I led the migration from legacy Node.js Lambdas to a new Python and GraphQL gateway, closing the performance gaps in checkout.
- 41% faster at p95
- 18% fewer abandoned carts
Senior AI-Native Engineer
Leonardo Muzi
I build with AI, and I build AI into products.
Barcelos, Portugal · Remote
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Hello
I’ve been shipping technology products since 2018. Always remote.
Full-stack by background. These days, AI is part of almost everything I build.
I speak Portuguese, English, French, and a little Spanish.
What I do
-
Deploying AI-powered products
MCP servers and RAG pipelines, running in production.
-
Focused agentic automation
Agents with one clear job, taking repetitive work off the team.
-
Engineering product ownership
From the first idea to production, and the alerts after.
A few numbers from my current role
- −41%
- checkout latency at p95
- −18%
- abandoned carts
- +7%
- conversion, quarter over quarter
- 3M
- monthly sessions on a storefront I built
- <4 min
- to spot a production issue, down from 15
- 1h+
- saved weekly per developer, through automation workflows and AI-powered tools
Story 01
Faster checkout
Story 02
AI in production
-
MCP servers
Connect Claude and OpenAI to our own systems, for customers and the back office.
-
RAG pipelines
Indexed incrementally, so answers keep up with new data. Qdrant and Langfuse.
-
An onboarding agent
Onboards products to third-party platforms. Developers get 1h+ back a week, QA 5+ minutes a session.
Story 03
Leading releases
Teams of five, with about ten tickets moving at once. I lay the foundations first, then split the work and keep it on track.
- 2 weeks early, on average
- Confirmed by automated checks after deploy
How I work
- I like owning things from start to finish.
- Small steps, shipped often, easy to roll back.
- Async first, with decisions written down.
- Happy to lead, review and pair when it helps.
How I got here
- 2014
Computer Engineering
UERJ, Rio de Janeiro. Final project published.
- 2018
Freelance
Online stores, mostly.
- 2020
Big Data Analytics
Postgrad at Georgian College, Canada.
- 2020
Remote teams
Juridoc, Gordian, CliqueiMudei, Feefo.
- 2022
Senior Full-Stack Engineer
Tech LLC. Storefront, checkout, observability.
- 2024
Senior AI-Native Engineer
Same company. AI in the product and in how we build.
Tools I reach for
- AI
- Coding agents, Claude, OpenAI, MCP, RAG, Qdrant, Langfuse
- Backend
- Python, Django, FastAPI, Node.js, GraphQL, PostgreSQL
- Frontend
- TypeScript, React, Next.js, Tailwind
- Cloud
- AWS, Kubernetes, Docker, Sentry, CI/CD
What I’m looking for
- Senior AI or product engineering work.
- Fully remote, with a team that trusts its engineers.
- A product with real users, where results show up in numbers.
- Room to grow, with real opportunities inside the company.