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| title: README |
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| # Hi, I'm Kalana Hewapathirana 👋 |
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| **Software Engineer & Computer Science Educator** · Colombo, Sri Lanka 🇱🇰 |
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| 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. |
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| ## 🔬 What I work on |
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| - **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 |
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| ## 🚀 Featured Projects |
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| | 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 | |
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| ## 🛠️ Tech Stack |
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| `Python` · `TensorFlow` · `PyTorch` · `Scikit-learn` · `Transformers` · `FastAPI` · `PostgreSQL` · `SQLite` · `Streamlit` · `EasyOCR` · `Git` |
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| ## 🎓 Background |
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| - **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 |
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| ## 📫 Connect |
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| [](https://linkedin.com/in/hewapathirana-kr) |
| [](https://github.com/kaan84k) |
| [](mailto:kalanarandil@gmail.com) |
