About me

Software Developer

Software Developer with experience building business platforms, operational systems and AI-powered products.

Throughout my career I have worked across frontend, backend and product engineering, helping companies design and deliver software that supports real business operations.

My experience includes financial systems, WhatsApp automation, AI integrations, livestock management platforms and SaaS products.

Beyond implementation, I frequently work on system architecture, API design, technical documentation and platform maintainability.

Engineering Highlights: Built a complete livestock management platform, Designed API contracts and technical documentation, Developed AI-powered WhatsApp automation systems, Implemented payment integrations with Stripe, Created ETL processes and data migration pipelines, Delivered Progressive Web Apps for offline-first usage & Worked across frontend, backend and platform engineering.

Skills and expertise

Languages: Javascript / Typescript & Python

Frontend: Next.js, Vite & React.js

Backend: Node.js, Bun.js, Express, Fastify, Elysia.js, Go Lang & Nest.js

Database: Prisma, Hasura, Firebase, Supabase, MySQL, PostgreSQL & SQLite

Architecture & Engineering: REST APIs, System Design, Clean Architecture, DDD, Technical Documentation & ETL Pipelines

Testing: Node:test, Bun:test, Storybook & Jest

DevOps: Docker, Vercel, CI/CD & Github Actions

Design: Figma, Adobe XD, Photoshop & UX/UI

Other: Git, Serverless, Google Cloud, Docusaurus, etc...

Career

Personal projects or those involving self-development will be listed on Linkedin or GitHub.

Software Developer, Coach, Teacher & Administrative Coordinator @ Campinas Fighters | Jan 2024 - Actually

Software Developer – responsible for the team's projects and applications, including athlete registration systems, social campaign dashboards, prize draw systems, and student management systems; also responsible for website development in compliance with the Municipal Government's standards for transparency portals. Since February 2024.

Affiliated with FETESP (São Paulo State Taekwondo Federation); re-certified as a black belt and official coach for Campinas Fighters as of July 2026 (https://www.instagram.com/p/DavBGwplVFE).

Coach - teaching Taekwondo classes and assisting with social initiatives such as the "Projeto Escola" (School Project). Since July 2026 (FETESP).

Designer – Responsible for creating flyers, leaflets, and competition team uniforms (https://be.net/yagasaki). Since February 2024.

Administrative Coordinator - by Campinas Fighters under the "Projeto Escola" initiative, responsible for financial reporting and other administrative functions for the team. Since August 2026.

The entire team and its projects operate in partnership with the Campinas Municipal Government, the Department of Education, and the Department of Sports.

Using Next.js, Javascript, Typescript, Firebase, Tailwind and Discord Webhook.

Software Developer II @ R2A Cobrança Pecuária | Dec 2025 - Mar 2026

Led the end-to-end development of MeuBoi, a livestock management platform centralizing cattle registration, genealogy tracking, financial operations, and herd management workflows.

Architected and implemented backend and frontend services using Go, TypeScript, Next.js, and Supabase, supporting large-scale operational workloads across animal records, transactions, ownership structures, and financial data.

Designed Progressive Web App (PWA) capabilities and real-time analytics dashboards, enabling offline-first access and reliable field operations in regions with limited connectivity.

Developed API contracts, technical documentation, ETL processes, and system architecture standards using Swagger and Docusaurus, improving maintainability, onboarding efficiency, and long-term scalability.

Coordinated feature delivery, technical planning, and development workflows using Scrum methodologies and GitHub Projects, ensuring predictable execution of business-critical features.

Go • TypeScript • Next.js • Supabase • PostgreSQL • Python • PWA • Swagger • Docusaurus • Discord Webhooks

High-Performance Coach @ Campinas Fighters | Jan 2024 - Actually

As a coach for Campinas Fighters, I was responsible for managing the athletes and personnel, as well as providing guidance to parents and guardians regarding the sport.

As a black belt, in addition to ensuring a high technical standard, I was responsible for the athletes' physical and psychological well-being before, during, and after national events and championships.

Software Developer II @ Astriia | Sep 2024 - May 2025

Designed and developed AI-powered customer interaction workflows integrating OpenAI and WhatsApp Business APIs, delivering personalized experiences at scale.

Built backend services and automation pipelines responsible for conversational AI, customer engagement, subscription management, and operational process automation.

Implemented Stripe-based payment flows that increased annual subscription conversions by 28% and contributed to a 35% reduction in execution time of core internal processes.

Developed customer feedback and analytics systems that improved user satisfaction by 40% while providing actionable business insights.

Node.js • Express • Next.js • OpenAI API • WhatsApp Business API • Stripe • Python • Discord Webhooks • Facebook Business API

Software Developer II @ WhatsUpper | Aug 2023 - Dec 2023

Specialized in developing and integrating intelligent automation solutions for the WhatsApp Business API, enhancing customer communication workflows.

Built and maintained scalable backend services using Node.js to process high volumes of messages and power interactive chatbot experiences.

Collaborated with cross-functional teams to design and implement custom features, focusing on improving user engagement and retention through the WhatsApp channel.

Using Rocket.chat, Firebase, Next.js, WhatsApp API, Facebook Business API, Twilio and Firebase

Software Developer II @ Stone | Oct 2022 - Jul 2023

Optimized DialogFlow routines and integrated them with Rocket.Chat, improving chatbot response speed by over 50% and increasing customer retention.

Developed an interactive SPA with jQuery to automate customer routing and enable WhatsApp-based checkouts, cutting down queue times by up to 20%.

Authored comprehensive documentation for system architectures and internal processes, ensuring scalability and simplifying future maintenance.

Using Rocket.chat, Hasura, Next.js, WhatsApp API, Facebook Business API, Twilio, Firebase, DialogFlow and Google Cloud Plataform

High-Performance Athlete @ Cenário Capital | Feb 2021 - Feb 2024

The Campinas Fighters Sports Training Association (Associação Campineira de Formação ao Esporte) is a Civil Society Organization (CSO) founded on October 15, 2021, and based in the city of Campinas, in the interior of São Paulo state. Its objective is to promote the practice of Taekwondo as a tool for transforming lives—particularly those of socially vulnerable youth—in accordance with its bylaws. (See more in https://campinasfighters.org.br/)

As an athlete with Campinas Fighters, I secured several titles during my career—albeit a late-starting one—including Taekwondo Copa América Champion (2022), two-time São Paulo State Champion (2023), and São Roque International Champion (2023). I officially became a black belt with the team in December 2023 and a coach in January 2024.

Systems Development Analyst I/II @ Cenário Capital | Oct 2020 - Sep 2021

Developed and maintained critical financial systems, contributing to data analysis and process automation to support investment strategies.

Collaborated with analysts and stakeholders to gather requirements and translate them into functional software solutions, improving operational efficiency through web quiz.

Progressed from a Junior to a Mid-level role by demonstrating strong technical skills in system design, database management, and backend development.

Using jQuery, HTML, CSS, Javascript, React, HTML for Email Marketing and Next.js

Front-end Developer I / Jr. Marketing @ Marry Perry | Feb 2020 - Sep 2020

Developed and enhanced the user interface (UI) of the e-commerce platform, focusing on creating a responsive and intuitive shopping experience.

Implemented front-end features and optimizations that contributed to improved user engagement and conversion rates.

Assisted the marketing team with technical tasks, including landing page creation, email template coding, tracking analytics and afiliates system.

Using HTML, CSS, Javascript, Node.js, Express, MySQL and Python.

Soldier @ Brazilian Army | Mar 2016 - Apr 2017

Developed strong discipline, resilience, and the ability to perform effectively in high-pressure, structured environments.

Mastered teamwork and communication skills through collaborative daily operations and mission-critical exercises with a diverse team.

Demonstrated a high degree of responsibility and commitment while managing assigned communication equipment and executing duties with precision.

Certificates

Introduction to automation with n8n by Rocketseat - May 2026

Introduction to AWS by Rocketseat - May 2026

Introduction to Go Lang by Rocketseat - May 2026

React by Gustavo Sales in Rocketseat - November 2025

React Fundamentals by Gustavo Sales in Rocketseat - November 2025

Introduction to automation with n8n by Enzzo Panarotto in Rocketseat - September 2025

NestJS by Jornada do Dev - April 2025

Technical Leadership (Tech Lead) by Sérgio Fiorotti in Rocketseat - February 2025

How to build a Micro SasS with Next.js, Firebase, Google Analytics and Stripe by Rocketseat - January 2025

Build a web API with Node.js and Express by Microsoft Ignite - November 2024

NLW Journey - GO by Rocketseat - July 2024

NLW Journey - NodeJS by Rocketseat - July 2024

NLW Journey - Java by Rocketseat - July 2024

NLW Journey - Python by Rocketseat - July 2024

NLW Journey - React (Tailwind, React) by Rocketseat - July 2024

Web Development with Python: Python, Django, Pytest & OOP by IBM SkillsBuild - June 2024

Firebase: Realtime Database, Cloud, Auth and Security by Gabriel Barreto - May 2024

NLW Unite (Node, Typescript, Fastify, Prisma, Zod & Swagger) by Rocketseat - April 2024

NLW Unite (React, Vite, TypeScript, Styled Components, Unicons & Dayjs) by Rocketseat - April 2024

NLW Expert (Node, TS, Fastify, Prisma, Docker, PostgreSQL, Redis, Zod & WebSocket) by Rocketseat - February 2024

NLW Expert (React, TS, Vite, TailwindCSS, Web Storage & Web Speech) by Rocketseat - February 2024

[OFF] 1st Kyorugui Arbitration Seminar by Nova FETESP - February 2024

[OFF] 4th Kombat Taekwondo Referee Seminar by Kombat Taekwondo - January 2024

[OFF] Black Belt Club by Campinas Fighters - December 2023

TDD – Guided Software Development Tests by Instituto Tecnológico de Aeronáutica (Coursera Free) - December 2023

Complete Dialogflow - Master the Creation of Virtual Assistants by Universidade Global, Rogerio Guimaraes - November 2023

Modern Web with Projects (JS/Typescript/React/Node) by COD3R - August 2022

Workshop Figma by Design Culture - April 2022

Introduction and Complete Course in Computer Science by Harvard - March 2022

Participation, Proud Tech by Softplan - March 2022

Agile Days by Instituto de Gestão e Tecnologia da Informação (IGTI) - November 2021

Participation, Masterclass Github Actions by Azure na Prática - January 2021

Participation, Hackathon (Third Place) by Shawee, AMBEV Hackathon - December 2020

Linux Terminal by Profº Diego Mariano - October 2020

Introduction to the Linux Operation System by Profº Diego Mariano - October 2020

Introduction to MySQL Database by Profº Diego Mariano - October 2020

Creating Dynamic Web Pages with PHP by Profº Diego Mariano - October 2020

Facebook Blueprint - Basic to Advanced by Faculdade do Marketing Digital - July 2020

11th Edition - Omnistack Week by Rocketseat - March 2020

Introduction to Git and Version Control by Digital Innovation One - February 2020

Getting Started with Git and Your Commands by Digital Innovation One - February 2020

Arctic Code Vault Contributor by Github Archive Program - February 2020

Essential Programming Logic by Digital Innovation One - February 2020

Internet programming with HTML5 and CSS3 by Digital Innovation One - February 2020

Web Programming for Scientific Dissemination by Profº Diego Mariano - January 2020

Web Design with PHP, HTML, CSS and JS by Udemy - January 2020

Illustration and Graphic Design for the Web by Bradesco - May 2017

Web Design and Graphic Design by MacPoli Cursos - December 2014