Arunkumar B.

Senior AI Data Trainer, Data Annotation Specialist and Tamil Linguist with 8+ years of experience supporting large scale AI training datasets for leading technology platforms including Meta, Google and Amazon ecosystems. I specialize in the intersection of AI Safety, Multimodal Annotation and Linguistic Excellence. Core Expertise: LLM & RLHF Evaluation: Expert in 6-dimension rubric rating, Golden Response creation, and AI Safety Red Teaming using adversarial prompts to detect policy violations. Computer Vision: High-precision annotation for Robotics, Agricultural, and Autonomous Vehicle datasets using CVAT, Roboflow, and Labelbox. Tamil Language Mastery: Native Tamil expert providing Creative Dubbing Adaptation, High Fidelity Transcription (LOFT 2.0) and Translation QA. Trust & Safety: Extensive experience in Content Moderation, Fact Checking and Search Ads Evaluation for global social media platforms. What I Specialize In: Data Annotation – Skilled in text annotation, image annotation, video annotation, audio annotation, and dataset labeling. Experienced in a wide range of annotation techniques including segmentation, classification, bounding boxes, polygon annotation, tagging, transcription based labeling, and dataset preparation. AI Evaluation – Experienced in reviewing AI generated text responses, training data evaluation, and crafting prompts to improve chatbot accuracy, safety, and performance. Skilled in applying structured rubrics to assess instruction following, factual accuracy, clarity, writing style, and overall response quality. Image Evaluation – Evaluated AI generated images through structured annotation, identifying issues such as unrealistic lighting, unnatural poses, distorted facial features, and incorrect object rendering. Provided detailed justifications to improve dataset quality, model training, and alignment. RLHF based Chatbot Evaluation (6 Dimension Rubric) – Evaluated chatbot responses across Harmlessness, Writing Style, Verbosity, Instruction Following, Factual Accuracy, and Overall Quality. Used structured rubrics to rate, compare, and justify AI text responses, helping refine model safety, alignment, and usefulness. Tamil and Language Tasks – Proficient in Tamil transcription, localization and English - Tamil translation. Skilled in Tamil transcription with timestamping, segmentation and detailed annotation for speech and text datasets. Experienced as a proofreader and reviewer of machine translated and machine transcribed content, ensuring the highest levels of accuracy, fluency, and cultural relevance. Subtitle QA & AI Dubbing Evaluation – Subtitle validation, ASR review, translation accuracy, voice quality, and dubbing assessment. Content Moderation and Fact Checking – Skilled in moderating content, verifying facts, and ensuring accuracy and compliance in social media posts, e-commerce listings, and search engine results. Advanced Video Annotation & Object Tracking - Experienced in refining pre labeled video datasets, including bounding box adjustments, track corrections and annotation quality improvement. Python, Pandas, and NumPy for data processing and annotation workflow automation. Online Research and Data Tasks – Conduct structured research, dataset verification, and metadata collection to support AI training datasets and evaluation workflows. Services Offered AI Data Training | Data Annotation | Dataset Labeling | RLHF Evaluation | AI Model Evaluation | AI Safety Red Teaming Image Annotation | Video Annotation | Text Annotation | Audio Annotation | OCR Annotation | Bounding Box | Polygon | Semantic Segmentation | Image Classification | Keypoint Annotation | YOLO | COCO | Computer Vision Annotation AI Response Evaluation | Side-by-Side Comparison | Rubric Rating | Prompt Writing | Golden Response Creation | AI Image Evaluation | AI Voice Evaluation | Image Moderation Content Moderation | Trust & Safety Review | Social Media Moderation | Ad Moderation | Sensitive Content Review | Fact Checking | Policy Compliance Review Tamil ↔ English Translation | Tamil Transcription | English Transcription | YouTube Transcription | Audio/Video Transcription | Timestamped Transcription | Subtitle Transcription | Speech Data Annotation | Dubbing Evaluation Robotics Datasets | Agricultural Image Datasets | Autonomous Vehicle Datasets | E-commerce Image Datasets | OCR Document Annotation Tools and Platforms I Have Experience With: ✔ Platforms – Multimango, Workspace by Meta, ADAP by Appen, Data Compute by Google ✔ Annotation Tools - CVAT, Roboflow, Label Studio, Labelbox and V7 Darwin ✔ Microsoft Excel, Word, PowerPoint ✔ Google Docs and Google Sheets ✔ Transcription Tools – LOFT 2.0, MatrixGo, Soniox, Deepgram, ElevenLabs, Descript, Otter.ai, Krisp and Whisper. ✔ AI Dubbing & Subtitle - Deepdub AI, Amara, ElevenLabs and Palabra.ai ✔ Translation Tools – Phrase, Smartcat, Lokalise and Anuvadini AI ✔ AI Models: ChatGPT, Gemini, Claude, Midjourney and Suno.