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It's full of buzzwords, metrics and LinkedIn-speak. If you want to see what I actually do, better check out my projects.

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Jaroslav Hrazdera

Platform - DevOps Engineer

📧 jarek@jaroslav.tech | 🌍 Brno, Czech Republic
🌐 jaroslav.tech | 💻 github.com/jardahrazdera

Seeking: Remote or Hybrid Platform/DevOps/SRE role
Available: Immediately

Professional Summary

Platform & DevOps Engineer bridging the gap between infrastructure operations and software development. With 6+ years of hands-on experience, I specialize in building robust, automated environments using Kubernetes, Python, and GitOps workflows. I treat infrastructure as a product, focusing on reliability, security, and developer experience. Active open-source contributor to Basecamp’s Omarchy Linux, personally invited by DHH to collaborate on core system components.

Core Differentiators

  • DevOps Mindset: Strong advocate for "Infrastructure as Code" and automation over manual operations.
  • Open Source Impact: 10+ merged PRs to Omarchy (18.7k+ stars); invited to the core ISO dev team.
  • Hybrid Skillset: Infrastructure stability meets Python backend logic to solve complex platform problems.
  • Hardware & IoT: Deep understanding of physical hardware constraints via custom builds and IoT projects.

Technical Skills

Cloud Native & Platform Engineering

Orchestration: Kubernetes, Helm, ArgoCD (GitOps), Pod Security Standards, Network Policies
Cloud Providers: AWS, Google Cloud Platform (GCP)
CI/CD & Automation: GitHub Actions, Ansible, Terraform (OpenTofu), Automated Testing pipelines
Observability: Prometheus, Grafana, Loki, Metrics & Alerting architecture
Containerization: Docker, Docker Compose, Container Registries strategies

Infrastructure & Security

Operating Systems: Linux (Arch daily driver), Ubuntu, Debian, AlmaLinux (RHEL)
Storage & Recovery: Longhorn storage, Velero backup integration
Security: Trivy (scanning), Falco (runtime), Sealed Secrets, RBAC implementation
Networking: Traefik Ingress, Calico/Flannel (Canal), VPNs, MikroTik IoT & Protocols: MQTT, Eclipse Mosquitto, IoT Device Integration

Development & Scripting

Backend Stack: Python (Django, Flask, FastAPI), REST Frameworks, SQL optimization
Systems Programming: Rust (Basic), Ratatui, Bash scripting for automation
Databases: PostgreSQL, Redis, MySQL, SQLite
Frontend: JavaScript, HTML5, CSS3, Bootstrap

Professional Experience

IT Infrastructure Manager & Technical Specialist

Gridoff Solar s.r.o. | Brno, Czech Republic | September 2019 - December 2025

  • Platform Engineering: Orchestrated complete IT infrastructure, transitioning legacy processes to modern, containerized workflows using Docker.
  • Automation: Developed custom Python automation scripts, eliminating manual toil and saving 15+ hours weekly.
  • Integration: Designed and deployed API integration layers for photovoltaic monitoring systems.
  • Cost Optimization: Reduced IT costs by 75% through strategic self-hosting and resource optimization.
  • Internal Tools: Built and maintained internal data processing tools and company web presence (WordPress).

Technologies: Linux, Docker, Python, Bash, Nginx, API Integrations, Automation

IT Consultant & Infrastructure Administrator

Self-Employed | Brno, Czech Republic | November 2012 - August 2019

  • Hosting Operations: Provisioned and managed high-availability web server infrastructure for 15+ clients.
  • Scripting: Wrote Python scripts to automate system reporting and management tasks.
  • Web Solutions: Delivered performance-tuned WordPress solutions with security hardening.
  • Backend Logic: Implemented PHP modifications and payment gateway integrations.

Technologies: Linux Administration, Python automation, Nginx/Apache, MySQL, PHP

Network Administrator

Airanet s.r.o. | Brno, Czech Republic | June 2007 - September 2012

  • Network Engineering: Managed ISP network infrastructure and provided L2/L3 support.
  • Router Automation: Automated MikroTik configuration and management via scripting.
  • Frontend: Developed customer portals and company presentation layers.

Technologies: Network Protocols, MikroTik, Bash, HTML/CSS, JavaScript

Development Projects & Open Source

DevOps Assessment - Production-Ready Infrastructure

GitHub: github.com/jardahrazdera/devops-assessment Stack: Kubernetes (k3d), ArgoCD, Prometheus, Grafana, PostgreSQL, Redis, FastAPI

  • Full-Stack DevOps: Containerized FastAPI app with caching (Redis) and persistence (PostgreSQL).
  • GitOps Workflow: Implemented declarative deployment via ArgoCD with self-healing capabilities.
  • Observability: Integrated full monitoring stack (Prometheus/Grafana) and security scanning (Trivy).
  • CI/CD: Automated testing and build pipelines via GitHub Actions ensuring production quality.

Kubernetes Homelab - On-Premise Platform

Stack: k3s, ArgoCD, Gitea, Longhorn, Velero, Prometheus, Loki, Falco, Sealed Secrets

  • Private Cloud: Designed a production-grade 2-node cluster demonstrating enterprise platform skills.
  • Security & Storage: Implemented Network Policies, RBAC, Falco runtime security, and distributed storage.
  • Disaster Recovery: Configured automated backups via Velero for business continuity.

Omarchy Linux Distribution - Core Contributor

Impact: 18.7k+ Stars | Used by thousands worldwide Stack: Bash, Linux System Internals, Git

  • System Engineering: Authored the main DNS configuration script for the entire distribution.
  • Collaboration: Personally invited by David Heinemeier Hansson to join the ISO development team.
  • Code Quality: 10+ merged pull requests optimizing system components and stability.

DevTracker - Project Management System

Stack: Django, PostgreSQL, Docker, Alpine.js, GitHub Actions

  • Architecture: Built a complete project management platform with REST API and strong auth patterns.
  • Reliability: Achieved 95% test coverage, deployed via Docker Compose.

Portfolio Platform

Live Demo: jaroslav.tech

  • Showcase: Bilingual, containerized portfolio application demonstrating DevOps and coding skills.

Education & Certifications

Python Backend Developer Certification

CodersLab IT Academy | January 2025 - August 2025 169-hour intensive bootcamp focusing on OOP, REST APIs, TDD, and Python ecosystem.

Electronics Engineering

Secondary School of Industrial Electronics | Prague | 2010

Additional Certifications

  • Electrical Engineering Professional Qualification
  • Photovoltaic Systems Electrician
  • Master of Brewing Arts (MBA)

Languages & Additional Info

Czech: Native Speaker English: B1 (Technically proficient, active open source contributor) Driving License: B, C