Tomas Stiller - Co-Founder & CTO

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Munich, Germany

Experience

Jan 2018 - Jun 2023

5 years 6 months

Co-Founder & CTO

Printkiss GmbH & Co. KG

Cloud architecture and development on AWS, Docker & Hetzner Cloud.
Setup and operation of the GitLab CI/CD pipeline.
Frontend and backend development in Magento 2.
Linux, PostgreSQL
GitLab CI/CD
PHP, React, JavaScript, HTML, CSS
SEO

Jan 2016 - Present

9 years 7 months

Munich, Germany

Founder & Consultant

Stillforward GmbH

IT consulting agency focusing on AWS, K8s, DevOps and platform engineering.
Development and operation of a platform for Kubernetes and cloud architectures at a national leader in transportation (11.2022 - present) - AWS and Crossplane with K8s, GitLab CI, ArgoCD - development of Compositions and Composition Functions with Golang.
Cloud architectures, DevOps, platform engineering
AWS, Crossplane, Kubernetes
GitLab CI/CD, ArgoCD, Terraform
SAFe, Scrum / agile methods
LLMs, AI agents
Gatekeeper
Golang, Angular, TypeScript, React, CSS, HTML
Linux, Docker, EKS
Individual consulting projects
Extending role-based access for K8s (06.-07.2025)
Revision and implementation of an extended role concept for the K8s API based on RBAC.
API users can implement use cases for cost optimization and stabilizing the running services.
Technologies: Golang, K8s, YAML, RBAC, REST API.
Release Manager (02.-07.2025)
Rolling out the internal developer platform, coordinating the test process, and evolving unit and E2E tests.
Stable rollout of new K8s API versions for 25+ EKS clusters.
Minimizing downtime.
Increasing customer satisfaction by reducing breaking changes.
Technologies: Golang, K8s, YAML, RBAC, REST API.
Setting up an AI infrastructure for AI agents with RAG (06.2025)
Creating an infrastructure to host an in-house LLM and setting up an AI agent.
Designing a workshop with a hands-on part.
Technologies: AWS EKS, Terraform, Flowise, LangChain, Karpenter.
Developing an alternative access concept for K8s (10.2024-03.2025)
Ensuring data protection and compliance while expanding the general access concept.
API users can now flexibly implement extended use cases that they did not have rights for before.
Technologies: Gatekeeper, Rego policies, K8s, RBAC, REST API, EKS.
Second level support and tool development for the internal developer platform (01.2023-12.2024)
Training users and supporting problem solving for various infrastructure projects.
Ensuring smooth operations.
Technologies: CI/CD, ArgoCD, GitOps, AWS, EKS, Crossplane, Golang, Python.
Moderation and presentation of content in a SIG (09.2024)
Preparing training materials and presenting to 60+ people.
Good adoption of the developed solutions by clients.
Development of the Sporteamate app (01.-12.2022)
From concept to go-live: implementation of the full Sporteamate app.
An app in the Play and App Store as well as a PWA with paying customers.
Technologies: Ionic, Angular, TypeScript, MongoDB.

Jan 2008 - Dec 2016

9 years

Co-Founder & CTO (Exit)

Wunderkarten GmbH

Architecture and setup of an auto-scaling AWS EC2 environment.
Development of a PHP-based shop system.
Development of a map designer (vanilla JavaScript).
Building and leading the IT department.
Introduction of agile methods.
Cloud architectures, DevOps, Platform Engineer
ALB, RDS, ElastiCache, EC2, EFS, IAM, Route 53, CloudFront
Linux, Bash, MySQL
Jenkins, PHP, JavaScript, HTML, CSS
SEO

Summary

Since 2010, I have been designing and developing high-performance, highly available cloud architectures. With AWS, Kubernetes and AI, I'm always looking for new, exciting technologies.