PTEN
Open to opportunities

AI agents in production.

I build tool-using agents, MCP servers and integrations in TypeScript and Python, and run them safely in production. CTO & Co-Founder at DockPlus AI.

View ProjectsLet's Talk
Profilegk.yml
Portrait of Gustavo Karsten
Gustavo KarstenAI Agent Engineer
Role
AI Agent Engineer
Company
CTO & Co-Founder · DockPlus AI
Location
Santa Catarina, Brazil
Work mode
Remote or hybrid in SC
Languages
Portuguese, English, Spanish
In IT since
2005
66agent toolsLedgerJob · 16 require human confirmationSOURCE LedgerJob codebase · Oct 14, 2026
74towns collectedCape Cod Permits · 147,639 recordsSOURCE Cape Cod Permits MCP · Oct 14, 2026
53,997active auction lotsAchado de Leilão · 22 sourcesSOURCE Achado de Leilão MCP · Oct 14, 2026
2005started in ITLinux infrastructure before AISOURCE résumé

Featured project

AI Agent + MCP

U1 · Core

LedgerJob

Multi-tenant SaaS for US construction contractors covering leads, quotes, projects, invoices and scheduling. Owners run the business by chatting with an AI agent, and the same tools are exposed through an MCP server.

  • 66 agent tools, all also exposed over MCP; 16 require human confirmation.
  • Backend with 46 domain modules and 87 Prisma models.
  • 59 backend test files (Vitest) with 347 declared test cases.
Node.jsTypeScriptExpressPrismaPostgreSQLReact
16actions require human confirmationSOURCE LedgerJob codebase · Oct 14, 2026
Demo · human confirmation
  1. agent asks: email the quote
  2. waiting for confirmationConfirm
  3. executed
View Full Case Study

Projects

From the production agent to the study lab.

U1
LedgerJob
liveU2
Cape Cod Permits
privateU3
Achado de Leilão
liveU4
DockPlus Atendimento — multichannel customer service agent
privateU5
Reachant
liveU6
NutriApp
liveU7
DockPlus AI Client Websites
liveU8
AgentLab — agent architecture lab
open sourceU9
Video lesson RAG
privateU10
IRS Helper — RAG over US tax documents
private
View all projects

Core Stack

What I use in production projects.

AI Agents
  • OpenAI
  • Claude
  • MCP
  • LangGraph
  • Langfuse
Backend
  • TypeScript
  • Node.js
  • Python
  • FastAPI
  • Fastify
Data
  • PostgreSQL
  • pgvector
  • Prisma
  • Redis
  • Playwright
Infrastructure
  • Docker
  • Dokploy
  • Linux
  • Cloudflare
  • Ansible

Contact

Direct contact, no form.

Let's Talk.

I'm looking for roles in AI agent engineering, integrations and AI-backed Node.js or Python backends. Remote, or hybrid in Santa Catarina, Brazil. I reply within 48 hours.

gustavo.karsten@outlook.comView contact details