Ventsislav Lilkin

Key Skills

Software

Labelbox

Roboflow

Top Subject Matter

No subject matter listed

Top Data Types

Image

Top Label Types

Segmentation

Classification

Freelancer Overview

I am an experienced AI Trainer and Data Labeling Specialist with over three years of hands-on expertise in data annotation, AI model evaluation, and Python-based data processing. I have worked on diverse projects through platforms like Alignerr, Labelbox, and Upwork, consistently delivering high-accuracy labeled datasets for machine learning applications. My skills include using industry-standard tools such as Label Studio, Roboflow, CVAT, and cloud platforms like AWS and GCP. I am adept at following complex annotation guidelines, performing quality assurance checks, and troubleshooting technical issues for SaaS and automation domains. My background in technical communication, analytical thinking, and independent remote work allows me to adapt quickly to new workflows and consistently meet project deadlines. I am passionate about contributing to high-quality AI training data and am available for remote opportunities in a variety of domains.

Labeling Experience

Data Annotator

LabelboxImageSegmentation

I performed high-accuracy data annotation for machine learning datasets, ensuring 100% compliance with project guidelines. My work included structured data labeling, bounding boxes, segmentation, and conducting quality audits for LLM and model projects. I resolved labeling errors and maintained clean data for downstream ML use. • Annotated images with bounding boxes and segmentation for AI/ML training • Conducted quality assurance and error detection processes • Used Labelbox, Alignerr, Label Studio, and CVAT for annotation tasks • Ensured outputs met strict evaluation criteria and project requirements

I performed high-accuracy data annotation for machine learning datasets, ensuring 100% compliance with project guidelines. My work included structured data labeling, bounding boxes, segmentation, and conducting quality audits for LLM and model projects. I resolved labeling errors and maintained clean data for downstream ML use. • Annotated images with bounding boxes and segmentation for AI/ML training • Conducted quality assurance and error detection processes • Used Labelbox, Alignerr, Label Studio, and CVAT for annotation tasks • Ensured outputs met strict evaluation criteria and project requirements

2024

Freelance Annotator & Data Processor

RoboflowImageClassification

As a freelance annotator, I handled large-scale categorization, tagging, and validation of AI training data for diverse clients. I ensured meticulous adherence to client requirements and delivered completed datasets with accuracy reports. Python scripting was leveraged to preprocess and clean data before annotation. • Labeled and categorized images for AI pipelines on Upwork • Delivered comprehensive quality and coverage documentation • Used Roboflow and Label Studio as primary annotation software • Consistently met client standards and timelines for deliverables

As a freelance annotator, I handled large-scale categorization, tagging, and validation of AI training data for diverse clients. I ensured meticulous adherence to client requirements and delivered completed datasets with accuracy reports. Python scripting was leveraged to preprocess and clean data before annotation. • Labeled and categorized images for AI pipelines on Upwork • Delivered comprehensive quality and coverage documentation • Used Roboflow and Label Studio as primary annotation software • Consistently met client standards and timelines for deliverables

2023

Education

Work History