Subhojit S.
Manual QA Tester | AI/ML Data Annotator | Data Validation Specialist
Hi, I'm Subhojit — an India-based Manual QA Tester and AI/ML Data Annotator with native fluency in Bengali and English, delivering reliable, detail-oriented work across QA testing, data annotation, and document/data operations. I help businesses catch what others miss — especially in projects where small errors carry a big cost. I run full QA test cycles for mobile apps and websites, and build clean, guideline-compliant training data for AI/ML models, including underserved languages like Bengali. 🔹 QA Testing Expertise ✔ Functional, End-to-End & Usability Testing ✔ Smoke testing for quick release validation ✔ Cross-platform & multi-device testing ✔ Bug reports with clear repro steps, expected vs. actual results, and structured screenshots 🔹 Available Devices 📱 iOS device 📱 Multiple Android devices 💻 Mac mini (macOS) 🖥️ Windows 11 PC 🌐 Cross-browser testing (Chrome, Edge, Firefox) → Full cross-platform testing setup 🔹 AI/ML Data Annotation 🔸 Image & video annotation — bounding boxes, polygons, classification, basic segmentation (CVAT, Label Studio; familiar with Labelbox, SuperAnnotate) 🔸 Labeled and structured raw soccer match video footage and images to project guidelines 🔸 Organized and logged 80–100GB of raw video footage per shoot into structured, editor-ready folders (ongoing project) 🔸 Audio and text annotation in Bengali and Indian English — a language pair few annotators can cover accurately 🔸 Annotation review, error correction, and consistency QC across high-volume datasets 🔹 Document & Data Handling 🔸 Structured document processing (PDFs, spreadsheets, reports) 🔸 Data extraction, organization, and formatted output creation 🔸 Market/operational research, data verification, and summary reporting 🔹 Why Clients Keep Me ✔ Read the full guideline before starting — flag ambiguity instead of guessing ✔ Self-review every submission before handoff ✔ Consistent 9-10/10 accuracy across dozens of audit and QA assignments, zero rejections ✔ Comfortable with confidentiality, structured requirements, and deadline-driven work Professionalism ✔ Accuracy ✔ Quality ✔ Reliability ✔ On-Time Delivery ✔
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $923
Billed in all: $2,129$2.1k
$71 in the last 6 months
Across 19 contracts
Across 51 contracts
Earnings, last 30 days
Skill rankings: Top 24% in Content Writing
Ranked by MRR among everyone on Upwork with the skill.
- #48Image Classification119 freelancers · 🇮🇳 #1Top 40%🇮🇳#1 of 6
- #104CVAT204 freelancers · 🇮🇳 #7Top 51%🇮🇳#7 of 10
- #121Transcription Timestamping424 freelancers · 🇮🇳 #8Top 29%🇮🇳#8 of 27
- #206Video Annotation464 freelancers · 🇮🇳 #22Top 44%🇮🇳#22 of 42
- #250Online Market Research971 freelancers · 🇮🇳 #16Top 26%🇮🇳#16 of 58
- #275Image Annotation592 freelancers · 🇮🇳 #19Top 46%🇮🇳#19 of 43
- #362Video Transcription1,245 freelancers · 🇮🇳 #21Top 29%🇮🇳#21 of 67
- #391Chatbot1,273 freelancers · 🇮🇳 #74Top 31%🇮🇳#74 of 275