Data Annotation Engineer

Role & responsibilities

Technical Skills for Data Annotation

• Annotation Tools & Platforms

• Labelbox, CVAT, Supervisely, RectLabel, VGG Image Annotator (VIA)
• Proficiency in in-house/custom annotation tools

• Image & Video Annotation

• Bounding boxes, polygons, semantic segmentation, keypoint annotation
• Object detection, tracking, and classification in video frames

• Text Annotation

• Named Entity Recognition (NER)
• Sentiment analysis labeling
• Intent classification for chatbots
• Part-of-speech tagging

• Audio Annotation

• Speech transcription
• Speaker diarization (identifying speakers)
• Emotion and acoustic event labeling

• Data Handling & Formats

• JSON, XML, CSV for annotated datasets
• Familiarity with dataset structuring for ML pipelines

• Quality Assurance

• Consistency checks, inter-annotator agreement
• Following annotation guidelines and edge-case handling

• Automation & Scripting

• Python basics for preprocessing and validation
• Using AI-assisted annotation tools and correcting outputs

• Domain-Specific Annotation

• Medical imaging (X-rays, MRIs)
• Retail/product categorization
• Autonomous driving datasets
  Data Annotation | Image & Video Labeling | Text Annotation (NER, Sentiment, Intent) | Audio Transcription | CVAT | Labelbox | JSON/XML/CSV | Python (Data Preprocessing) | Quality Assurance | Semantic Segmentation | Bounding Boxes | Annotation Guidelines

Position Description: A data annotator has to annotate text, image, video etc. according to client guidelines written in English required for Machine Learning in applications like autonomous vehicles, medical diagnostics etc.

Skill requirements Locate, label, tag and categorize various elements in image, video, text data Ability to comprehend paragraphs written in English. Ability to perform repetitive tasks while paying constant close attention to detail and delivery accurate and precise work Basic usage of Word, Excel etc. Average English communication with CEFR level B2. Good eyesight & ability to sit at desk for prolonged hours

Preferred candidate profile

Only STEM-background freshers (B.Sc / M.Sc / B.Tech / B.E / BCA / MCA/Diploma(10+2+3))

interested candidates can share resume via mail

damini.singh@teamlease.com