JAN
KLATTENHOFF.
Building backend systems by day and breaking infrastructure at home by night. Open to new opportunities.
"Backend Systems
PHP and Symfony day-to-day — Doctrine ORM, PostgreSQL, REST APIs, unit and integration tests. Clean, maintainable code that ships.
CI/CD & DevOps
GitLab CI/CD and GitHub Actions pipelines with automated testing and linting. Docker-based deployments from day one.
Self-hosted Infra
Proxmox on own hardware. Forgejo, mail server, reverse proxy — built, broken, and rebuilt correctly. Next up: Kubernetes done right.
Projects
Selected Archive 2023–2026
Dailies Webapp
Symfony webapp for a large admin team to run daily standups more efficiently. Microsoft Teams API integration for live online status and automated email notifications.
TankApp ↗
SaaS webapp for comparing fuel prices across Germany — interactive map, real-time prices via Tankerkönig API, and a full Stripe subscription model (Free / Plus / Pro).
Burger Shop
First Scrum project — full Symfony e-commerce app with GitLab CI/CD and a Deployer PHP deployment pipeline to a Linux server.
Self-hosted Infra ↗
Proxmox on own hardware — Forgejo instance, mail server, and various services behind a reverse proxy with GitHub Actions-style CI/CD.
Tech I Work With
CLEAN
CODE.
REAL
IMPACT.
I don't just write code that works — I care about the pipeline that builds it, the tests that verify it, and the infrastructure that runs it. Repetitive work with no learning curve isn't my style. Give me a challenge that actually teaches something.
Ship Real Things
Production apps with CI/CD pipelines, not toy projects.
Own the Stack
From code to container to server — I want to understand it all.
READY TO
BUILD?
Open to opportunities in backend development, DevOps, and infrastructure engineering. Let's make something worth shipping.