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Gustavo PossebonSenior Software Engineer
Senior Sistemas

Identity, access, and performance improvements

Worked in the architecture team on authentication and high-volume domain filtering across a multi-product enterprise platform.

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Challenge

What needed to be solved

The platform needed stronger identity infrastructure and faster, more reliable filtering between systems without sacrificing maintainability.

  • Authentication had to support diverse protocols and many downstream applications.
  • Filtering workloads were performance-sensitive and had to be production-safe.
  • Platform reliability depended on strong tests, observability, and operational discipline.
Contributions

What I owned

The parts I actually owned, not just touched.

  • Implemented SAML, LDAP, and Keycloak-based authentication covering 50+ applications.
  • Delivered the Abrangencia filtering feature with Redis caching and comprehensive tests.
  • Expanded test coverage past 80% and reinforced quality practices through reviews and mentoring.
  • Used RabbitMQ, Kong, Grafana, Kibana, and Terraform to support stability and incident response.
Outcomes

What changed

What got faster, more reliable, or less painful.

  • Reduced average query response time from 500ms to 200ms.
  • Improved throughput for high-volume filtering operations.
  • Contributed to 99.5%+ availability targets and MTBF beyond six months.
Takeaway

What this says about how I work

Most of the architecture work here wasn't adding new pieces — it was getting auth, performance, and maintainability to stop fighting each other.