- Team lead of a 5 member team responsible for building a delivery driver mobile application that drastically reduced failure and driver defect rates- Built API from the ground up using Node.js and NestJS to be consumed by mobile app, authentication using access and refresh tokens (JWT)- Core member of the team that designed and implemented a modular monolith architecture to streamline development, using domain driven concepts- Active contributor of the company planning process, providing estimations and feasibility analysis- Designed solution for async image upload using S3 and Lambda (Node.js)- Built multiple Temporal Workflows to handle long lasting processes- Other responsibilities included: RFC writing, technical documentation, mentoring junior engineers through pairing sessions and review cycles- Stack: Python, Flask, FastAPI, SQLAlchemy, Node.js, NestJS, Typescript, React, React Native, PostgreSQL, Redis, Kafka, Protocol Buffers, Temporal Workflows, Datadog, Gitlab, Sentry, Jira, AWS, Lambda, S3

- Outsourced to Procore Technologies, working as a full stack engineer on an agile team with 10+ members. Monolithic backend using Ruby on Rails and PostgreSQL. - Part of the team that developed a workflow solution that integrated with Procore’s existing SaaS tools, providing users with a UI to visually create workflows, including steps, gateways, and behaviors.- Frontend in React, hooks + typescript, custom design system, react-query and other cutting edge technologies.

Developed tailored solutions to multiple companies. My main tasks would include talking with clients about their needs, proposing solutions and doing actual implementation, including:- Mobile Game Backend for Asantee Games using Ruby on Rails and MongoDB. Included a web-based administration tool.- Developed a hi-performance tracking vehicles solution (TCP/UDP) using Node.js, MongoDB and Redis that improved key metrics like: uptime over 99%, able to track thousands of vehicles with error rates below 0.5%. Including an administration tool built with React and websockets, allowing real time monitoring of vehicles using Google Maps.- Developed a authentication gateway using IdentityServer (OAuth, OpenID) and .NET C#.- Event Report app in React Native and backend in .NET C#.- Electron (Node.js) based app allowing access to hardware, including a small lib in C++ to access a fingerprint reader.

- Worked on a solution for cities and states registers, mainly developed using PHP and AngularJS. This solution included a REST API that was consumed by a third party app.- Realized many third party integrations using Node.js and Java.- Developed a monitoring tool with Ruby on Rails, Sidekiq and PostgreSQL.

- Worked on a document archive solution that included scanning, OCR, Elasticsearch-based indexing, and digital signing, primarily serving government clients.- Contributed to both the original version built in PHP and a newer version developed in Ruby on Rails, ensuring seamless integration of new features and optimizations.- PostgreSQL was our primary data storage, with Elasticsearch for text indexing.- Projects using Java and Node.js to provide access to hardware elements, like scanner and USB token certificates.

The company was focused on solutions for public security, I worked on several projects, including:- Virtual Police Station developed using Java and Adobe Flex, with SQL Server as the primary database.- A Police Dispatch Center, backend was in .NET C#, leveraging SQL Server for data storage and WebSockets for real-time updates, Redis for pub/sub. Early use of AngularJS and jQuery to have a more dynamic user experience.- Mobile Traffic Fines app, mainly creating a .NET C# backend that was used by the app through a REST API. Integration with local traffic departments and this solution was certified by DENATRAN (Brazil's national traffic department).- Developed some SOAP APIs (WCF) used across several solutions.

- Developed and maintained an animal health control software using .NET WebForms and C#.- Designed and implemented forms for managing vaccination schedules, animal counts, and herd-related data.- Collaborated closely with the product team to gather requirements and discuss feature improvements.- Utilized SQL Server as the primary database for storing and querying animal health records.

- Contributed to the development of a web-based health insurance management system using Java and JavaScript.- Designed and implemented forms with Java, utilizing Struts 2 and Hibernate, PostgreSQL for database management and jQuery for a more dynamic user experience.- Collaborated with a team to ensure code quality and maintainability.