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A

Artjom Jekimtsev

AI Data Trainer & Prompt Engineer (ex CEO)

UNITED_KINGDOM flag
London, United Kingdom
$44.00/hrIntermediateMercor

Key Skills

Software

MercorMercor

Top Subject Matter

AI Training & RLHF
AI Evaluation
Prompt Engineering

Top Data Types

TextText
ImageImage

Top Task Types

Text Generation
Question Answering
RLHF
Red Teaming
Data Collection
Prompt Response Writing SFT
Segmentation
Classification

Freelancer Overview

Prompt Writer & Rubric Designer | Project Pavilion (Contractor). Brings 14+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Internal and Proprietary Tooling. Education includes Bachelor of Science, University of Greenwich (2016) and A-Levels, Ealing, Hammersmith and West London College (2013). AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

IntermediateEnglish

Labeling Experience

Prompt Writer & Rubric Designer | Project Pavilion (Contractor)

Text
Authored deep-research prompts and designed multifaceted scoring rubrics for evaluating AI responses to consumer product queries. Developed factual-error detection, anti-hack criteria, and ensured tight rubric alignment with grounding URLs across multiple domains. Integrated multimodal tasks requiring image identification before text-based product analysis. • Created rubrics with 8–20 weighted criteria including grounding URLs and criterion tags. • Designed and validated fact-aligned, anti-hallucination, and negative scoring rubric components. • Developed self-contained, timeless evaluation criteria and prompt–rubric alignment checks. • Crafted prompts and tasks for both text- and image-based AI analysis in the consumer products domain.

Authored deep-research prompts and designed multifaceted scoring rubrics for evaluating AI responses to consumer product queries. Developed factual-error detection, anti-hack criteria, and ensured tight rubric alignment with grounding URLs across multiple domains. Integrated multimodal tasks requiring image identification before text-based product analysis. • Created rubrics with 8–20 weighted criteria including grounding URLs and criterion tags. • Designed and validated fact-aligned, anti-hallucination, and negative scoring rubric components. • Developed self-contained, timeless evaluation criteria and prompt–rubric alignment checks. • Crafted prompts and tasks for both text- and image-based AI analysis in the consumer products domain.

2025 - Present

Prompt Writer & Rubric Designer | Project Emporium (Contractor)

Text
Wrote research-based prompts and crafted grading rubrics for AI models on consumer product tasks, emphasizing multi-source information synthesis. Designed and reviewed tasks for factual accuracy and rubric completeness, ensuring strict adherence to grounding sources. Edited peer submissions for source quality and inclusion of anti-hallucination and anti-hack criteria. • Developed rubrics with over 15 criteria per task, integrating positive and negative weights. • Ensured every task included verifiable URLs and objective evaluation standards. • Focused on fact verification and unbiased, structured analysis prompts for model training. • Reviewed peer work, enhancing overall rubric and prompt quality for model reliability.

Wrote research-based prompts and crafted grading rubrics for AI models on consumer product tasks, emphasizing multi-source information synthesis. Designed and reviewed tasks for factual accuracy and rubric completeness, ensuring strict adherence to grounding sources. Edited peer submissions for source quality and inclusion of anti-hallucination and anti-hack criteria. • Developed rubrics with over 15 criteria per task, integrating positive and negative weights. • Ensured every task included verifiable URLs and objective evaluation standards. • Focused on fact verification and unbiased, structured analysis prompts for model training. • Reviewed peer work, enhancing overall rubric and prompt quality for model reliability.

2025 - 2025

Education

U

University of Greenwich

Bachelor of Science, Economics

Bachelor of Science
2013 - 2016
E

Ealing, Hammersmith and West London College

A-Levels, Economics and Accounting

A-Levels
2011 - 2013

Work History

E

Everstone

Founder and Principal

London
2024 - Present
D

Drovo

Founder and Chief Executive Officer

London
2015 - 2024