JM

Jessica Marie Hofmann

Available to hire

AI Data Trainer & Quality Analyst, as well as social media content manager!

About

AI Data Trainer & Quality Analyst, as well as social media content manager!

  • 5 years' experience
  • Joined June 2026

Languages

  • GermanFluent
  • EnglishFluent
  • KoreanIntermediate
  • FrenchBeginner

Industry experience

  • Education
  • Retail
  • Media & Entertainment
  • Software & Internet
  • Professional Services

Work experience· 8 roles

Multilingual Quality Analyst (German) · Invisible TechnologiesJan 2025 – Present · 1 yr 11 mos

Reviewed agents’ ratings and justifications to ensure accuracy, consistency and guideline compliance. Validated explanations against evidence and flagged errors for review. Improved QC score across the team from approximately 60% to over 90% within 2 months through detailed, targeted feedback and general guidance.

Advanced Multilingual AI Data Trainer (German) · Invisible TechnologiesApr 2024 – Dec 2024 · 9 mos

Applied RLHF and SFT training methods to improve model outputs while maintaining a score average above 99%. Created and refined German language prompts and preambles for creative and business-oriented use cases. Identified and labeled contextual, factual, linguistic and reasoning errors according to detailed quality guidelines. Compared and corrected model answers to improve training data quality and reduce error patterns.

Account Manager · Straight Up AgencyDec 2023 – Nov 2025 · 2 yrs

Optimized content calendars for 10+ clients in preparation for TikTok Shop. Guided content creators on setup, planning and strategy. Planned and created content pieces, elevating engagement across several social media platforms. Analyzed and optimized social ad performance.

Intern in Mobile Experience – Retail Marketing · Samsung Electronics GmbHMay 2022 – Oct 2022 · 6 mos
Office Services Assistant · Dr. Sasse GmbHSep 2021 – Apr 2022 · 8 mos
English Teacher · Private Pre-School in Seoul, South KoreaNov 2019 – Apr 2020 · 6 mos
Sales Assistant · Flying Tiger CopenhagenOct 2017 – May 2018 · 8 mos
Catering Service Assistant · Asia WokFeb 2015 – Sep 2015 · 8 mos

Education

Master of Science in Business Psychology · FernUniversität in Hagen2025 – 2026
Bachelor of Arts in International Business Administration, Marketing · Frankfurt University of Applied Sciences2018 – 2023
Study Abroad Program · Sungkyunkwan University2019 – 2020
High School Diploma · Spessart Gymnasium Alzenau2009 – 2017

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