Bartosz Łogin - AI Data Annotator & Content Evaluator (Freelance)

Key Skills

Software

Label Studio

Labelbox

Scale AI

Remotasks

Toloka

Appen

Top Subject Matter

LLM response evaluation

search relevance

intent classification

Top Data Types

Text

Image

Document

Top Task Types

Classification

Entity Ner Classification

Text Generation

Question Answering

Text Summarization

Fine Tuning

Red Teaming

Data Collection

Freelancer Overview

I have been working in AI data annotation and content evaluation for over 4 years, focusing mainly on assessing AI-generated text, rating search results, and comparing model outputs in RLHF-style tasks. On a daily basis I work with GPT-4o, Claude, Gemini, Grok and Perplexity, which gave me a solid practical understanding of how these models behave, where they fail, and what good output actually looks like. I annotate in three languages: Polish (native), English (B2/C1) and German (A2/B1), across content types ranging from legal and technical documents to commercial and conversational text. Beyond annotation itself, I also build my own tools in Python to handle repetitive parts of the workflow, including OCR pipelines, API integrations and data processing scripts. This hands-on technical background helps me understand the data side of AI projects, not just the labeling side. I have a strong track record of sticking to guidelines even on complex or ambiguous tasks, keeping consistency above 95% across projects, and delivering everything on time. My experience reviewing legal documents and handling structured written disputes trained me to read instructions carefully and apply them precisely, which I find directly useful in high-stakes annotation work.

ExpertPolishGermanEnglish

Labeling Experience

AI Data Annotator & Content Evaluator (Freelance)

Text

As an AI Data Annotator & Content Evaluator (Freelance), I evaluated AI-generated text responses, performed RLHF-style ranking, and conducted search relevance and intent annotation in Polish, English, and German. I applied structured guidelines for multilingual annotation, content moderation, and legal/technical/commercial document review. I developed annotation automation tools in Python and maintained detailed logs with high quality and consistency. • Evaluated 1,000+ AI-generated text outputs for factuality, tone, and appropriateness. • Performed RLHF comparative task, sentiment analysis, intent labeling, and NER annotation. • Conducted search relevance and SERP rating for Polish and English markets. • Handled content moderation, bias detection, and multilingual document annotation across legal and business domains.

2021 - Present

Education

W

Wyzsza Szkola Informatyki

Bachelor of Science, Management and Business Administration

Bachelor of Science

2013 - 2016

Z

Zespol Szkol Lacznosci im. Sylwestra Kaliskiego

High School Diploma, Electronics

High School Diploma

2000 - 2004

Work History

C

Castorama

Retail Sales Advisor

Lodz

2019 - Present

M

Multicontract

Regional Sales Manager / Business Owner

N/A

2005 - 2019