Computer Science student and software developer based in São Paulo, Brazil.
I work mostly on backend systems, automation, CI, and application security. I am open to part-time remote contract work.
- Backend APIs with Python, FastAPI, Node.js, and Spring Boot
- Automation and data processing with Python
- Testing, static analysis, and GitHub Actions
- Application security and JWT authentication
- Cryptographic inventory and post-quantum migration tooling
- PostgreSQL, Redis, Docker, and CI/CD
Open-source cryptographic risk scanner published on PyPI.
pqcheck analyzes source code, binaries, certificates, and keys, then generates CBOM and SARIF reports. It can enforce cryptographic policies in CI and identify algorithms that may create migration risks in a post-quantum transition.
The project uses Python and Go, with strict typing, automated tests, cross-platform CI, reproducible builds, and Sigstore-signed releases.
A reproducible dataset and measurement pipeline for post-quantum TLS adoption.
A Go probe performs real TLS 1.3 handshakes. Python tooling collects, classifies, and validates the results. OpenSSL provides an independent check, and timeouts or errors are recorded as unknown instead of being treated as positive results.
Go, Python, TLS 1.3, OpenSSL, GitHub Actions, and reproducible data pipelines.
At Inteli, I have worked on software projects with partner companies. My work has included:
- Optimization algorithms and decision-support systems
- FastAPI backends with Celery, Redis, and PostgreSQL
- Spring Boot APIs and graph algorithms
- IoT monitoring with ESP32, MQTT/TLS, and Node.js
- Authentication, endpoint protection, database migrations, and CI
- Email: contato.rafaelnakahara@gmail.com
- LinkedIn: linkedin.com/in/rafael-ryu
I am available for remote contract work involving backend development, automation, testing, CI, and application security.