Hi, I'm Tanvir Mahmud!
About
AI Data Specialist with hands-on experience in data annotation, Human-in-the-Loop QA, and LLM development. Transcriptionist & Auditor on audio/emotion projects (Appen, Babel Audio). Ranked Top 800 global contributor on Sapien and member of its Builder Circle (Founding Cohort).
Skills
• Annotation: Image, Video, Text, Audio, Geospatial · Bounding Boxes, Segmentation, Polygons
• QA: HITL, Quality Auditing, Bias Reduction
• LLM: Prompt Engineering, Fine-Tuning (LoRA/QLoRA), RAG, Model Evaluation
• Tools: Label Studio, CVAT, Labelbox
Experience
Transcriptionist & Auditor — CrowdGen by Appen (Jun 2026 – Present)
Audio transcription for speech recognition datasets
Transcriptionist — Babel Audio (Jun 2026 – Present)
AI Data Labeler — Sapien.io (2024 – Present)
Top 800 High-quality multimodal annotation · Builder Circle (Founding Cohort)
AI Training Specialist — Humanoid Network & others (2023 – Present)
Data preparation & model training for robotics, voice AI, and LLM projects
Certifications
• Data Labeling & Annotation for AI — DataLens Africa Academy (2026)
• HITL QA & Data Quality Management — DataLens Africa Academy (2026)
• LLM Fine-Tuning, Prompt Engineering & Evaluation — DataLens Africa Academy (2026)
Education
MBA (HRM) · BBA (Accounting) — North South University