Below is the showcase of my video portfolio.
https://vimeo.com/showcase/12242832?fl=so&fe=fs
- Content Creator
- Copywriter
- Video Editor
- +2
Insoo Jeong
- Seoul, South Korea
- 1 project
I’m Insoo Jeong, a freelance translator based in Seoul with 30+ years of experience supporting global marketing and multilingual communication.
About
I’m Insoo Jeong, a freelance translator based in Seoul with 30+ years of experience supporting global marketing and multilingual communication. I specialize in video translation and subtitling, adapting voice-over content so it lands naturally with international audiences across marketing, e-learning, and technical materials.
Alongside multimedia localization, I’ve worked for years on AI-driven language data projects, including structured annotation and evaluation workflows for speech and LLM-related work. I also bring a strong consulting background—supporting Korean SMEs expanding globally with compliance, ISO-related guidance, and cybersecurity-focused training—while continuously exploring new AI tools to improve quality, speed, and scalability.
- Joined March 2026
Industry experience
- Media & Entertainment
- Software & Internet
- Education
- Professional Services
- Other
Projects · 1
Work experience· 11 roles
AI Annotation & Language Data Projects (Data Collection, Annotation, Evaluation) · DeepL and other global tech firms (including Google)Jan 2022 – Present · 4 yrs 11 mos
Perform data collection, annotation, and evaluation services for AI language/speech projects. Collaborate with global technology companies on audio and speech-related AI work. Contribute to training and refinement of LLMs and voice models using structured annotation workflows. Follow quality assurance protocols to ensure accuracy and reliability of AI-generated linguistic data.
AI Annotation & Language Data Services Provider · DeepL (and collaborations with Google and other tech firms)Jan 2022 – Present · 4 yrs 11 mos
Provided data collection, annotation, and evaluation services for DeepL starting in 2022. Collaborated with Google and other global tech firms on audio and speech-related AI projects, contributing to structured annotation workflows that help train and refine LLMs and voice models. Performed work aligned with quality assurance protocols for AI-generated linguistic data.
Data Collection, Annotation & Evaluation (AI Language Data Projects) · DeepL (and other global tech firms)Jan 2022 – Present · 4 yrs 11 mos
Provided data collection, annotation, and evaluation services to DeepL since 2022. Collaborated with Google and other global tech firms on audio and speech-related AI projects. Contributed to training and refining LLMs and voice models through structured annotation workflows, with strong attention to quality assurance protocols for AI-generated linguistic data.
AI Annotation & Language Data Specialist · Self-employedJan 2022 – Present · 4 yrs 11 mos
AI Annotation & Language Data Projects · Self-employedJan 2022 – Present · 4 yrs 11 mos
Freelance Translator (Multimedia Localization & Video Production) · Self-employedJan 2017 – Present · 9 yrs 11 mos
Freelance Translator / Multimedia Localization & Video Production · Self-employedJan 2017 – Present · 9 yrs 11 mos
Freelance Translator · Self-employedJan 2017 – Present · 9 yrs 11 mos
Education
Bachelor of Science in Chemical Engineering · Yonsei University1976 – 1980
Translator Certificate · International Interpretation & Translation Association of Korea2030 – 2026
Certifications and awards
Translator Certificate – International Interpretation & Translation Association of Korea2018 – 2026
ProZ.com Certified Pro2030 – 2026
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