Hi 👋🏼 my name is Jan Larwig

Coder, Open Sourcerer, Teacher

I’m a Staff Platform Engineer with a passion for open source, learning and teaching. I’ve been coding and tinkering for over 17 years and love to share my knowledge about software architecture and design.

I’m mostly focused on building tools and internal development platforms for enabling others.

My language of choice is Go and a healthy sprinkle of Bash scripting. Other than that, I’ve used quite a mixed bunch of languages over the years. You could say I’m a coding polyglot, ranging over all the major C flavours (C++, C#, C), Java, TypeScript, Python, Shell, PHP and Ruby.

What I used so far

Cloud native

Automation & IaC

Programming languages

Databases

Cloud infrastructure providers

Tooling

Practices

Operating systems

Hands-on Experience

Staff Platform Engineer - IONOS (Sep 2024 - Present)

Building the Sovereign Cloud for Germany. Working on the cross-functional integration of all core systems of the IONOS Cloud airgapped offering. From the bare metal infrastructure up to the PaaS products.

The story begins with automation of bare metal server configuration and automation, leading to classic core systems like NTP, DNS, and FTP, over to modern infrastructure automation with Kubernetes, ClusterAPI and GitOps with ArgoCD. Furthermore, taking part in on-call rotations and coordinating efforts to minimize risk, ensuring stability and teaching and mentoring other engineers in the field.

Contributor & Maintainer - OAuth2 Proxy (Dec 2022 - Present)

As a core maintainer of OAuth2 Proxy, I lead releases, triage and fix security issues. Review & merge PRs. Ship features across OIDC providers and proxy/middleware integrations. I focus on auth correctness, reliability, and automation.

Senior DevOps Engineer - Capgemini (Apr 2022 - Aug 2024)

Cloud Tech Lead for cross-agency platform teams, delivering secure, sovereign cloud infrastructure under tight deadlines.

  1. Built an Internal Development Platform for 100+ developers (from 5 companies) by architecting the K8s, CloudSQL, and CI/CD toolchains in 5 months

  2. Enabled a small government project with 15 developers by deploying a development platform and a production-grade IONOS Cloud environment with a lean team of 2 engineers in a couple of weeks

  3. Modernized a critical government system by designing custom Container images and CI/CD/QA pipelines for an OpenShift based landscape, reducing built and deployment times between 20-70%

Devops Engineer Lead - Capgemini (Oct 2020 - Apr 2022)

DevOps lead specialized in external systems integration, microservices transformation and Toolchain management. (CI,CD,QA)

Spearheading two major third-party APIs migrations from v1 to v2, achieving a seamless transitions without interruptions.

Ensured uptime for an Internal Developer Platform (IDP) supporting 60+ engineers by implementing extensive monitoring (Prometheus & Grafana Alerts), automated failover and a self service portal for deployments and development databases in a complex B2B environment.

DevOps Engineer - Capgemini (Jun 2019 - Oct 2020)

Decoupled mission-critical sales document generation for one of Germanies largest automotive OEMs from a monolithic architecture into cloud-native microservices, cutting deployment time down from 6 months to 3 weeks.

Software Engineer - SPEE3D (Jan 2019 - Apr 2019)

Redesigning and implementing a modern, interactive 3D interface for SPEE3D’s metal 3D printer with Unity.

Development of a conversion tool from a voxel space simulation output into a triangulated 3d mesh for massively reducing the storage and bandwidth usage.