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title: README
emoji: 👋
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Hi, I'm Kalana Hewapathirana 👋
Software Engineer & Computer Science Educator · Colombo, Sri Lanka 🇱🇰
BSc (Hons) Computer Science graduate working at the intersection of applied machine learning and education. I build end-to-end ML systems — data pipelines, model training, APIs, and dashboards — with a focus on NLP, computer vision, and document AI. Currently teaching Computer Science (Pearson Edexcel iLowerSecondary & IGCSE) while continuing to build and share ML work here.
🔬 What I work on
- NLP & Text Classification — Sentence Transformers and BERT-based classifiers for app review and complaint analytics
- Computer Vision — CNNs for diabetic retinopathy detection, transfer learning with DenseNet121
- OCR & Document AI — EasyOCR pipelines for digitizing handwritten records
- ML Engineering — FastAPI, PostgreSQL, SQLite, Streamlit dashboards, embedding storage and retraining pipelines
🚀 Featured Projects
| Project | Stack | Highlights |
|---|---|---|
| Diabetic Retinopathy Detection | TensorFlow, custom CNN | 98% accuracy lightweight model; benchmarked against DenseNet121 with test-time augmentation |
| SLT Selfcare Bug Analytics | BERT, Streamlit | Classifies Play Store reviews into bug categories, cutting manual triage time |
| Review Analytics Engine | Sentence Transformers, Logistic Regression, SQLite | End-to-end complaint classification with a retraining pipeline |
| WiFi Router Localization | Particle & Kalman Filters, FastAPI, Leaflet.js | Real-time RSSI/GPS positioning with live map visualization |
| Fiber Length OCR | EasyOCR, Python | Automated extraction of handwritten fiber data into a queryable database |
🛠️ Tech Stack
Python · TensorFlow · PyTorch · Scikit-learn · Transformers · FastAPI · PostgreSQL · SQLite · Streamlit · EasyOCR · Git
🎓 Background
- BSc (Hons) Computer Science — South Eastern University of Sri Lanka
- Computer Science Teacher — IES College International (Pearson Edexcel)
- Software Engineer (Intern) — Sri Lanka Telecom, Digital Platforms
📫 Connect
