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Daniel Siebert

Cloud Engineer | FinOps | Senior Finance Controller

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With over 12 years of experience in finance and IT management and deep expertise in SAP and M&A, I build the bridge between financial systems and cloud technologies.

I combine ERP implementation, process optimization, and risk management with cloud engineering (AWS, Terraform, Docker, CI/CD).

My recent focus includes RDS (PostgreSQL) and EC2 optimization, cost automation, and CloudWatch-based reporting — aligned with FinOps principles. Currently completing the FinOps Certified Practitioner program.

Location

Stuttgart, Germany

Email

daniel@siebert.cv

Looking for

full-time or freelance roles

🎥 Introduction Video

Projects

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Layered AI (Webeet.io)

Layered AI (Webeet.io)

Designed and deployed a secure, cost-optimized AWS infrastructure using Terraform, supporting immutable EC2 rollouts via ASG and Packer, with private subnets for mTLS service communication and centralized FinOps automation. Monitoring, secrets access, and GitHub CI workflows are fully integrated for production readiness.

TerraformPackerAWS (EC2, VPC, ASG, IAM, SSM)GitHub ActionsDockerPgBouncerPostgreSQLCloudWatchSecrets ManagerPrometheusGrafanaLokiWireGuardFastAPICI/CDFinOpsImmutable InframTLS
Company project
Instagram Scraper

Instagram Scraper

Developed a modular, production-ready Instagram scraping system with Oxylabs proxy integration, automated scheduling, and real-time data usage tracking. The scraper supports image, video, and metadata collection via Instaloader with deduplication, SQLite persistence, and email notifications for reliability. Integrated with logging, rate-limit handling, and session management for stable long-term operation.

PythonInstaloaderOxylabs ProxySQLiteRequestsThreadPoolExecutorArgparseScheduleRotating LogsSMTP NotificationsError HandlingSession ManagementData DeduplicationRate LimitingAutomationScraping
Code

AWS Grocery App Infrastructure

Engineered a production-ready AWS infrastructure for GroceryMate v2 using Terraform and a fully automated Bash deployment script. The system leverages immutable EC2 rollouts via Auto Scaling Groups, JWT and DB secrets via AWS Secrets Manager, and an SSH/SCP-based deployment pipeline through a bastion host. The Bash script automates frontend build distribution from S3, backend updates, permission fixes, service restarts, and instance refresh orchestration. PostgreSQL is provisioned on RDS with secure IAM access. Nginx serves static React builds with asset caching and error fallback. Monitoring, cost control, and CI workflows complete the DevSecOps stack.

TerraformAWS (EC2, ASG, RDS, VPC, S3, IAM, Secrets Manager)GitHub ActionsBashSSHSCPAuto ScalingInstance RefreshPostgreSQLFlaskGunicornReactNginxDockerCloudWatchIAM RolesSecrets RotationImmutable InfraCI/CDStatic HostingCost OptimizationDevSecOpsAutomation
Code

Experience

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DevSecOps Engineer

August - September 2025

Webeet.io · Amsterdam, Netherlands - Remote

  • Network / VPC: Public/Private subnets, Edge NAT, egress testscripts
  • App & Data: Docker Compose stack, PostgreSQL + PgBouncer with mTLS, k6 tests, backup/restore workflows
  • Admin Paths: SSH + mTLS, WireGuard tested, runbooks documented
  • FinOps & Cost Optimization: Implemented AWS Lambda automation for EC2 runtime optimization, orphaned resource cleanup, and budget alerting.
  • Designed tagging strategy and Cost Explorer dashboards to monitor RDS and EC2 utilization, improving visibility and compliance.
  • Tuned PostgreSQL (RDS) and PgBouncer connection pooling for performance and cost efficiency, contributing to the FinOps roadmap.
  • CI/CD: GitHub Actions with OIDC → IAM, fmt/lint gates, drift detection (SAST not yet implemented)
  • Docs & Governance: Architecture Decision Records (ADRs), runbooks, Reflection Matrix, smoke tests
  • Observability: logging, metrics, and dashboards
TerraformAWSPgBouncerPostgreSQLFinOpsCI/CDGitHub ActionsCloudWatchWireGuard

Senior Finance Controller

March 2022 - May 2024

ISS A/S · Stuttgart

  • Directly advised the CFO on strategic financial initiatives, including a turnaround program that improved cost efficiency and financial stability.
  • Served as the primary financial liaison for the operational Key Account Manager in the Mercedes-Benz division, supporting 9 locations across Germany in core operational services (cleaning, catering, and technology).
  • Redefined the cost and revenue structure, conducting in-depth contract and SAP analyses, leading to optimized re-/calculation and approval processes for offers.
  • Successfully reorganized the monthly reporting system, preparing the company for the divestment of its Germany operations.
  • Led the execution of monthly financial statements, performing variance and weak-point analyses to identify cost-saving opportunities and improve financial forecasting accuracy.
  • Managed critical balance sheet topics, identifying IT savings potential, optimizing fixed asset management, and refining revenue/earnings accrual processes to enhance financial transparency and operational efficiency.
Financial StrategyControllingReportingSAPForecastingProcess OptimizationLeadership

Software Dev. & Cloud Eng. Program

July 2024 - September 2025

Masterschool · Remote

  • Completed a 60-week immersive program (3000+ teaching hours) covering the foundations of software engineering and specialization in cloud engineering and DevOps.
  • Software Engineering: Python (intro to advanced), OOP, web development (HTML, CSS, HTTP, REST APIs), Git/GitHub.
  • Backend & Databases: Flask, SQL, PostgreSQL, relational data modeling, ORM, Linux systems.
  • Cloud & DevOps: AWS (EC2, VPC, RDS, S3, Lambda, IAM, CloudWatch), Infrastructure as Code (Terraform, AWS CDK), Docker, CI/CD pipelines, serverless deployment, container orchestration.
  • Specialization: Cloud networking (VPC, peering, NAT), monitoring & logging, FinOps principles, and AWS cost optimization techniques.
PythonFlaskPostgreSQLTerraformAWSDockerCI/CDFinOpsCloud Engineering

Master of Business Administration

October 2008 - March 2012

University of Nuremberg · Nuremberg, Germany

  • Graduated with a Master of Business Administration from the University of Nuremberg, Germany.
  • Specialized in Business Law, Auditing, Economic History, and Financial Accounting.
  • Completed coursework in Strategic Management, Corporate Taxation, Business Valuation, and Risk Management.
  • Developed a solid foundation in corporate governance, regulatory compliance, and financial oversight.
  • Conducted academic research on the intersection of historical economic policies and modern fiscal frameworks.
  • Thesis focused on the “Marriage in Heaven” – the unprecedented M&A deal between Daimler-Benz and Chrysler – developed in direct collaboration with Daimler AG and former executive board members.
MBABusiness LawAuditingCorporate GovernanceStrategic ManagementFinancial Accounting