Alexander Weidinger

I design, build, and operate secure, resilient, and long-term maintainable IT systems.|

My core expertise spans

IT- and Information Security
Software Engineering
DevOps and Infrastructure as Code

My current focus includes

Rust, LLM-assisted software development
Elimination of security vulnerabilities
Reduction of Trusted Computing Base

I work across a broad technical stack, including

• Ruby, Python, JavaScript, Bash, Rust, and SQL
• (Some time ago: C, Java, PHP, C#)
• Rails, HTML, CSS, XML, YAML, JSON, etc.
• Git, GitHub, GitLab, Gitea, GitHub Actions, Jenkins
• PostgreSQL, MySQL/MariaDB, SQLite
• Docker, Docker Swarm, Proxmox, KVM, Vagrant, VirtualBox, SaltStack, Puppet
• Aptly, Packer, FPM, rpi-image-gen
• Debian GNU/Linux, FreeBSD, OpenBSD, Raspbian
• A bit of IoT; Raspberry Pi, MQTT
• Network technology; routing, switching, firewalls
• Applied cryptography; PKI/x509, TLS, SSH, GnuPG, OTR, OMEMO, OpenVPN, WireGuard

With more than 15 years of professional experience, I have learned how to build reliable systems that precisely match business requirements. Whether working on small projects that provide a simple solution to an essential problem or contributing as a senior developer and tech lead in large international teams, I combine technical depth with strong organizational skills and a clear focus on delivery.