Felix O.-Cloud Architect
Check rate
Experience
Cloud Engineer
GUS Group
Cloud Journey Kickoff on STACKIT
- Helped the client kickstart their cloud journey on sovereign EU STACKIT platform.
- Bootstrapped IAC & GitOps architecture with Opentofu and ArgoCD.
- Setup platform fundamentals for a fresh, holistic cloud experience: Kubernetes, external secrets, certificate management, gateway API, DNS & routing, observability basics.
Cloud Architect
Schwarz Digits
Industrial Edge Platform / STACKIT – FinOps, DevSecOps, Architecture
- Architected and implemented a centralized FinOps visibility framework, establishing resource tracking and billing for cross-functional, internal clients.
- Slashed cloud infrastructure costs by nearly 50% within the first month by optimizing resource consumption across the CoC-based ArgoCD architecture without compromising performance.
- Implemented Kubernetes tenant isolation with Clastix Capsule (challenge: without Capsule Proxy) and full tenant self-service capabilities on the CLI.
- Implemented DevSecOps best practices to be in accordance with internal security guidelines.
- Executed targeted reviews for large-scale private cloud and industrial edge Kubernetes environments to file comprehensive ADR-styled system evaluations.
Intentional Career Sabbatical
Felix Ortmann
A dedicated period for self-directed learning, exploration, and personal development.
Cloud Architect
uni-assist e.V.
- Project lead ‘Cloud Migration’ for moving the on-premise production environment to Scaleway.
- Transformed a Docker-Swarm legacy setup to a modern Kubernetes-based cloud environment.
- Architected a GDPR-compliant cloud landscape and deployment setup – 100% European sovereign cloud.
- Hands-on bootstrapped the cloud environment with Terraform, ArgoCD, and GitLab Pipelines CI/CD.
- Replaced the legacy VPN with modern mTLS PKI and deep AD integration.
- Managed an 11-headed agile team using Kanban, moderating team meetings and plannings.
- Successfully finished the migration, moving infrastructure, services, and data, from planning to execution.
Cloud Engineer
Stack Stream
- Operated multi-cloud (GCP & AWS) Kubernetes environments using Terraform and ArgoCD.
- Developed and maintained microservices using Golang, Python & React.
- Designed message-passing APIs in a Kafka-based architecture.
Cloud Engineer
Walnut.io
- Re-worked GitHub Actions CI/CD for a 50% speed up shipping an Elixir code base.
- Conducted AWS EKS infrastructure reviews and filed reports for potential improvements.
Site Reliability Engineer
Bundesdruckerei
- Ensured SLOs and SLAs are met for critical German government infrastructure services on OpenShift.
- Filed monthly assessments of the production-readiness on service and project level used for immediate and long term project planning.
- Created Helm libraries for in-house services and implemented CI/CD using GitLab pipelines.
Cloud Engineering, Architecture & Project Leadership
Self-Employed Felix Ortmann
- Holistic distributed systems design, independent of the public cloud provider, with a strong focus on Kubernetes-native setups.
- STACKIT & Scaleway platform engineering.
- Made in EU – European sovereign cloud solutions – Scaleway certified.
- Planning and management for cloud migration projects.
- Cloud architecture bootstraps & reviews.
- DevOps engineering & SRE services.
Blue Team Engineer
Tenzir
- Ideated, built, and maintained Threat Bus, an open-source threat intelligence dissemination layer in Python.
- Designed message-passing APIs for STIX-2 IOC data on various backbones (ZMQ, RabbitMQ, RESTful).
- Accomplished a joint project with a partner company to enable multiple Fortune-500 companies to use our products for retrospective intelligence matching.
- Managed the operation and security monitoring of all computer infrastructures both in-house and on-site with a custom Wireguard mesh.
- Acted as a threat hunter and security analyst in customer networks and filed bi-weekly security reports (shell scripting, CLI).
- Owned the company’s cloud infrastructure on Kubernetes and provided CI/CD via GitHub Actions.
Research Engineer
Fraunhofer Research Singapore
- Conducted scientific research at the Cyber Security department of the Fraunhofer Institute Singapore.
- Generated novel ideas and algorithms and implemented prototypes for:
- Detection of Advanced Persistent Threats in corporate networks (Golang, Python, React).
- IDS alert correlation and Blue Team automation (Python, ElasticSearch).
- Won two prizes for innovative excellence in the Cyber Security industry.
Backend & DevOps Engineer
Moovel Group
- Developed infrastructure as code on AWS to enable urban mobility services in multiple German cities.
- Delivered CI/CD via TeamCity for an AWS service landscape.
- Architected and implemented backend microservices on Node.js.
- Designed RESTful APIs for microservice communication.
Fullstack Engineer
Joblift
- Introduced Kubernetes to the team and handled the adoption when it was first released on GCP.
- Provided and maintained infrastructure as code on GCP and provided CI/CD via Jenkins.
- Implemented and maintained microservices in Java and React.
- Designed RESTful APIs for microservice communication.
Backend Engineer
SinnerSchrader
- Developed web shops using Hybris framework on Linux with Java and Node.js.
Software Engineer
catWorkX
- Plugin development for Atlassian Jira and Confluence using Linux, Java, PHP.
Student Software Engineer
University of Hamburg
- Research project for distributed Petri net execution and simulation using Linux and Java.
Student Assistant
University of Hamburg
- Website administration and campus project maintenance using Linux and Java.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Education, Automotive, Professional Services, and Government and Administration.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Project Management, Product Development, Operations, Research and Development, and Finance.
Summary
Senior Cloud Architect and DevSecOps specialist with over 15 years of experience designing and securing large-scale distributed systems. Proven track record working with and designing Kubernetes landscapes and building GDPR-compliant sovereign cloud platforms.
Focussing on Scaleway and STACKIT – EU-scoped, modern cloud providers – for the past 4 years, closing the gap towards EU sovereignty.
Experience working in public sector and government grade security contexts. Strong background in threat detection, Zero Trust architecture, and high-performance CI/CD systems. Solid academic foundation with best-in-class master degree (1.0) and award winner for innovative threat detection algorithms at the Fraunhofer Institute Singapore.
Skills
Kubernetes, Docker, Helm, Argocd, Openshift, Scaleway, Aws, Gcp – 10+ Years
Terraform, Gitlab Pipelines, Github Actions, Pulumi – 5+ Years
Nginx, Iam, Grafana, Monitoring, Mtls, Pki, Vpn, Keycloak, Oauth – 10+ Years
Arch Linux, Shell-Scripting, Python, Node.Js, Golang, Java/Kotlin, Distributed (Micro-)Service Architectures – 15+ Years
Languages
Education
Nanyang Technological University
Masters · Cyber Security · Singapore · 1.0
University of Hamburg
Master of Science · Computer Science · Hamburg, Germany · 1.0
University of Hamburg
Bachelor of Science · Computer Science · Hamburg, Germany
Certifications & licenses
Scaleway Cloud Certified – Kubernetes
Scaleway Cloud Certified – Foundations
Scaleway Cloud Certified – Network
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Felix is based in Hamburg, Germany.
Felix speaks the following languages: German (Native), English (Advanced).
Felix has at least 14 years of experience. During this time, Felix has worked in at least 13 different roles and for 15 different companies. The average length of individual experience is 1 year and 11 months. Note that Felix may not have shared all experience and actually has more experience.
Based on recent experience, Felix would be well-suited for roles such as: Cloud Engineer, Cloud Architect, Intentional Career Sabbatical.
Felix's most recent position is Cloud Engineer at GUS Group.
In recent years, Felix has worked for GUS Group, Schwarz Digits, Felix Ortmann, uni-assist e.V., and Stack Stream.
Felix is most experienced in industries like Information Technology, Education, and Automotive. Felix also has some experience in Professional Services and Government and Administration.
Felix is most experienced in business areas like Information Technology, Project Management, and Product Development. Felix also has some experience in Operations, Research and Development, and Finance.
Felix has recently worked in industries like Information Technology, Education, and Government and Administration.
Felix has recently worked in business areas like Information Technology, Project Management, and Operations.
Felix holds a Master in Cyber Security from Nanyang Technological University, a Master in Computer Science from University of Hamburg and a Bachelor in Computer Science from University of Hamburg.
Felix has 3 certificates. These include: Scaleway Cloud Certified – Kubernetes, Scaleway Cloud Certified – Foundations, and Scaleway Cloud Certified – Network.
Felix will be available from December 2026.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 16 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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