Maria Yoganingtyas
Verified Expert in Engineering
Data Labeling Specialist and Developer
Kudus, Kudus Regency, Central Java, Indonesia
Toptal member since October 15, 2025
Maria is a detail-oriented and highly organized data annotation and labeling specialist with 4+ years of experience supporting artificial intelligence (AI) and machine learning (ML) initiatives. She is proficient in various types of data labeling, including polygons and bounding boxes, ensuring high accuracy and professionalism. At Supahands, Maria performed quality control for room instance segmentation and waste classification datasets, contributing to reliable, high-quality AI model training.
Portfolio
Experience
- Image Annotation - 4 years
- Data Labeling - 4 years
- Data Annotation - 4 years
- Image Segmentation - 4 years
- Polygon - 4 years
- AI Data Classification - 4 years
- Instance Segmentation - 3 years
- UI Elements - 2 years
Preferred Environment
Discord
The most amazing...
...work I've done is performing quality control for room instance segmentation and ensuring project data accuracy consistently exceeded 90%.
Work Experience
AI/ML Data Labeling Specialist
Supahands
- Labeled and annotated large datasets for AI and ML projects using polygons and bounding boxes to ensure high-quality, accurate training data for model development.
- Performed quality control for room instance segmentation.
- Ensured project data accuracy consistently exceeded 90%.
Data Annotation Specialist
Freelance Client
- Leveraged native Malay language expertise to accurately annotate and verify 90+ complex digital menu items, ensuring linguistic precision for machine learning training.
- Performed high-accuracy image analysis and data matching between digital menus and templates to maintain 100% data integrity for price and item descriptions.
- Conducted meticulous quality assurance checks on localized datasets, verifying price markups and item names to optimize model performance for a large-scale AI project.
Experience
Trash Annotation
Room Instance Segmentation
Education
Bachelor of Education Degree in Economics Accounting
Sanata Dharma University - Yogyakarta, Indonesia
Skills
Tools
Slack, Microsoft Excel, Microsoft PowerPoint, Microsoft Word, Spreadsheets, ChatGPT
Paradigms
Management
Other
Data Annotation, Data Labeling, Image Segmentation, Image Annotation, Discord, Educational Planning and Teaching Methods, Accounting Principles, Economic Analysis and Business Understanding, Student Guidance, Lesson Development, Research, Creative Problem Solving, UI Elements, Instance Segmentation, Semantic Segmentation, AI Data Classification, Research & Critical Thinking, Data Interpretation, Curriculum Development & Delivery, Financial Reporting, Polygon, Data Quality, Image Analysis, Machine Learning Data Training, Content Validation, Translation Verification, Large Language Models (LLMs), AI Model Training, AI Research, Artificial Intelligence (AI)
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