Tomas Stiller
Co-Founder & CTO
Experience
Co-Founder & CTO
Printkiss GmbH & Co. KG
- Agile app development and product ownership in e-commerce
- Feature planning and creating user stories
- Organizing external freelancers (cross-functional teams)
- Backend and frontend development
- Story mapping
- Backlog management
- Roadmap planning
- Budget control and capacity planning
Co-Founder & CTO
Wunderkarten GmbH
- Designing and operating a scalable AWS infrastructure (EC2, ALB, RDS, S3, EFS, IAM, CloudFront)
- Developing a custom PHP-based e-commerce system including a real-time card designer (Vanilla JavaScript)
- Building and leading an 11-person development team using agile methods
- Introducing DevOps automation (Jenkins, CI/CD pipelines) and improving deployment reliability
- Responsible for SEO strategy and website performance optimization
Founder & Consultant
Stillforward GmbH
Building and operating a Kubernetes-based internal developer platform for over 25 AWS EKS clusters
Developing Crossplane compositions and composition functions in Golang
Managing secure rollouts of new Kubernetes APIs with release coordination and a testing strategy
Implementing secure RBAC models and policy enforcement with Gatekeeper and Rego
Providing second-level support and platform tooling for internal teams
Conducting knowledge-sharing sessions (e.g., SIG moderation, platform onboarding)
Developing an AI infrastructure prototype with LangChain, Flowise, Terraform, and AWS EKS
Implementing retrieval-augmented generation (RAG) pipelines with private LLMs and vector databases
Completed a professional course in AI agent design and orchestration (LangChain & LLMs, 2025)
Conducting internal workshops and knowledge transfers on AI tooling and architectural fundamentals
Summary
Over 15 years of experience building scalable cloud platforms and leading tech-driven companies. As a founder and consultant, I helped businesses modernize their infrastructure, establish a DevOps culture, and integrate AI-powered solutions. Successes with AWS, Kubernetes, Golang, and AI agent platforms across transport, e-commerce, and platform engineering.
I specialize in building AI-driven systems that deliver real value. From custom LLM workflows and agent infrastructures to retrieval-based architectures, I turn AI from a buzzword into working solutions. My strength lies in combining deep cloud expertise (AWS, Kubernetes, Golang) with hands-on AI implementation to create scalable, intelligent platforms. I also design, develop, and operate these platforms while sharing my knowledge about them.
Skills
- Ai Platforms & Tools: Flowise, Langchain, Hugging Face, Ollama, Openai
- Cloud: Aws (Eks, Ec2, S3, Iam, Route53, Rds, Cloudfront)
- Kubernetes & Gitops: Argocd, Helm, Karpenter, Crossplane
- Iac & Devops: Gitlab Ci/cd, Docker, Terraform, Linux
- Programming: Golang, Typescript, Python, Php
- Ai Infrastructure Engineering
- Developer Enablement & Ai Onboarding Workshops
- Retrieval-augmented Generation
- Lean Ai Prototyping & Mvp Development
- Technical Leadership Of Platform Projects
- Integration Of Ai Agents Into Cloud-native Applications
- Ux-centered Ai Tools & Prompt Design
- Lean Ux & Ux Research
- Startup Execution & Product-market Fit For Ai Tools
- Cloud-native Architecture With Aws, Kubernetes & Golang
- Platform Engineering With Gitops & Crossplane
- Secure Api Design With Rbac, Gatekeeper, Rego Policies
- Fullstack Web Development: React, Angular, Typescript, Html/css
- Strategic Thinking With A Strong Sense For Ai Systems
- Practical Leadership With An Engineering-first Mindset
- Clear, Technical Communication Across Disciplines
- Problem Solving Through Experimentation And Iterative Approaches
- Driven By Curiosity, Autonomy, And The Desire For Tangible Impact
Languages
Education
Karlsruhe Institute of Technology (KIT), University of Karlsruhe (TH)
Diploma in Computer Science · Computer Science · Karlsruhe, Germany
Certifications & licenses
AI Agents: LangChain & LLM Apps
AI For Everyone
Coursera
MS Certified: Azure AI Fundamentals
ArgoCD Essentials
Udemy
Certified Kubernetes Administrator
Linux
Node JS - The Complete Guide
Udemy
Similar Freelancers
Discover other experts with similar qualifications and experience
Cloud (AWS) | AI | DevOps | Data
MLOps (machine learning operations)
Senior MLOps, DevOps Engineer
Team Lead – Engagement & Relevance
Fractional CTO (Principal Engineer / Technical Architect)
AR/VR/XR Architect
Senior Software Engineer
Solution Architect / Senior Manager – DTC E-Commerce Platform
Senior Software Architect
Senior Cloud Consultant and Developer
Backend/Frontend Developer
Kubernetes Expert | Google Cloud Platform Engineer
Head of Engineering - Midnight
Embedded Fullstack Developer
Solution Manager for PoC investigation and replacement and refinement of an existing cloud and IoT power plant control system
DevOps and Cloud Engineer
Backend Python Engineer
Freelancer, Solution Architect
Freelance Lead DevOps Engineer
DevOps
Senior Security Devops Engineer
Senior DevOps Consultant (Freelance)
Cloud Architect
Director Engineering & Technology
Head of Technical Overall Integration NSC / Hadoop Cloud Development
Freelance IT Consultant/Advisor
DevOps Engineer
Vice President Technology
DevOps Engineer in the DevOps Team
