João Calisto
Software Engineer at Grafana Labs
Lisbon Metropolitan Area Portugal
Summary
🤩
Rockstar🎓
Top SchoolJoão Calisto is a software engineer with nine years' experience building full-stack and backend systems, currently contributing to Grafana Labs from the Lisbon area. He combines security-focused work (CSP and custom headers) and feature design with front-end improvements on the high-profile open-source Grafana project, reflecting a balance of UX sensitivity and platform-grade engineering. His background includes real-time data integration for mobility services, remote authentication and liveness detection, and research-grade mobile sensing for travel mode detection, showing strength in reliable data pipelines and identity-critical workflows. Comfortable across Python, Django, Java, Spring, Node.js and relational databases, he excels at integrating heterogeneous services and processing large, time-sensitive datasets. Collected academic training from Instituto Superior Técnico underpins a pragmatic approach to solving complex data and security problems in production systems.
9 years of coding experience
3 years of employment as a software developer
Bachelor's degree, Information Systems and Computer Engineering, Bachelor's degree, Information Systems and Computer Engineering at Instituto Superior Técnico
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (12)
go10
content-security-policy10
feature-management10
alerts9
apidoc9
api9
dashboard6
javascript6
react6
data-visualisation5
data-visualization5
data-visualizations5
Programming languages (4)
Github contributions (5)
grafana/grafana
Nov 2022 - Nov 2022
The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:29 reviews, 2 commits, 28 PRs in 14 days
Contributions summary:João contributed to the Grafana project by implementing features related to Content Security Policy (CSP) and custom HTTP response headers, enhancing the application's security posture. They also worked on a fix for HA alerting membership sync, ensuring data consistency within the alerting system. Further contributions included the definition of a new API for feature toggle management, alongside UI improvements, demonstrating a focus on both backend functionality and frontend user experience.
visualizeobservabilitybusiness-intelligencegrafanaprometheus
pevidex/mangee-backend
Mar 2020 - Nov 2020
Contributions:123 pushes in 8 months
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