Freelancer profile translated to English.

Description

I have been working in the digital ecosystem for over 20 years — from social media and data annotation to AI security and automation. Today, my focus is on what truly drives me: testing AI systems for vulnerabilities before others do.

As the founder of stress-test.net, I conduct independent red teaming audits and EU AI Act compliance checks. As CTO at Telefon-Geselle.de, I am simultaneously building productive AI infrastructure — so I know both sides: attack and build.

I am not a theoretician. I have spent years hands-on testing LLMs adversarially, developing jailbreaks, and co-designing safety guardrails. What I deliver has substance.

Languages

German
Native or bilingual
English
Fluent
French
Basic

Workplace preferences

Can work on-site

Berlin (up to 20km)

Telefon-Geselle.de
Chief Technical Officer / AI Operations Manager
E-COMMERCE
February 2026 - Today (4 months)
Berlin, Germany
• Conception and rollout of an end-to-end AI infrastructure for voice agents with Retell and n8n for workflow orchestration
• Significant latency reduction by 30% through optimization of API calls and prompt structure
• Automation of recurring customer inquiries with significantly reduced manual processing time per ticket and additional scaling capacity
AI Automation Prompt engineering LLM Cybersecurity
Stress-Test.Net
Founder
CONSULTING AND AUDITS
January 2026 - Today (5 months)
Berlin, Germany
AI Safety Audits | EU AI Act Compliance

Independent AI security audits and EU AI Act compliance checks for companies — from rapid red teaming to enterprise audits according to Annex IV and Article 15.
EU AI Act Red Team Cybersecurity
Mercor
AI Red Teaming & AI Generalist
DIGITAL AND IT
March 2026 - Today (3 months)
Development and annotation of high-quality evaluation data for LLM training — focus on prompt quality, rubric design, and adversarial testing in German-speaking countries.
LLM Prompt engineering