Josue Abreu
Principal Software Engineer at Grafana Labs
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJosue Abreu is a Principal Software Engineer based in London with 14 years of experience building large-scale, cloud-native observability and alerting systems. He founded the Dominican Republic’s first Ruby consulting firm, led it to acquisition, and later helped scale GoCardless and Grafana Labs from early-stage teams into high-impact organizations. At Grafana he created and maintains the Mimir Alertmanager and now leads the Alerting team while contributing as a maintainer to flagship open-source projects like Prometheus, Cortex and Grafana. His background blends backend engineering, DevOps and product-minded design, with deep expertise in metric ingestion, metadata handling and distributed alert delivery. Notably, his work on Mimir and Cortex improved ingestion reliability and metadata propagation across some of the most widely used telemetry systems in production.
14 years of coding experience
10 years of employment as a software developer
Msc Computer Science, Msc Computer Science at City St George’s, University of LondonBsc Computer Science, Bsc Computer Science at Pontificia Universidad Católica Madre y Maestra
English, Chinese, Spanish
Github Skills (40)
monitoring10
kubernetes10
web-application10
back-end-development10
apidoc10
testing10
configuration-management10
command-line-interface10
time-series10
hanami10
ruby10
go10
prometheus10
api10
webapp10
Programming languages (11)
Github contributions (5)
prometheus/alertmanager
Feb 2021 - Jan 2023
Prometheus Alertmanager
Role in this project:
Back-end Developer
Back-end DeveloperContributions:423 reviews, 69 commits, 259 PRs in 1 year 11 months
Contributions summary:Josue contributed to the Prometheus Alertmanager project by implementing and refactoring core functionalities within the cluster, API, and notification log modules. They made the `MaxGossipPacketSize` public and introduced interfaces for `ClusterPeer` and `ClusterChannel` to enhance modularity and support different clustering implementations. Furthermore, they refactored the configuration options for the notification log and made several API modifications to improve the user experience, including making several conversion functions public.
opsgenieprometheus-exporterpagerdutyemaildeduplication
grafana/mimir
May 2020 - Jan 2023
Grafana Mimir provides horizontally scalable, highly available, multi-tenant, long-term storage for Prometheus.
Role in this project:Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:306 reviews, 89 commits, 97 PRs in 2 years 8 months
Contributions summary:Josue contributed to core functionality of the Grafana Mimir project, including handling invalid metric names, improving the error handling for data ingestion, and implementing new features related to metric metadata. Their work involved modifying core components like the distributor and ingester, focusing on improving data validation, error reporting, and enhancing the project's ability to receive metric metadata. The user's contributions also include refactoring existing code to improve efficiency and incorporating support for Grafana Alertmanager configuration and state.
tenantobservabilitygrafanaprometheusstorage
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