, a terminal UI and a web dashboard.
What does he do in Salesforce Marketing Cloud?
MarTech development on Salesforce Marketing Cloud: AMPscript and server-side JavaScript, Journey Builder journeys and full-stack custom activities, Email Studio and Content Builder, data extensions and SQL, Automation Studio, and API integrations between Marketing Cloud and other systems.
Which certifications does he hold?
Salesforce Certified Marketing Cloud Administrator, Salesforce Certified Marketing Cloud Developer, Salesforce Certified Marketing Cloud Email Specialist, Segment Certified Marketer.
Which technologies does he work with?
AI: LLM agents, Tool / function calling, Agent memory, Prompt engineering, OpenRouter, Ollama, NVIDIA NIM, Bun. MarTech: Salesforce Marketing Cloud, AMPscript, Server-Side JavaScript (SSJS), Journey Builder, Journey Builder Custom Activities, Email Studio, Content Builder, Automation Studio, Data Extensions, SQL, Segment. Software engineering: TypeScript, Node.js, Go, AWS (Lambda, SQS, EventBridge), RabbitMQ, Docker, Terraform, React, Next.js.
Is he available for freelance or contract work?
Yes. Guilherme takes freelance and contract projects in AI development and Salesforce Marketing Cloud. Reach him through LinkedIn or GitHub, both linked in the footer of every page.