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G. Karthik Koundinya

Writing

Engineering write-ups on the systems and research behind the results: what I built, how I measured it, and what I took from it.

Engineering post29 October 2026, 12 min read
How Team Minutes finished 38th of 32,000+ at the Amazon ML Challenge 2026
The engineering behind a 0.990 macro F0.5 entity-resolution solution: validation design, retrieval, a LightGBM and cross-encoder stack, exact expected-F0.5 decisions and label-free rules for France.
- Entity resolution
- Bi-encoder retrieval
- Cross-encoder reranking
- LightGBM stacking
- Out-of-fold validation
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