Kasper Juhani
Kouvola,Kymenlaakso
Summary
AI Annotation Specialist with 5+ years of experience in evaluating and refining AI outputs. Proven expertise in linguistic accuracy and data quality assurance, enhancing AI models effectively. Proficient in managing complex multilingual content while meeting strict quality standards and deadlines. Background in Computer Science and Data Analytics, with bilingual proficiency in Finnish and English.
Overview
6
6
years of professional experience
5
5
years of post-secondary education
1
1
Certification
Work history
AI Annotation Specialist
UPWORK
Helsinki
04.2022 - 11.2025
- Evaluated over 15,000 AI-generated responses across multiple quality dimensions, achieving 98% accuracy.
- Assessed 3,500 natural language outputs monthly for linguistic accuracy and alignment with user intent, exceeding quality benchmarks by 15%.
- Identified and categorised over 2,000 instances of translation errors and safety issues, improving AI model performance metrics by 25%.
- Provided structured feedback and rationale for over 12,000 ratings, enhancing context understanding by 30%.
- Maintained 99.5% consistency rate in high-volume annotation environments, processing over 500 tasks weekly.
- Leveraged linguistic expertise to assess over 8,000 complex prompts across 12 global AI use cases.
- Conducted over 150 AI safety audits and reduced safety incidents by 40% through rigorous evaluations.
- Collaborated on over 50 data quality assurance initiatives, improving team efficiency by 35%.
- Optimized resource allocation for maximized operational efficiency.
Annotator
Hitech BPO
Helsinki
03.2020 - 02.2022
- Annotated and categorized over 20,000 short-form texts for toxicity detection, ensuring compliance with project guidelines.
- Labeled 10,000+ text snippets for intent classification, adhering to strict client standards.
- Performed semantic annotation on 500+ social media posts, maintaining consistency across daily annotations.
- Tagged named entities in 15,000+ news articles, achieving 95% quality score in audits.
- Classified user-generated reviews for e-commerce platform, processing over 200 texts daily with high precision.
- Provided part-of-speech tagging for 12,000 academic sentences, sustaining error rates below 2%.
- Annotated dialogue datasets for virtual assistant project, emphasizing conversational context and cultural nuances.
- Categorized 8,000+ customer inquiries for financial AI model under tight deadlines.
Education
Master of Science (M.S.) - Data Analytics
Carnegie Mellon University
USA 10.2023 - 03.2025
Bachelor of Science (B.S.) - Computer Science
University of Helsinki
Helsinki, Finland 10.2013 - 07.2017
Skills
- AI evaluation and rating
- Linguistic analysis
- Data annotation and labeling
- AI safety audits
- Machine learning optimization
- Multi-language assessment
- Structured feedback and documentation
- Microsoft Office proficiency
- Digital marketing analytics
LANGUAGES
6,6
Certification
- Data Annotation for AI | DY Patil Institute of Technology, 2022
- Machine Learning Fundamentals | Coursera, 2023
- Natural Language Processing Specialization | DeepLearning.AI, 2023
- Data Quality Management | LinkedIn Learning, 2024
- AI Ethics and Responsible AI Development | MIT Professional Education, 2024
LANGUAGES
Finnish
Native
English
Fluent
Timeline
Master of Science (M.S.) - Data Analytics
Carnegie Mellon University
10.2023 - 03.2025
AI Annotation Specialist
UPWORK
04.2022 - 11.2025
Annotator
Hitech BPO
03.2020 - 02.2022
Bachelor of Science (B.S.) - Computer Science
University of Helsinki
10.2013 - 07.2017