WALTER SEYFARTH
Junior Recruiter, Quality Analyst Professional, Al Researcher,
Advanced Al Data Trainer-Lima, Peru
linkedin.com/in/walterseyfarth/
SUMMARY
Detail-oriented Al Data Trainer and QA professional with hands-on experience in video captioning, NLP data
curation, and software validation. Proven track record of enhancing Al model performance through structured
dataset refinement and adherence to quality assurance best practices. Skilled in performance evaluation,
supporting training initiatives, and managing high-quality pipelines in remote, global environments. Currently
pursuing HRCI certification to deepen expertise in human resources. Fluent in Spanish, English (C2), and
German (C1).
EXPERIENCE
Advanced Al Data Trainer, Invisible Technologies
Clients: OpenAI, AWS, Microsoft
Curated, annotated, and validated NLP and video data for high- performing Al
systems
Developed structured datasets ensuring accuracy, relevance, and ethical
standards
Conducted rigorous quality reviews and model evaluation for performance
improvement
Collaborated with cross-functional teams to implement feedback loops for model
refinement
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05/2024 – 04/2025
California,
United States
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Creative Collaborator, XPropelr
Collaborated on multimedia and anti-modern slavery campaigns
Focused on impactful communication strategies
2024 – Present
Australia
Freelance Composer, Freelance
Composed original scores for short films, multimedia, and digital media
platforms
Integrated thematic sound design with narrative cues in visual storytelling
2023 – Present
Worldwide
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Private Piano Teacher, Freelance
Provided individual piano instruction to beginner and intermediate students
Designed lesson plans tailored to skill development and musical theory
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2018 – 2023
Lima, Peru
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EDUCATION
Bachelor of Music - Composition for Film and Media, Universidad de los Andes
2018 – 2024
Colombia
CERTIFICATES
Foundations of Software
Testing and Validation,
University of Leeds
Talent Acquisition, Human
Resource Certification Institute
(HRCI)
SKILLS
AWS
Creative Thinking
Google Workspace
JIRA
LMS
NLP
Photoshop
Trello
Illustrator
Gmail
AI
Soft Skills
Data Entry
LANGUAGES
English
Proficient
German
Advanced
Spanish
Native
