Today I am an AI Product Engineer
- FullStack Dev
- QA Analyst
- TechLead
What I can build for you
Closed-scope projects, contracts and consulting. Every offer below comes from work I've already delivered.
AI products and agents, in production
From an idea or a first prototype all the way to production: agents that work together with human review, WhatsApp agents, RAG knowledge bases, agent evaluation and usage-based billing.
- Construction-planning agents for large projects, in production: a root agent with a methodology specialist (Lean Construction, Advanced Work Packaging, PMBOK) and human review where the numbers matter
- A construction planner that began as an n8n automation and became a product in the platform's plans
- A multi-tenant platform of customer-service agents on WhatsApp, built for a regulated market
- and many more
- AI agents
- RAG
- Evals
From MVP to a product that scales
I turn MVPs and existing systems into software a team can maintain and grow: monorepo, multi-tenancy, CI/CD, infrastructure as code and cloud architecture.
- Five MVPs built with Lovable brought into one monorepo, with row-level security and Terraform on GCP
- A warehouse system, from triage to shipping, in production
- A live shopping platform moved from a single server to ECS, with blue-green deployments and infrastructure as code
- and many more
- Architecture
- CI/CD
- Infrastructure as code
Quality without slowing delivery
Test strategy and automation, feature flags and observability, and a QA function that stays with the team after I leave.
- Open defects down from about 300 to under 100, together with engineering
- Monitoring and proactive alerts that catch failures before customers have to report them
- and many more
- E2E testing
- Feature flags
- Observability
Technical leadership and team training
Leading a team from the problem to the delivery: requirements, cadence and deadlines, hiring, and training people until the team runs on its own.
- Designed the hiring process and coordinated a team of five developers
- Trained the team in new quality practices, and the QA who took over my role
- Mentored a junior developer and handed over with the team trained and operating procedures in place
- Led an international project in English, setting cadence and deadlines between the client and the developers
- and many more
- Tech leadership
- Mentoring
- Hiring
- Belo Horizonte, Brazil
- Remote for Brazil and abroad, or hybrid in BH
- Portuguese and English
- Closed-scope projects, contracts or consulting
A bit of what I've delivered
AI customer service on WhatsApp, in a regulated market
Tech Lead and Full-Stack Engineer
- Designed and built a multi-tenant platform of AI agents, with RAG, an agent evaluation tool and token-based billing, and mapped every requirement of the sector's regulation to the code.
- Set up CI/CD with unit, integration and E2E tests, led a team of five and handed over with the first clients live and the team trained.
A construction-tech platform
QA Manager and Tech Lead
- Joined as QA and went on to lead a team of five developers; ran hiring and trained the QA who took over the role.
- Feature flags and Datadog RUM brought open defects from about 300 to under 100.
- Led the construction-planning agents, from an n8n automation to products still in production.
Device trade-in and asset management
Technical Consultant and Tech Lead
- Brought five Lovable-built MVPs into a single React/TypeScript monorepo, with multi-tenancy through PostgreSQL row-level security, CI/CD and Terraform on GCP.
- Put the warehouse system into production and set up a harness so the owner could keep building with AI and still reach production.
A software house: live shopping for high-end fashion and a live-music platform
QA Engineer, then Tech Lead
- Led engineering across three products, in English, between the client, the international team and the Brazilian developers.
- Designed the AWS infrastructure, the move to services and the international delivery integrations; built a React front end and an AI agent that researches each musician and suggests goals for the profile.
Before tech, I spent ten years running my own businesses and a language school's finances. That's where my eye for product, cost and priority comes from. Read the full story
Some of my stack
- Languages
- TypeScript
- JavaScript
- Node.js
- Python
- SQL
- and many more
- Front end and mobile
- React
- React Native
- Expo
- Tailwind
- Vite
- and many more
- Back end and data
- PostgreSQL
- pgvector
- Prisma
- Express
- Laravel
- and many more
- Applied AI
- RAG and embeddings
- LangChain and LangGraph
- OpenAI and Anthropic SDKs
- n8n
- Agent evaluation
- and many more
- Cloud and DevOps
- AWS
- GCP
- Terraform
- Docker
- GitHub Actions
- and many more
- Quality and observability
- Playwright
- Cypress
- Vitest
- Datadog
- Sentry
- and many more
Common questions
What can I hire Fael for?
Closed-scope projects are the best fit: taking an AI product to production, taking an MVP to a product that scales, setting up quality and delivery, or leading and training a team. Contracts and one-off consulting work too.
How is the work contracted?
Through HC Consultorias, my company, with a contract and an invoice. Other formats, let's talk.
Where from, and in which languages?
From Belo Horizonte, Brazil: remote for Brazil and abroad, or hybrid in BH. I work in Portuguese and English.
How do we start?
Send a message about what you want to build, through the form, email or WhatsApp below.
Or reach me directly