
Jeroen developed and maintained core infrastructure for Grafana’s provider ecosystem, focusing on the grafana/crossplane-provider-grafana and grafana/terraform-provider-grafana repositories. He delivered new features such as expanded resource management via custom resource definitions and improved automation through CI/CD workflow enhancements. Using Go and Terraform, Jeroen implemented robust validation, dependency management, and security hardening, addressing issues like resource recreation bugs and access policy controls. His work included Backstage catalog integration for better discoverability and governance, as well as migration to Renovate for streamlined dependency updates. These efforts resulted in more reliable deployments, clearer ownership, and improved contributor and operator experience.

October 2025: Delivered targeted enhancements and critical upgrades across Grafana provider tooling, delivering tangible business value through improved discoverability, broader API capabilities, and streamlined maintenance. Key outcomes include Backstage catalog enhancements for terrafor m-provider-grafana, an upgrade to the Grafana Terraform Provider v4.12 with expanded resource coverage, new CRDs for extended resource management, and migration of dependency tooling from Dependabot to Renovate.
October 2025: Delivered targeted enhancements and critical upgrades across Grafana provider tooling, delivering tangible business value through improved discoverability, broader API capabilities, and streamlined maintenance. Key outcomes include Backstage catalog enhancements for terrafor m-provider-grafana, an upgrade to the Grafana Terraform Provider v4.12 with expanded resource coverage, new CRDs for extended resource management, and migration of dependency tooling from Dependabot to Renovate.
September 2025 monthly summary: Delivered stability improvements and governance refinements across Grafana's Terraform and Crossplane provider repos. Fixed a resource recreation bug in grafana/crossplane-provider-grafana to prevent unstable recreation loops during pod restarts, and added Backstage catalog metadata tags to improve GitOps discoverability. In grafana/terraform-provider-grafana, completed a Code Ownership Cleanup to simplify and clarify responsibilities. These efforts reduce runtime churn, improve deployment reliability, streamline ownership management, and enhance discoverability for GitOps workflows. Technologies demonstrated included Go-based bug fixes, Backstage catalog integration, and CODEOWNERS governance.
September 2025 monthly summary: Delivered stability improvements and governance refinements across Grafana's Terraform and Crossplane provider repos. Fixed a resource recreation bug in grafana/crossplane-provider-grafana to prevent unstable recreation loops during pod restarts, and added Backstage catalog metadata tags to improve GitOps discoverability. In grafana/terraform-provider-grafana, completed a Code Ownership Cleanup to simplify and clarify responsibilities. These efforts reduce runtime churn, improve deployment reliability, streamline ownership management, and enhance discoverability for GitOps workflows. Technologies demonstrated included Go-based bug fixes, Backstage catalog integration, and CODEOWNERS governance.
Month: 2025-07 focused on improving discoverability, governance, and documentation for grafana/crossplane-provider-grafana. Delivered Backstage integration scaffolding and status documentation, including a catalog-info.yaml to enable Backstage integration and documentation of project status and components. README updated to explicitly mark the tool as experimental and to set usage expectations for production environments. This work establishes a foundation for internal tooling adoption and cross-team collaboration in the Grafana Crossplane provider ecosystem.
Month: 2025-07 focused on improving discoverability, governance, and documentation for grafana/crossplane-provider-grafana. Delivered Backstage integration scaffolding and status documentation, including a catalog-info.yaml to enable Backstage integration and documentation of project status and components. README updated to explicitly mark the tool as experimental and to set usage expectations for production environments. This work establishes a foundation for internal tooling adoption and cross-team collaboration in the Grafana Crossplane provider ecosystem.
June 2025 highlights across Grafana provider work: delivered reliability and governance improvements for two repositories (grafana/crossplane-provider-grafana and grafana/terraform-provider-grafana).
June 2025 highlights across Grafana provider work: delivered reliability and governance improvements for two repositories (grafana/crossplane-provider-grafana and grafana/terraform-provider-grafana).
May 2025 highlights across grafana/jsonnet-libs and grafana/crossplane-provider-grafana: delivered performance improvements, expanded Grafana Cloud capabilities, stabilized resource management, and upgraded tooling for future stability; increased reliability, scalability, and customer value.
May 2025 highlights across grafana/jsonnet-libs and grafana/crossplane-provider-grafana: delivered performance improvements, expanded Grafana Cloud capabilities, stabilized resource management, and upgraded tooling for future stability; increased reliability, scalability, and customer value.
April 2025 focused on dependency hygiene and feature readiness for grafana/crossplane-provider-grafana. Delivered two key capabilities and prepared the groundwork for broader provider feature adoption across the project.
April 2025 focused on dependency hygiene and feature readiness for grafana/crossplane-provider-grafana. Delivered two key capabilities and prepared the groundwork for broader provider feature adoption across the project.
2025-03 Monthly Summary for grafana/crossplane-provider-grafana focusing on business value and technical achievements. This month delivered stability improvements, automation, and broader API coverage that enable faster integration cycles and cleaner release histories. Overall impact includes reduced maintenance overhead, earlier detection of configuration issues, and more reliable provider behavior across Grafana APIs. Technologies demonstrated include Go, linting with golangci-lint, Dependabot automation, Terraform provider patterns, and multi-API integration.
2025-03 Monthly Summary for grafana/crossplane-provider-grafana focusing on business value and technical achievements. This month delivered stability improvements, automation, and broader API coverage that enable faster integration cycles and cleaner release histories. Overall impact includes reduced maintenance overhead, earlier detection of configuration issues, and more reliable provider behavior across Grafana APIs. Technologies demonstrated include Go, linting with golangci-lint, Dependabot automation, Terraform provider patterns, and multi-API integration.
February 2025 performance highlights across grafana/jsonnet-libs and grafana/terraform-provider-grafana. Key features delivered include: (1) Static Exporter HTTP config defaults: make withHttpConfig the default, introduce withoutHttpConfig, and adjust deployment to conditionally mount the httpd config so the exporter is scraped by Prometheus 3.x by default (commit 8948a8a3a8b3dacb3a6ff7074617970b04792a76). (2) Grafana Terraform Provider: add allowed_subnets to resource_access_policy to enable CIDR-based IP allow lists, with validation and documentation/schema updates (commit 8a269eaeda62ae32590692187280ec80945e602a). These changes fix default exporter behavior gaps and strengthen access control. Overall impact and accomplishments: Improved security posture and deployment consistency, with out-of-the-box Prometheus 3.x scraping support and enhanced governance for access policies. Demonstrated capabilities in Terraform provider schema evolution, CIDR validation, and deployment configuration. Technologies/skills demonstrated: Terraform provider schema extension, CIDR notation validation, deployment/configuration tuning (httpd config mounting), Prometheus scrapes compatibility (Prometheus 3.x), and documentation updates.
February 2025 performance highlights across grafana/jsonnet-libs and grafana/terraform-provider-grafana. Key features delivered include: (1) Static Exporter HTTP config defaults: make withHttpConfig the default, introduce withoutHttpConfig, and adjust deployment to conditionally mount the httpd config so the exporter is scraped by Prometheus 3.x by default (commit 8948a8a3a8b3dacb3a6ff7074617970b04792a76). (2) Grafana Terraform Provider: add allowed_subnets to resource_access_policy to enable CIDR-based IP allow lists, with validation and documentation/schema updates (commit 8a269eaeda62ae32590692187280ec80945e602a). These changes fix default exporter behavior gaps and strengthen access control. Overall impact and accomplishments: Improved security posture and deployment consistency, with out-of-the-box Prometheus 3.x scraping support and enhanced governance for access policies. Demonstrated capabilities in Terraform provider schema evolution, CIDR validation, and deployment configuration. Technologies/skills demonstrated: Terraform provider schema extension, CIDR notation validation, deployment/configuration tuning (httpd config mounting), Prometheus scrapes compatibility (Prometheus 3.x), and documentation updates.
January 2025 snapshot: Delivered key features, fixed critical CI/QA issues, and advanced platform capabilities across Grafana provider ecosystems. Key features delivered include slug-based external-name identification for Grafana Cloud Stack imports with robust error handling; new Grafana Cloud organization and AWS provider resources for organizations, AWS accounts, and CloudWatch scrape jobs; and a new valueAsFloat option in the static exporter for precise metric representation. Major bugs fixed include removing the tag.yaml workflow to prevent CI-trigger issues and updating synthetic monitoring probe references to current locations to ensure tests reflect available probes and avoid false failures. Overall impact: accelerated onboarding for Grafana Cloud customers, improved metric precision, and more reliable CI/testing. Technologies demonstrated: Terraform provider development, Jsonnet-libs enhancements, CI/CD workflow optimization, error-handling robustness, and cross-repo collaboration.
January 2025 snapshot: Delivered key features, fixed critical CI/QA issues, and advanced platform capabilities across Grafana provider ecosystems. Key features delivered include slug-based external-name identification for Grafana Cloud Stack imports with robust error handling; new Grafana Cloud organization and AWS provider resources for organizations, AWS accounts, and CloudWatch scrape jobs; and a new valueAsFloat option in the static exporter for precise metric representation. Major bugs fixed include removing the tag.yaml workflow to prevent CI-trigger issues and updating synthetic monitoring probe references to current locations to ensure tests reflect available probes and avoid false failures. Overall impact: accelerated onboarding for Grafana Cloud customers, improved metric precision, and more reliable CI/testing. Technologies demonstrated: Terraform provider development, Jsonnet-libs enhancements, CI/CD workflow optimization, error-handling robustness, and cross-repo collaboration.
December 2024 monthly summary for Grafana Terraform providers. Focused on stabilizing dependency updates, upgrading core provider components, and enabling robust cross-resource referencing to improve automation, reliability, and interoperability across Grafana resources.
December 2024 monthly summary for Grafana Terraform providers. Focused on stabilizing dependency updates, upgrading core provider components, and enabling robust cross-resource referencing to improve automation, reliability, and interoperability across Grafana resources.
November 2024 monthly summary highlighting governance, reliability, and contributor experience improvements across Grafana repos. Delivered code ownership realignments to improve review governance, hardened resource validations to prevent misconfigurations, modernized CI/CD pipelines for faster, safer releases, and standardized contributor templates to improve triage. All efforts oriented toward clearer ownership, reduced build/release risk, and an improved experience for users and contributors.
November 2024 monthly summary highlighting governance, reliability, and contributor experience improvements across Grafana repos. Delivered code ownership realignments to improve review governance, hardened resource validations to prevent misconfigurations, modernized CI/CD pipelines for faster, safer releases, and standardized contributor templates to improve triage. All efforts oriented toward clearer ownership, reduced build/release risk, and an improved experience for users and contributors.
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