Lucas Hemkemeier
Junior Back-end Developer · Joinville, Brazil
Back-end developer working with Python and Django. Since May 2026 I have been responsible for a production management system at a company in Araquari, from the data model to deployment. Systems Development technician (SENAI) and Software Engineering student at Católica SC. Currently studying Java and Spring Boot.
Projects
racha-api
REST API for sports court rentals: daily time-slot grid, booking several slots in a single transaction, orders, pagination and filters.
Django · PostgreSQL
noar-badge
Live status badge for READMEs and websites: it sends a GET to the app's health endpoint and shows whether it is up and how long it took to answer. Runs at the edge, with SSRF protection on every redirect.
TypeScript · Cloudflare Workers · Vitest
Tremzz
Web platform for railway operations management: routes, users and real-time communication with sensors over MQTT. Team project from the technical program at SENAI, where I was responsible for the data model, the back-end, the screens, the MQTT integration and the sensor assembly.
PHP · MySQL · JavaScript · MQTT
Open source
folio
15 merged pull requests to folio, which generates a portfolio and résumé from a GitHub profile: features, test coverage, CI setup, error handling, security fixes and accessibility improvements.
timezonefinder
Python library for offline timezone lookup by coordinates, with around 5 million monthly downloads. 4 merged pull requests and 2 resolved issues, credited by name in the CHANGELOG: automation of the boundary-data update pipeline, from detecting a new release to auto-merging once CI passes.
Experience
Full-Stack Developer (Django · Next.js)
Origetec · May 2026 – present
Internal title: AI Integrator
- Designed and maintain the REST API for the company-wide management system, used by 30+ people across several departments, built with Django and DRF, JWT authentication and business rules in a dedicated service layer.
- Modeled the PostgreSQL database, enforcing critical rules as constraints and using transactional locking where concurrency matters.
- Built the CI/CD pipelines on GitHub Actions and run production: Docker, Nginx, Ubuntu VM, Cloudflare Tunnel and Sentry.
- Integrated the system with the legacy ERP through a separate API service I wrote and maintain.
Industrial Apprentice (Logistics)
Tupy S.A. · Mar–May 2026
Skills
Languages
Python · SQL · JavaScript · TypeScript
Back-end
Django · Django REST Framework · REST APIs · JWT · background tasks
Databases
PostgreSQL · MySQL · relational modeling
Testing
pytest
Infrastructure
Docker · GitHub Actions · Nginx · Linux · Cloudflare
Front-end
Next.js · React
Education
Bachelor's in Software Engineering
Católica SC · Feb 2026 – Dec 2029 · in progress
Systems Development Technician
SENAI · Feb 2024 – Dec 2025