ABOUT

I'm a full-stack software engineer with more than five years of experience building backend services, APIs and web applications, mostly in Python. A big part of my career has been in fintech, on payment and financial systems at Fiserv, where getting the details right really matters. I work across the stack with Django, FastAPI, PostgreSQL, React and AWS, and lately I've been spending much of my time on integrations, automations and applications with LLMs and AI agents that take repetitive, manual work off people's plates. I take part in the whole cycle: turning loose requirements into software with the product team, implementing, testing, following it in production and keeping it simple to evolve. Alongside that, MilWeb is my independent studio, where I build websites, systems and web experiences end to end.

ENGINEERING IN PRACTICE

Backend & APIsAI & automationsInterfaces & motion

REST API + AGRIBUSINESS E-COMMERCE PLATFORM

Kavita PlatformPrototype · demo

Problem

An agribusiness needed more than a store: sales, payment, deliveries and role-based management (admin, customer, broker and producer) in a single platform.

My contribution

Layered REST API (route, controller, service, repository) with per-context authentication, uploads, Mercado Pago payments, Swagger docs and 199 test files in Jest and Supertest; the Next.js frontend lives in its own repository and only talks to the API over HTTP.

Technical decision

Four independent authentication contexts (admin, customer, broker and producer), each with its own HttpOnly cookie, middleware and login, coexisting in the same browser; data access through a raw mysql2 pool, with Sequelize restricted to the migrations CLI.

Technologies

Node.js · Express · MySQL · Zod · JWT · Redis · Jest · Supertest · Swagger · Docker

CODE · BACKEND↗ · opens in a new tabCODE · FRONTEND↗ · opens in a new tabCASE ON MILWEB→No public demo

TECHNICAL DETAILS

Confirmed in the code

199 test files (150 unit, 49 integration) in Jest and Supertest, routes split by context (admin, public, corretoraPanel), Swagger, Helmet, Redis-backed rate limiting, Mercado Pago, CI/CD and a Dockerfile.

According to the README

Single API response contract, standardised error handling, dual HttpOnly-cookie authentication and electronic contract signing through ClickSign with an HMAC-validated webhook.

CRM AND OPERATIONS · OWN PRODUCT

MilLeadDelivered · in use

Problem

Prospecting and running the studio was manual: finding businesses with weak websites, assessing each one, writing every outreach, closing contracts and tracking projects in spreadsheets.

My contribution

The CRM's AI layer: lead scoring with the rationale logged to the timeline, an executive report and per-channel message drafts, all built from the lead's real context (company, latest site audit, recent activity). Plus the automations as Postgres-backed queues: site audits, briefings, contract PDFs and post-sale.

Technical decision

AI is a domain port (LeadAi) with two adapters, Anthropic and any OpenAI-compatible API, and it starts switched off when no key is set: the CRM works fully without it, and changing models is configuration, not code.

Technologies

Node.js · Express · TypeScript · PostgreSQL · Prisma · pg-boss · Anthropic SDK · Zod

CODE↗ · opens in a new tabNo public demo

TECHNICAL DETAILS

Confirmed in the code

Clean Architecture in the API (domain, application, infrastructure and interfaces), Prisma migrations, pg-boss queues for audits, briefings, contracts and post-sale, an AI service with lead scoring, executive report and message drafts (Anthropic and OpenAI-compatible adapters, off without a key), Zod, Helmet, JWT, pdf-lib and three CI workflows.

According to the README

Website audits in six categories, AI lead scoring and drafts, contracts with electronic signature, post-closing automation and multi-tenancy with RLS.

CREATIVE DEVELOPMENT · THIS WEBSITE

MilWeb OSLive

Problem

Present the studio and its work as an experience of its own — an operating system with windows, apps and a living eye — without giving up shareable routes, three languages, SEO and accessibility.

My contribution

A Zustand window manager where the URL drives focus, the phone as a launcher with its own history, a 2.5D eye in GLSL with two themes, a loading screen tied to real readiness and the Playwright suite that validates all of it, with 400+ checks.

Technical decision

The eye is an analytic fragment shader (sphere, refracted iris, curve-based eyelids) instead of a 3D mesh: no heavy dependency, the static fallback image is rendered by the same shader, and the theme switch happens while the eyelid is shut.

Technologies

Next.js 15 · React 19 · TypeScript · Zustand · WebGL · GLSL · GSAP · Playwright

CODE↗ · opens in a new tabDEMO↗ · opens in a new tab

TECHNICAL DETAILS

Confirmed in the code

All in this repository: the shader in features/os/eye, the store in features/os/store.ts, localised routes in i18n/routing.ts and the suite in scripts/os-check.mjs.

According to the README

Design decisions are documented in docs/milweb-os-references.md.

EXPERIENCE

1. 03/2025 – presentBellevue, Washington, US · remote

   SmartSheetSenior Full Stack Engineer

   • Build and maintain full-stack applications using Python, FastAPI, React, and TypeScript.
   • Develop AI-powered features and agent workflows that connect LLMs with APIs, application services, and internal tools.
   • Build backend services and REST APIs supporting customer-facing products and internal platforms.
   • Design PostgreSQL data models and application services with a focus on reliability and maintainability.
   • Integrate external APIs, AI services, and business workflows into production applications.
   • Improve application quality through automated testing, code reviews, monitoring, and CI/CD workflows.
2. 05/2022 – 02/2025São Paulo, SP, Brazil

   FiservSenior Software Engineer

   • Developed Python backend services and REST APIs for financial technology and payment-related applications.
   • Built AI-assisted workflows and agent-based services to automate repetitive business processes and connect LLMs with internal APIs and application data.
   • Designed and maintained PostgreSQL data models, queries, and integrations supporting financial application workflows.
   • Implemented automated testing and CI/CD workflows to improve software quality and release processes.
   • Collaborated with engineering and product teams to troubleshoot production issues and deliver scalable application features.
3. 05/2020 – 04/2022São Paulo, SP, Brazil

   GoWorksSoftware Engineer

   • Developed web applications and backend services using Python, Django, REST APIs, and SQL.
   • Built application features from requirements through implementation, testing, and deployment.
   • Designed PostgreSQL data models and integrations with third-party services.
   • Used Docker, Git, and CI/CD workflows to support consistent development and deployment environments.
4. alongside my careerBrazil · remoteIndependent work

   MilWebFounder and developer

   • One-person development studio: websites, systems and web experiences for companies in Brazil, from briefing to deploy, with a contract and post-launch support.
   • Own products in TypeScript — MilLead (the studio's CRM), InkVision and Milsaca (multi-tenant SaaS) — plus studio projects with WebGL and 3D.

SKILLS

EDUCATION

• 08/2017 – 12/2021Bachelor of Science in Computer ScienceUniversity of São Paulo