Skills
Technical expertise across infrastructure, cloud, backend development, databases, and DevOps tooling.
2025-11-26
Daniel Bodnar
Table of content
- Technical Skills
- Infrastructure & Cloud
- Container Technologies
- Cloud Platforms
- Backend & APIs
- Languages & Frameworks
- API Development
- Databases & Storage
- Database Administration
- Storage Systems
- DevOps & Observability
- CI/CD Platforms
- Observability Stack
- Networking & Security
- Networking
- Security
- Configuration Management & IaC
- Operating Systems
- Additional Competencies
- Certifications & Training
- Related Pages
Technical Skills
A comprehensive breakdown of my technical expertise across multiple domains, built over 30+ years of hands-on experience.
Infrastructure & Cloud
Core competencies in container orchestration, cloud platforms, and Linux systems administration.
| Skill | Proficiency | Experience |
|---|---|---|
| Kubernetes | Expert (95%) | 6+ years |
| Docker | Expert (95%) | 8+ years |
| AWS | Expert (90%) | 7+ years |
| Linux | Expert (98%) | 22+ years |
| Terraform | Advanced (85%) | 5+ years |
| Ansible | Advanced (85%) | 6+ years |
Container Technologies
- Orchestration: Kubernetes, EKS, Rancher, KubeVela
- Runtimes: Docker, Podman, containerd, cri-o, LXC/LXD
- Tools: Helm, kubeadm, kubectl, k9s
Cloud Platforms
- AWS Services: EC2, EKS, S3, VPC, IAM, CloudFormation, CDK, Route53, RDS, Lambda
- Multi-cloud: Cloudflare, DigitalOcean, Linode
- Hybrid: On-premise to cloud migrations, hybrid overlay networks
Backend & APIs
Strong foundation in server-side development with multiple languages and frameworks.
| Skill | Proficiency | Experience |
|---|---|---|
| Node.js | Expert (90%) | 10+ years |
| Go | Advanced (85%) | 5+ years |
| TypeScript | Expert (90%) | 6+ years |
| Python | Proficient (75%) | 8+ years |
| Rust | Intermediate (70%) | 2+ years |
| REST APIs | Expert (95%) | 15+ years |
Languages & Frameworks
- Primary: TypeScript, JavaScript (ES6+), Go, Bash
- Secondary: Python, Rust
- Legacy: Ruby (Rails), PHP, .NET
API Development
- RESTful API design and implementation
- GraphQL endpoints
- gRPC services
- Microservices architecture
- Event-driven architectures
Databases & Storage
Extensive experience with relational, NoSQL, and distributed storage systems.
| Skill | Proficiency | Experience |
|---|---|---|
| PostgreSQL | Expert (95%) | 15+ years |
| MongoDB | Advanced (85%) | 8+ years |
| MySQL | Advanced (85%) | 18+ years |
| Redis | Advanced (80%) | 6+ years |
| DuckDB | Proficient (75%) | 2+ years |
| ZFS | Expert (90%) | 8+ years |
Database Administration
- Performance tuning for 3.5TB+ PostgreSQL clusters
- Query optimization and indexing strategies
- Replication and high-availability configurations
- Backup and disaster recovery planning
Storage Systems
- Filesystems: ZFS, ext4, XFS, Btrfs
- Object Storage: MinIO, S3-compatible
- Block Storage: NVMe, SAN, InfiniBand FC
DevOps & Observability
Building and maintaining CI/CD pipelines, monitoring, and alerting systems.
| Skill | Proficiency | Experience |
|---|---|---|
| GitLab CI/CD | Expert (90%) | 6+ years |
| Jenkins | Advanced (85%) | 8+ years |
| Prometheus | Expert (90%) | 5+ years |
| Grafana | Expert (90%) | 5+ years |
| Jaeger | Advanced (85%) | 4+ years |
| Helm | Advanced (85%) | 5+ years |
CI/CD Platforms
- Primary: GitLab CI, Jenkins, GitHub Actions
- Practices: Blue-green deployments, canary releases, GitOps
Observability Stack
- Metrics: Prometheus, VictoriaMetrics, NetData
- Logging: Loki, ELK Stack (Elasticsearch, Logstash, Kibana)
- Tracing: Jaeger, distributed tracing
- Alerting: Alertmanager, PagerDuty integration
Networking & Security
Deep understanding of network architecture and security best practices.
Networking
- VPN implementation (WireGuard, OpenVPN)
- VLAN configuration and management
- Load balancing (HAProxy, Nginx, Traefik, MetalLB)
- Service mesh (Linkerd)
- DNS management (Cloudflare, Route53)
Security
- Vulnerability Scanning: Trivy, Nessus, OpenVAS, vuls.io, Wazuh
- Penetration Testing: nmap, Metasploit
- Access Control: Teleport, PKI, certificate authorities
- Compliance: Security scanning in CI/CD pipelines
Configuration Management & IaC
Infrastructure as Code and configuration management expertise.
| Tool | Proficiency |
|---|---|
| Terraform | Advanced (85%) |
| Ansible | Advanced (85%) |
| Packer | Proficient (80%) |
| AWS CDK | Advanced (85%) |
| CloudFormation | Advanced (85%) |
| iPXE/Cloud-Init | Expert (90%) |
Operating Systems
| System | Proficiency | Experience |
|---|---|---|
| Arch Linux | Expert | 10+ years |
| Debian/Ubuntu | Expert | 15+ years |
| Alpine Linux | Advanced | 5+ years |
| RHEL/CentOS | Advanced | 12+ years |
| Windows Server | Advanced | 15+ years |
Additional Competencies
Areas of expertise that span multiple technical domains:
- Infrastructure-as-Code
- Site Reliability Engineering
- Microservices Architecture
- Service Mesh
- Load Balancing
- Bare Metal Infrastructure
- Hybrid Cloud
- Multi-Cloud Strategies
- Security Hardening
- Performance Tuning
- High Availability Design
- Disaster Recovery
- Monitoring & Alerting
- Distributed Logging
- Distributed Tracing
- GitOps Workflows
- Blue-Green Deployment
- Canary Deployment
- Container Orchestration
- Network Automation
Certifications & Training
While I primarily learn through hands-on experience and self-study, I stay current with:
- AWS best practices and new service offerings
- Kubernetes ecosystem developments
- Security vulnerability research
- Open source project contributions
Related Pages
- Experience - See these skills in action
- Tech Stacks - My preferred tool combinations
- Resume - Full professional background