Marcelo Barros Email & Phone Number

Campo Grande, Ms, Br

Remote

- 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

Remote

- 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.

Campo Grande

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.

Campo Grande

- 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.

Campo Grande

- 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.

Campo Grande E Região, Brasil

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.

Campo Grande E Região, Brasil

- 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.

Campo Grande E Região, Brasil

- 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.

Bacharel Em Análise De Sistemas, Tecnologia Da Informação

Especialista Em Engenharia De Software, Tecnologia Da Informação

Software engineering course focused in the RUP (Rational Unified Process) and some agile processes. Through classes we would replicate.