Welmo J.

Back-end and Systems Engineer

Tech Lead/ Senior Developer
6/1/2022 - Present

Led an international team of up to 6 developers, UX designers, and interns, driving collaboration and innovation throughout multi-faceted projects. Played a pivotal role in the MVP phase of a groundbreaking product, which transitioned from an internal tool into an innovative Recruitment SaaS platform. Demonstrated backend development expertise using Python and FastAPI, and led frontend development leveraging React and TypeScript.

Orchestrated a robust cloud infrastructure through AWS services, including Lambda for backend processing (later migrated to ECS), Amplify for frontend hosting, S3 for file storage, RDS for database management, and Cognito for user authentication. Leveraged Terraform for infrastructure as code (IaC) to efficiently establish and manage the AWS environment.

Championed AI integration by incorporating ChatGPT, conducting Prompt Engineering, and leading the development of a dynamic Neural Network to enhance candidate selection based on job descriptions. Engaged with stakeholders to comprehend their requirements, formulated a comprehensive roadmap, and crafted user stories to ensure alignment with business objectives.

Implemented and consistently advocated for Agile and Scrum methodologies within the team, organizing essential agile rituals such as sprint planning, refinement sessions, daily stand-ups, and retrospectives to enhance productivity and team cohesion.

Lead Programmer
8/1/2021 - 7/1/2022

Responsible for leading a team of six developers with a diverse skill set, coordinating the delivery of new features, bug fixes, and refactorings for a dynamic website. Primarily focused on backend development using Ruby on Rails, hosted on AWS, while integrating with a React-based frontend. Conducted meetings with clients and project managers to set priorities and provided training for developers on codebase and integrations with platforms including WordPress, WooCommerce, and Sendgrid. Implemented best development practices such as GitFlow, Merge Request, and thorough API documentation. Architected a backend solution for an internal app, ensuring smooth integration with the frontend. Collaborated closely with the UX/UI team and the client to design a user-friendly solution that met requirements and adhered to project timelines. Developed technical proficiency in managing a remote team, effectively coordinating via English for all communications.

Backend Developer
4/1/2021 - 7/1/2021

Developed proficiency in microservice architecture within the logistics development team, focusing on adding tests and features to services utilizing Python and Django on AWS. Configured CI/CD pipelines using GitLab, ensuring seamless integration and deployment processes. Contributed to the creation and development of a Backend-for-Frontend (BFF) service using NestJS for enhanced functionality with an internal tool.

Python | Django Developer
1/2/2020 - 4/1/2021

Developed features, refactored, and maintained a microservices application created with Django REST Framework, designed for controlling and automating air conditioners, lights, and batteries. Utilized REST APIs and WebSockets for device communication. Created and implemented new services using Python and Golang, including command line scripts for automation and server maintenance. Implemented continuous integration and continuous deployment (CI/CD) pipelines for the backend. Developed a WhatsApp Bot using Selenium to notify clients about the status of their devices.

Intern
5/2/2019 - 12/1/2019

Developed software for a wine tasting machine, creating the interface in Python utilizing the WxPython library on a Raspberry Pi and integrating functionalities with the machine's hardware. Conducted comprehensive software, hardware, and stress tests to ensure optimal performance and reliability. Assisted in developing the interface for a thermal camera system used in train equipment, gaining experience in hardware-software integration and enhancing technical proficiency in Python and related libraries.

Intern
8/2/2018 - 4/2/2019

Developed a rectifier bridge system for automating hydroelectric plants, utilizing an STM32 microcontroller programmed in C. Ensured the system met client specifications for control via internet, 4-20mA, and USB interfaces. Contributed to an IoT project involving the ESP8266, enhancing connectivity and automation capabilities. Demonstrated technical expertise in embedded systems, microcontroller programming, and network communication protocols.

Intern
1/2/2018 - 7/1/2018

Developed expertise in customer support and website customization, leveraging HTML5, CSS, and JavaScript. Gained experience in troubleshooting and resolving client issues, ensuring smooth user experiences. Excelled in customizing website layouts, optimizing performance, and implementing responsive design principles. Acquired strong problem-solving skills and the ability to communicate technical information effectively to non-technical users.

Intern
4/2/2015 - 4/1/2016

Developed projects leveraging embedded technology using Raspberry Pi and Arduino, including an electric cart with an integrated camera controllable via any computer, designed to engage the target audience of the course. Managed internal projects involving touch screen kiosks equipped with embedded computers, deployed in educational institutions and shopping malls for disseminating notices and information.

Electronic Engineering at Federal University of Technology - Paraná
2016 - 2022

Computer Engineering at Positive University
2014 - 2016