Susana Ferreira
Senior Software Engineer at Coder
Lisbon, Lisbon, Portugal
Summary
🤩
Rockstar🎓
Top SchoolSusana Ferreira is a Senior Software Engineer based in Lisbon with 11 years of experience building backend and cloud-native systems. She has strong production experience at Grafana Labs and Coder, contributing to high-scale open-source projects like Grafana Loki and Mimir—work that included distributed ring migrations, query optimizations, cardinality endpoints, and gRPC/error-handling improvements. Comfortable across backend and DevOps concerns, she focuses on performance, observability, and reliable multi-tenant architectures. Trained with a Master’s in Software Engineering from Instituto Superior Técnico, she blends rigorous academic foundations with hands-on contributions to widely used observability tooling. An understated strength is her knack for refactoring metrics and query paths to yield measurable runtime improvements in distributed systems.
11 years of coding experience
8 years of employment as a software developer
Master's degree Software Engineering and Information Systems, Master's degree Software Engineering and Information Systems at Instituto Superior Técnico
Portuguese, English, Spanish, German
Github Skills (19)
observability10
back-end-development10
api-design10
distributed-systems10
go10
prometheus10
api10
cloki10
logging10
lokijs10
cloud-native10
metric10
devops9
grpc9
docker8
Programming languages (4)
Github contributions (5)
grafana/loki
Nov 2021 - Jan 2023
Like Prometheus, but for logs.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:160 reviews, 67 commits, 81 PRs in 1 year 2 months
Contributions summary:Susana contributed to the Loki project, focusing on several back-end aspects. They worked on migrating to the `dskit/ring` library, which is crucial for Loki's distributed architecture. They fixed metric prefixes and implemented changes to the query range and instant query mechanisms, like splitting queries by range for performance improvements. Additionally, the user refactored and enhanced the codebase related to the metrics gathering.
logginglokigrafanaprometheuscloudnative
grafana/mimir
Oct 2021 - Aug 2022
Grafana Mimir provides horizontally scalable, highly available, multi-tenant, long-term storage for Prometheus.
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:89 reviews, 38 commits, 14 PRs in 10 months
Contributions summary:Susana primarily contributed to the Grafana Mimir project by implementing and improving the label value cardinality endpoint, a feature for querying and analyzing metric data. They introduced new endpoints, configuration flags, and implemented feature flags for the cardinality analysis handler. Additionally, the user refactored code related to cardinality requests within the distributor and added support for HTTP/gRPC error handling. Furthermore, the user worked on the query-tee tool and added gRPC support to it.
tenantobservabilitygrafanaprometheusstorage
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