Hi, I’m Felix Scholz, a German freelancer specializing in AI data training and voice acting. Since 2024 I’ve worked with clients like Invisible, Outlier, Alignerr and Babel.audio, focusing on LLM data preparation in German, RLHF tasks, prompt engineering, and audiobook data training, as well as podcast hosting and German voice acting for user and AI interactions. I work from my home studio in Gävle, Sweden, and I’m fluent in German and English, with advanced Swedish and intermediate Spanish. My background includes studies in languages and teaching, and civil engineering. I have hands-on experience with audio editing (Audacity, Adobe Audition), video editing (DaVinci Resolve, CapCut), web tools (WordPress), and AI data labeling. I enjoy creating engaging content such as children’s audiobooks and podcasts, and I’m passionate about delivering high-quality data and voice performances for AI systems.

Felix Scholz

Hi, I’m Felix Scholz, a German freelancer specializing in AI data training and voice acting. Since 2024 I’ve worked with clients like Invisible, Outlier, Alignerr and Babel.audio, focusing on LLM data preparation in German, RLHF tasks, prompt engineering, and audiobook data training, as well as podcast hosting and German voice acting for user and AI interactions. I work from my home studio in Gävle, Sweden, and I’m fluent in German and English, with advanced Swedish and intermediate Spanish. My background includes studies in languages and teaching, and civil engineering. I have hands-on experience with audio editing (Audacity, Adobe Audition), video editing (DaVinci Resolve, CapCut), web tools (WordPress), and AI data labeling. I enjoy creating engaging content such as children’s audiobooks and podcasts, and I’m passionate about delivering high-quality data and voice performances for AI systems.

Available to hire

Hi, I’m Felix Scholz, a German freelancer specializing in AI data training and voice acting. Since 2024 I’ve worked with clients like Invisible, Outlier, Alignerr and Babel.audio, focusing on LLM data preparation in German, RLHF tasks, prompt engineering, and audiobook data training, as well as podcast hosting and German voice acting for user and AI interactions.

I work from my home studio in Gävle, Sweden, and I’m fluent in German and English, with advanced Swedish and intermediate Spanish. My background includes studies in languages and teaching, and civil engineering. I have hands-on experience with audio editing (Audacity, Adobe Audition), video editing (DaVinci Resolve, CapCut), web tools (WordPress), and AI data labeling. I enjoy creating engaging content such as children’s audiobooks and podcasts, and I’m passionate about delivering high-quality data and voice performances for AI systems.

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Language

German
Fluent
English
Fluent
Swedish
Advanced
Spanish; Castilian
Intermediate

Work Experience

Freelance AI Data Trainer / Voice Acting at Babel.audio
September 1, 2025 - Present
Podcast acting, host and guest; Voice acting as user and ai assistant in German
AI Data Trainer / Prompt Engineer at Alignerr
January 1, 2025 - Present
LLM data training in German / prompt engineering; RLHF: prompt writing, response rating & selection; Prompt fact checking; AI bot character rating; Audiobook AI data training in German (voice acting)
AI Data Trainer at Outlier
November 1, 2024 - Present
LLM data training for German (RLHF: response rating, justification writing); Voice assistant data training (German voice acting & quality control); Conversation recording project
AI Data Trainer / Prompt Engineer at Invisible
April 1, 2024 - Present
LLM data training for German / prompt engineering; RLHF: response rating, response selection, justification, quality analysis of other prompt engineers; SFT tasks (fact-checking, conversation writing, error labelling, response selection, creating ideal guideline-compliant responses); Image rating (pass/fail; major error detection); Translation rating & justification (EN → DE); PSII Annotation in English

Education

Advanced training for recruiters at HSB-Akademie Leipzig, Germany
January 1, 2022 - January 1, 2022
Foreign language correspondent (English, Spanish) - Vocational degree at Euro Akademie Aschaffenburg, Germany
January 1, 2020 - January 1, 2021
Studies of teaching (mathematics and sport) at TU Kaiserslautern, Germany
January 1, 2014 - January 1, 2019
Civil engineering at TU Kaiserslautern, Germany
January 1, 2009 - January 1, 2014

Qualifications

Latin (Latinum certificate)
January 11, 2030 - January 9, 2026

Industry Experience

Media & Entertainment, Professional Services, Software & Internet, Education