AI Weather Forecasting
An API that estimates the weather for a Brazilian city on a chosen date, based on historical INMET data, using FastAPI and LangChain on the back end.
- Python
- FastAPI
- LangChain
- OpenAI
- Supabase
Software DeveloperSão Paulo, Brazil
From operations to code.
I started my career in logistics, transitioned into data analysis, and now build the systems that move the operation.
About
I did not move into tech from the outside. I started my career as a transport intern, learned the operation from the people running it, and drifted toward code as I realised how much of it could be automated.
As a data analyst I spent two years building logistics cost indicators and automations in Python and SQL. One of them became a messaging system that reaches over a thousand customers a day. That is where programming stopped being a tool and became the job.
Today, I work as a developer, building APIs and management systems using Java, interfaces with Angular, and integrations between internal systems, ERPs, and external services. My previous experience in operations continues to be a key strength: before thinking about how to write the code, I try to understand the problem it needs to solve.
Stack
What I work with day to day, grouped by where it applies.
- Backend
- JavaSpring BootSpring Data JPAHibernateJakarta EEJSFMavenGo
- Frontend
- AngularReactTypeScriptNative FederationJavaScriptHTMLCSSNext.js
- Data & BI
- OracleSnowflakeSupabaseSQLPower BIExcelVBA
- Python
- PythonFastAPIFlaskPandasLangChainGenAI
- AI
- Claude EcossytemCodexCursor
- Process
- GitScrumKanban
Projects
Projects with their own repository and demo, outside the Cassol experience.
Experience
Cassol Centerlar
Jun 2022 — present
Full-Stack Developer Current
May 2025 — present
- Full-stack development on Cassol Centerlar’s ERP. I work on both sides of the platform: the legacy Java monolith and the move to a new architecture built on micro-frontends and microservices.
- Legacy ERP (Java EE on WildFly, Oracle): a layered monolith with JSF/PrimeFaces screens, a Business/DAO layer and JPA/Hibernate mappings; a JAX-RS REST API that the new front ends use for login, branches, configuration and contracts.
- New platform (Cassol Hub): Angular 21 micro-frontends (standalone, zoneless, OnPush) joined by Native Federation under a shell that handles login, layout and menus; a shared design system published as an internal npm library for components and auth guards; Identity and access management on Keycloak; Spring Boot microservices taking over modules from the monolith while sharing its Oracle database.
- Spec-driven development with OpenSpec, and AI-assisted coding with Claude Code for planning, implementation and code review, with a QA approval step before every merge.
- Java
- Spring Boot
- Jakarta EE
- Go
- Angular
- TypeScript
- Python
- FastAPI
- Oracle
Data Analyst
Apr 2023 — May 2025
- Developed and monitored KPIs focused on logistics and delivery costs using Excel and Power BI to support strategic decision-making, cost reduction, and service level improvement.
- Created and optimized SQL queries to extract, manipulate, and analyze large datasets, ensuring fast and accurate reporting through dashboards and management reports.
- Automated processes with Python to validate delivery data and communicate with customers, reducing returns and lowering logistics costs while enhancing service levels.
- Implemented a messaging system to send satisfaction surveys based on the NPS model, reaching over 1,000 customers per day with minimal costs.
- Built custom Excel tools integrated with SQL and VBA to streamline data from multiple platforms, automating operational tasks and enabling faster, more accessible analytics for the team.
- Provided technical mentoring to new team members by sharing knowledge in SQL, Excel, business rules, and app development, accelerating onboarding and improving team productivity.
- Python
- Pandas
- SQL
- Oracle
- Power BI
- Excel
- VBA
Transport Intern
Jun 2022 — Apr 2023
- Supported logistics operations by managing data and creating preliminary reports.
- Gained hands-on experience in analyzing transportation and logistics data, strengthening foundational skills in business intelligence and operations.
- Excel
- SQL
Other work
Full-Stack Developer Current
Ita Calçados
Sep 2026 — present
- End-to-end development of Ita Calçados’ e-commerce platform for clothing and footwear, from architecture to the production launch. It has an async Python/FastAPI backend (SQLAlchemy, Pydantic v2) on PostgreSQL/Supabase, and a React 18 + TypeScript storefront and admin panel.
- Checkout and payments built on the AppMax gateway: credit card with configurable installments, Pix, and antifraud review handling; payment-state rules that keep a customer from being charged twice; atomic stock reservation under concurrent purchases.
- Delivery options: Correios shipping quotes, and in-store pickup scheduling calculated from the store’s opening hours and time zone.
- An admin area with access control by module, covering: orders and invoices; a product catalog with images per color; coupons and an influencer program; shipping, checkout and site settings; a sales dashboard.
- Performance and reliability: Redis caching, CDN caching with a purge on every admin save, serverless deployment on Vercel, structured logging, and load tests of the full customer journey.
- Security and compliance: database hardening (Row-Level Security, Data API locked down); versioned privacy-policy consent under the LGPD; every schema change shipped with backup and rollback scripts for production.
- SEO through server-rendered product pages and a dynamic sitemap.
- Quality assurance with automated tests: Pytest unit tests, plus integration tests against a real PostgreSQL database (about 95% backend coverage); Vitest/MSW for the frontend and Playwright for end-to-end tests.
- Spec-driven development with OpenSpec, and AI-assisted coding with Claude Code for planning, implementation and code review, with a QA approval step before every release.
- Python
- FastAPI
- React
- Supabase
QA Tester (freelance)
Vetto AI
Mar 2026 — Jun 2026
- My primary responsibility involves analyzing AI-driven conversations based on predefined personas and contextual scenarios. I assess whether the AI responses are accurate, coherent, and aligned with the user’s intent, while also verifying the model’s ability to properly interpret and adapt to different personas.
- LLM
- QA
Web Developer
Freelance
Dec 2024
- I delivered a Next.js web application: login authenticated against the client’s API, an interactive table report, and Excel export.
- Next.js
- JavaScript
- HTML
- CSS
Contact
Open to conversations about opportunities and projects.