Delix J.

Key Skills

Software

Mindrift

Data Annotation Tech

Top Subject Matter

LLM response evaluation

safety and factuality checking

NLP sentiment

Top Data Types

Text

Audio

Top Task Types

RLHF

Freelancer Overview

AI Data Trainer / RLHF Evaluator (Mindrift). Core strengths include Mindrift and Data Annotation Tech. Education includes Bachelor of Science, Egerton University. AI-training focus includes data types such as Text and labeling workflows including RLHF and Entity (NER).

Labeling Experience

AI Data Trainer / RLHF Evaluator (Mindrift)

MindriftTextRLHF

Performed RLHF evaluation by reviewing and ranking AI-generated responses for quality, accuracy, and safety. Identified and flagged harmful, biased, or factually incorrect outputs according to project guidelines. • Evaluated responses across three tasks per week • Maintained a 95% quality score • Wrote high-quality prompts and ideal responses to support supervised fine-tuning • Collaborated asynchronously with QA teams to meet deadlines

2026 - Present

Data Annotator — NLP Tasks (DataAnnotation.tech)

Data Annotation TechText

Completed NLP data annotation for machine learning pipelines including sentiment analysis, entity recognition, and intent classification. Ensured high annotation consistency with multi-week projects and supported guideline improvements using domain expertise. • Labeled text, images, and audio datasets for NLP tasks • Achieved over 94% inter-annotator agreement • Contributed technical writing expertise to labeling guidelines • Supported onboarding materials for annotators

2025 - 2025

Education

Work History