I'm a data analyst who likes the whole journey: cleaning messy records, finding the real question, building the model, and explaining the answer so people can act on it.
Click a card to open the repository. The numbers come from each project's own tests and benchmarks.
🧪 6 more projects: exam questions, inventory, outbreaks, climate, earthquakes, air quality
💼 Experience details
📊 Data Analyst Intern · S & S Power Solutions Lanka (Pvt) Ltd · Jul – Dec 2025
- Audited data and resolved duplicate and inconsistent records; built a centralized customer database
- Sales analysis, customer segmentation and cross-selling; inventory monitoring and demand forecasting
- Dashboards and reports in Excel and Power BI
👨🏫 Mathematics & Science Teacher (G.C.E. O/L) · 5+ years
- English and Sinhala medium at Zenith Educational Institute (Piliyandala), Sylvester Institute (Mount Lavinia) and Aruna Institute (Halpita), after starting with individual tuition
- Turning exam results into insight led to the Exam Question Analytics project
🏗️ Kaldera Construction
- Manage a construction business; built a digital workflow for project timelines, resources and financial reporting (SQL Server, Excel)
- 🎓 Thesis: stylometric attribution of LLM-generated text under rewriting pressure. 1,196 samples from 4 models across 4 domains, rewritten lightly and heavily; an XGBoost + Random Forest + MLP ensemble with SHAP. Journal submission planned for November 2026.
- 🖼️ Now exploring on Kaggle: recovering AI-edited images with Segment Anything Model 3 (SAM 3), plus data engineering and quantitative finance.
- 🆔 ORCID: 0009-0009-5824-0051
📝 Latest on Medium
- [He Said He Was “Just Not a Maths Person”](https://medium.com/@harshakaldera540/he-said-he-was-just-not-a-maths-person-bb7aabbe318a?source=rss-4b28d0eb930e------2) · Nov 1, 2026- Nobody Prepared Me for the Morning After Graduation · Oct 24, 2026
14 certificates from Google, Microsoft, IBM, AWS, Duke University and HP LIFE · click to see and verify
| Issuer | Certificate |
|---|---|
| Foundations of Data Science · The Power of Statistics · Go Beyond the Numbers · Share Data Through the Art of Visualization | |
| Microsoft | Preparing Data for Analysis with Microsoft Excel · Harnessing the Power of Data with Power BI |
| IBM | Generative AI: Elevate Your Data Science Career · Generative AI Essentials for Data Science (Credly) |
| AWS | AWS Cloud Practitioner Essentials · Exam Prep: AWS Certified Solutions Architect – Associate |
| Duke University | Introduction to Probability and Data with R |
| HP LIFE | Data Science & Analytics · Presenting Data · AI for Business Professionals |
All earned in 2026.
💬 Ask me about data analytics & forecasting, turning exam results into insight, or research on AI-written text