Internal processes01
AI in internal processes
We pick a process with real volume and ship it to production with the evaluation criteria written down first.
main
11 years
building product
5 startups
from seed to series C
5 rounds
lived from the inside
Intelligent systems.Human decisions.
I am Matheus Poleza. I help founders and leadership teams turn product, engineering and AI challenges into systems that grow with the business.
Tell me your challenge →
Trusted by
Joinville, Brazil · remote
Services
What I do
Four ways to work with me. The first three are scoped engagements, the last one is full time.
Agents02
Agents in production
Evaluation and observability ship with the agent, so you find out it broke before your customer tells you.
delivery
Advisory03
Fractional CTO
Architecture, build or buy, a review of what is already running. Technical decisions without hiring a team first.
part-time
Product04
Product engineering
From discovery to code in production, inside your team. It is what I do full time at Jam.
full time
Results
Results I built
Each company caught me at a different stage. This is what stayed behind.
+30%
New ContaAzul checkout with full A/B measurement. Conversion went up by more than 30%.
Read more →30%
Creditas platform for affiliates and banking correspondents. It became the best acquisition channel in the company, with more than 30% end to end conversion.
Read more →Origin0 → 1
A financial wellness platform built from scratch. Product market fit validation, strategy, infrastructure and hiring the team.
Read more →100k
Requests a day at 99.9% uptime on the Voiceflow services I architected, alongside the framework that brought LLMs into the product.
JamMCP + CLI
Connecting Jam to agent workflows through MCP and the CLI.
+30%
New ContaAzul checkout with full A/B measurement. Conversion went up by more than 30%.
30%
Creditas platform for affiliates and banking correspondents. It became the best acquisition channel in the company, with more than 30% end to end conversion.
Origin0 → 1
A financial wellness platform built from scratch. Product market fit validation, strategy, infrastructure and hiring the team.
100k
Requests a day at 99.9% uptime on the Voiceflow services I architected, alongside the framework that brought LLMs into the product.
JamMCP + CLI
Connecting Jam to agent workflows through MCP and the CLI.
About me
I have been building product for eleven years
I work as a product engineer for American companies. What is already routine inside them takes a while to arrive here, and that gap is what I shorten for Brazilian companies.
Book a call ↗First paid commit
2014
I joined ContaAzul as an intern and was hired full time before the internship ended. Never stopped since.
ContaAzul, Creditas, Origin and Voiceflow. I went through five funding rounds from inside the engineering team, from Series A to Series C.
I spent the last four years building an agent platform at Voiceflow, before it became a market topic. Today I build product at Jam.
I also run Citou, where I test first what I later recommend.
Journey
Where I have been
Jam
May 2025 · present
Senior Software Engineer. A debugging tool used by engineering teams in the United States.
Voiceflow
2021 → 2025 · series A to series B
Senior Engineer and later Team Lead. Conversational agent platform, with LLM integration and the NLU system.
Origin
2019 → 2021 · first year to series A
Lead Frontend Engineer. I joined in the company first year and left one month before the US$ 56M Series B.
Creditas
2016 → 2019 · series B to series C
Senior Frontend Engineer and later Tech Lead. Affiliate platform, releases from days to hours.
ContaAzul
2014 → 2016 · series C
Intern and later Frontend Engineer. Checkout, design system and the testing culture of the team.