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Stefan Hristov

PROFILE

Stefan Hristov

Stefan Hristov engineered cloud cost management and infrastructure solutions across several Ministry of Justice repositories, focusing on automation, governance, and maintainability. In cloud-optimisation-and-accountability, he enhanced Grafana dashboards for cost visibility and established AWS budgeting foundations using Terraform and SQL, improving financial governance. Within aws-root-account, Stefan delivered an hourly S3 CUR v2 export with multi-destination replication, refactoring Terraform modules and updating IAM policies to support robust data engineering workflows. He also led a comprehensive infrastructure cleanup in operations-engineering, deprecating legacy Terraform and CI/CD workflows. His work demonstrated depth in AWS, Infrastructure as Code, and cloud platform management practices.

Overall Statistics

Feature vs Bugs

80%Features

Repository Contributions

32Total
Bugs
1
Commits
32
Features
4
Lines of code
2,492
Activity Months3

Work History

October 2025

10 Commits • 1 Features

Oct 1, 2025

Summary for 2025-10: Implemented a comprehensive infrastructure cleanup by deprecating Terraform configurations and CI/CD workflows, removing Auth0 integration and legacy GitHub resources, and reorganizing remaining IaC assets. This work consolidates state management, reduces surface area, eliminates outdated automation, and lowers operational overhead. Representative commits include 976d207, 5a7e704, f7955d5, 7eadcdf, 18c599ee, ed556974, and 1a1cc5bf.

August 2025

14 Commits • 1 Features

Aug 1, 2025

In August 2025, delivered a robust S3 CUR v2 hourly export with multi-destination replication for MOJAP-DATA-PRODUCTION-CUR-V2-HOURLY in ministryofjustice/aws-root-account. Implemented an hourly data export to a new AP bucket and enabled multi-destination replication to multiple destinations, including production replication, with Terraform adjustments and Terraform module migrations to Community S3 modules. This included refactoring to ensure compatibility with new bucket modules, updating IAM roles/policies, and aligning resource declarations with the new structure.

June 2025

8 Commits • 2 Features

Jun 1, 2025

June 2025 performance summary: Delivered key cost-visibility enhancements and budgeting foundations across two repositories, driving improved cost control and governance. Grafana Cost Dashboard enhancements improved service-area filtering, data presentation, and panel clarity; AWS Cost Categories Budgets Foundation established budgets and REGULAR rules for critical accounts. Also implemented costs-rule accuracy improvements to fix typos and improve matching in Cost Explorer. These changes deliver measurable business value by improving cost visibility, budgeting accuracy, and governance across the cloud estate.

Activity

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Quality Metrics

Correctness91.8%
Maintainability92.6%
Architecture91.2%
Performance86.2%
AI Usage20.0%

Skills & Technologies

Programming Languages

HCLJSONTerraformYAML

Technical Skills

AWSAWS IAMCI/CDCloud Cost ManagementCloud EngineeringCloud InfrastructureCloud Platform ManagementCost ManagementDashboardingData EngineeringData ExportData VisualizationDevOpsGitHub ActionsGrafana

Repositories Contributed To

3 repos

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

ministryofjustice/aws-root-account

Jun 2025 Aug 2025
2 Months active

Languages Used

HCLTerraform

Technical Skills

AWSCloud InfrastructureCost ManagementTerraformCloud EngineeringData Engineering

ministryofjustice/operations-engineering

Oct 2025 Oct 2025
1 Month active

Languages Used

HCLYAML

Technical Skills

AWS IAMCI/CDCloud InfrastructureCloud Platform ManagementDevOpsGitHub Actions

ministryofjustice/cloud-optimisation-and-accountability

Jun 2025 Jun 2025
1 Month active

Languages Used

JSON

Technical Skills

Cloud Cost ManagementDashboardingData VisualizationGrafanaGrafana DashboardingSQL

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