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Sebastian Duran

PROFILE

Sebastian Duran

Sebastian Duran engineered robust cloud infrastructure and observability solutions for the Altinn/altinn-platform repository, focusing on deployment automation, monitoring, and secure resource management. He developed and integrated services such as the Lakmus Go-based secret expiration monitor and enhanced PostgreSQL operator automation, leveraging technologies like Go, Terraform, and Kubernetes. His work included implementing CI/CD pipelines with GitHub Actions, refining Azure Key Vault access controls, and extending Grafana-based monitoring across environments. By emphasizing Infrastructure as Code and automated testing, Sebastian improved deployment reliability, incident response, and resource governance, demonstrating depth in cloud security, backend development, and scalable DevOps practices throughout the platform.

Overall Statistics

Feature vs Bugs

88%Features

Repository Contributions

39Total
Bugs
3
Commits
39
Features
22
Lines of code
63,313
Activity Months13

Work History

January 2026

3 Commits • 1 Features

Jan 1, 2026

January 2026 monthly update for Altinn Platform: Delivered Azure PostgreSQL and dis-pgsql operator enhancements, enabling a flexible Azure server with customizable storage options and performance tiers, plus Flux-based deployment configuration for the dis-pgsql operator (Kustomization and OCI repo integration) to streamline deployments and Azure integration. Fixed resource ownership identification by switching from rgName to ARMID and added tests to ensure ARMID correctness in the database controller. These changes improve deployment flexibility, Azure stability, and ownership reliability, with measurable business value in faster, more reliable deployments and safer resource management.

December 2025

3 Commits • 2 Features

Dec 1, 2025

Month 2025-12 monthly summary: Implemented critical PostgreSQL operator enhancements in Altinn-platform to improve deployment automation, connectivity, and resource governance. Subnet management enables dynamic subnet allocation with environment variable validation and improved error handling for subnet allocation failures. Private DNS zone management enables creation and linking of DNS zones to Azure virtual networks for enhanced database connectivity, with owner references refined to include the ARM ID for accurate resource identification. Result: faster, more reliable database provisioning, improved isolation across environments, and reduced operational risk.

November 2025

3 Commits • 2 Features

Nov 1, 2025

November 2025: Delivered key improvements to observability and initiated metrics-ready infrastructure for the dis-pgsql-operator. Refactored the observability module to improve resource management and upgraded OpenTelemetry components, including a fix to stop using resource data in an unintended way. Also added a skeleton for the dis-pgsql-operator with CI/CD workflows, Dockerfile, and Kubernetes manifests to enable metrics exposure, setting the stage for operator observability and easier deployment. These changes enhance system reliability, reduce toil in monitoring, and support faster incident response and capacity planning.

October 2025

4 Commits • 3 Features

Oct 1, 2025

Month: 2025-10 — Focused on deployment automation, pipeline simplification, and observability enhancements for Altinn platform. Consolidated Lakmus manifest generation via a single cdk8s synthesis step, removed redundant manifest files, and cleaned up imports and dependencies. Streamlined releases by removing Kustomize workflows from Lakmus CI. Extended Terraform observability to reuse existing Azure resources, reducing cloud resource churn. Updated Makefile/README to reflect changes. No major bugs reported; stability improvements delivered through code and config hygiene.

September 2025

3 Commits • 1 Features

Sep 1, 2025

September 2025 — Altinn/altinn-platform: Lakmus Service initial release for Azure Key Vault secret expiration monitoring with Prometheus metrics; containerization and CI/CD foundation enabling automated builds and deployments. No major bugs reported. Focused on delivering business value through credential expiry visibility, reliability, and faster deployment cycles.

August 2025

3 Commits • 2 Features

Aug 1, 2025

2025-08 Monthly Summary for Altinn/altinn-platform: Delivered security and observability enhancements for Lakmus and laid groundwork for proactive secret monitoring. Key features delivered: 1) Key Vault access control hardening for Lakmus observability: switched to a service principal object ID for role assignments, with updates to Terraform variable definitions and documentation to reflect the change; aligns permissions with Lakmus integration. 2) Obs-tf enhancement: added Lakmus app to handle Key Vault metadata, improving observability integration and permission granularity. Major bugs fixed: 1) Observability module: fix to use service principal object ID as Terraform var, preventing incorrect permissions (commit ce5f31271d0bfaa952964ca744f5c9d70be98394). 2) Obs-tf: update to include Lakmus app for KV metadata handling (commit ac55994200d44c3d6b1af4eecd090195293a1b60). RFC/governance work: 1) Published RFC for expiring secrets monitoring describing a lightweight Go service named Lakmus to scan Azure Key Vault for expiring secrets and expose observability signals to Grafana (commit 030a5901c9acc642ba21a1274f8bad80642bc41e). Overall impact and accomplishments: - Strengthened security posture and correctness of Key Vault access control, reducing risk of misconfigurations. - Improved observability readiness and integration with Lakmus, enabling proactive monitoring signals in Grafana. - Established a governance baseline (RFC) for expiring secrets monitoring, guiding future development of a dedicated Lakmus Go service and preventing outages. Technologies/skills demonstrated: - Terraform IaC and variable management - Azure Key Vault and service principal-based access control - Observability and monitoring integrations (Grafana signals) - RFC/docs-driven governance and collaboration - Documentation updates and change management

May 2025

4 Commits • 2 Features

May 1, 2025

May 2025: Delivered end-to-end observability and security improvements for Altinn Platform with AKS integration across environments (auth-at22). Implemented a Terraform-based observability module to deploy Log Analytics, Application Insights, and Azure Monitor, with federation/identity alignment and correct Key Vault resource group naming. Added External Secrets Operator to AKS resources and enhanced OpenTelemetry configuration by wiring Key Vault URI, client ID, and tenant ID. Resolved a blocking CI/CD issue by granting the proper role for the pipeline to access Key Vault secrets in the observability module. These changes enable faster incident response, stronger security, and scalable operational insight, leveraging Terraform, AKS, OpenTelemetry, and cloud security practices.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary focused on delivering observability enhancements in the Altinn platform. Key feature delivered: OpenTelemetry operator and collector deployment integration for the AKS resources module, including two new Azure API resources to deploy these components in-cluster. Configured OCI-based repositories for the OpenTelemetry operator and collector to streamline deployment, updates, and rollbacks, with explicit synchronization and reconciliation settings. This work enhances end-to-end observability, improves incident response, and aligns with the platform’s monitoring strategy. No major bugs fixed this month; activities concentrated on feature delivery and reliability improvements.

February 2025

2 Commits • 1 Features

Feb 1, 2025

February 2025: Delivered cross-environment Grafana monitoring enhancements for Altinn Platform, including studio logging data sources, role-based permissions, and Terraform-based linkage of Grafana identities to monitoring resources across test, staging, and production. Work captured in commits feat(grafana): add studio logs (#1302) and fix(grafana): add access to app insights (#1303). Resulted in improved observability, faster incident detection, and stronger access control for monitoring data, with demonstrated proficiency in Observability, IaC (Terraform), and RBAC design.

January 2025

3 Commits • 2 Features

Jan 1, 2025

January 2025 monthly summary: Delivered major enhancements to Grafana integration for Dialogporten, including provisioning editor access for Dialogporten developers and expanding monitoring across DP environments with new data sources and dynamic resource allocation. Completed CI/CD environment expansion for Altinn/altinn-receipt to include the yt01 deployment environment in the build-and-push workflow. Coordinated work across two repositories (altinn-platform and altinn-receipt) to improve observability, access governance, and deployment velocity.

December 2024

1 Commits • 1 Features

Dec 1, 2024

December 2024 (Month: 2024-12) – Altinn Platform: Delivered Grafana monitoring configuration for Dialogporten in the test environment, enabling visibility into Dialogporten resources via configured data sources and role-based access to logs and resource group information. No major bugs fixed this month. Impact: strengthened observability and faster diagnostics in non-prod, supporting capacity planning and data-driven decisions. Technologies/skills demonstrated: Grafana data-source configuration, access control (RBAC), test-environment provisioning, and end-to-end observability practices.

November 2024

3 Commits • 2 Features

Nov 1, 2024

November 2024 performance summary: Delivered targeted observability and CI tracing improvements across Altinn Studio and Platform, driving higher deployment reliability and faster incident response. Focused on strengthening load balancer visibility and stabilizing trace export in CI, with concrete, business-value outcomes in monitoring accuracy and system uptime.

October 2024

6 Commits • 2 Features

Oct 1, 2024

Monthly summary for 2024-10 (Altinn/altinn-platform): Focused on stabilizing tracing and CI/CD workflows to boost reliability and observability. Delivered reliability and performance improvements in the CI/CD tracer action, fixed a critical Azure Monitor exporter shutdown issue, and enhanced Grafana annotation CI workflows. Demonstrated expertise in OpenTelemetry tracing, batching/shutdown patterns, Azure Monitor integration, Grafana workflows, and CI/CD automation. Resulting business value includes more reliable builds and traces, reduced CI/CD errors, and faster issue diagnosis through improved observability.

Activity

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Quality Metrics

Correctness86.0%
Maintainability85.8%
Architecture83.6%
Performance77.8%
AI Usage25.2%

Skills & Technologies

Programming Languages

DockerfileGoHCLMakefileMarkdownTerraformTypeScriptYAMLmakefiletypescript

Technical Skills

AzureAzure Key VaultAzure Kubernetes Service (AKS)Azure MonitorCDK8sCI/CDCloud EngineeringCloud InfrastructureCloud SecurityCloud infrastructure managementConfiguration ManagementDevOpsDockerError HandlingFlux

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

Altinn/altinn-platform

Oct 2024 Jan 2026
13 Months active

Languages Used

TypeScriptYAMLHCLTerraformGoMarkdownDockerfileMakefile

Technical Skills

Azure MonitorCI/CDError HandlingGitHub ActionsObservabilityOpenTelemetry

Altinn/altinn-studio

Nov 2024 Nov 2024
1 Month active

Languages Used

YAML

Technical Skills

CI/CDDevOpsHelmKubernetesObservability

Altinn/altinn-receipt

Jan 2025 Jan 2025
1 Month active

Languages Used

YAML

Technical Skills

CI/CDGitHub Actions

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