Rathna Sabhapathy Badha

Computational researcher working on reproducible AI, programmatic LLM evaluation, and benchmark integrity.

want a look at a cooler portfolio? ssh ssh.badha.is-a.dev -p 2222

Research focus

I conduct research at the intersection of AI-first development and verifiable computational methodologies. The work encompasses building applied artificial intelligence systems, including large language models and computer vision for tasks ranging from automated program repair to remote sensing. This development is anchored by rigorous empirical research. Programmatic evaluation and reproducible pipelines ensure all systems remain transparent and scientifically sound.


Selected publications

2025
Shape-Aware Oriented Bounding Box to Horizontal Bounding Box Conversion (arXiv preprint) arXiv

Superellipse-based localization method for satellite ship detection. Benchmarked on ShipRSImageNet (10,043 samples); mean IoU 0.5609 vs 0.4929 for OuterHBB.

2025
Deep Learning Approach Towards Green IIoT pdf

In Smart Computing Techniques in Industrial IoT, Studies in Computational Intelligence, vol. 1172, Springer.

2021
Drones, the Technology Involved, and Their Widespread Use pdf

International Journal of Research in Humanities, Arts and Science.


Selected projects

NLP
LILAI — IOL-AI 2026 Linguistics Competition code
Qwen2.5-14B PyTorch AWQ

Investigated grammar and phonology induction in low-resource languages using in-context learning with Qwen2.5-14B-Instruct. Designed inference strategies focused on calibrated prompting and minimal architectural complexity, achieving chrF 0.2998 on the IOL-AI 2026 benchmark. Demonstrated that careful prompt engineering with a single forward pass can match or exceed complex multi-stage approaches.

research
LWH — Large-Scale Ship Detection & Heading Estimation code
PyTorch GeoPandas OpenCV Rasterio

Multi-sensor satellite pipeline for ship detection, heading estimation, and dimensional measurement across Sentinel-1 SAR, Sentinel-2 optical, and PlanetScope sensors. Hybrid heading estimation combining border wake analysis, NIR wake detection, and ML-based prediction. Trained sensor-specific models with confidence scoring, deployed operationally at SkyServe for maritime surveillance.

systems
chemInteractions — Chemical Reaction Prediction Engine code
Rust ONNX Axum ReactionT5

Dual-brain reaction prediction engine fusing a 1.2B-parameter ReactionT5 Transformer (ONNX-optimized in Rust) with textbook functional group matching from a curated knowledge base. Delivers explainable predictions with confidence tiers — from pure ML inference to rule-verified results. Deployed as a high-performance axum REST API with PubChem enrichment.


Experience

Jul 2026–Present
Research Contributor · Cohere Labs Open Science Research Group

Collaborating within a core four-member team to design architecture and curate datasets for a truly open video world model, establishing transparent open-science methodologies from day one. Co-engineering reproducible experimentation and analysis pipelines across diverse video datasets. Contributing to a global open-research ecosystem building scalable, publicly accessible AI and open-source codebases.

Sep 2025–Present
AI Research Consultant · Sky Serve Pvt. Ltd., Bangalore

Engineered computer vision pipelines for remote sensing, developing high-precision convoy and ship detection models that secured a Top-3 national finish at the AIGC India Finals. Developed a novel Shape-Aware OBB to HBB conversion algorithm for satellite ship localization, improving mean IoU from 0.4929 to 0.5609 on the ShipRSImageNet benchmark. Architecting an automated road health assessment algorithm, optimizing geospatial vectorization workflows (GeoPandas) on high-performance clusters for scalable data processing.

Nov 2024–May 2025
R&D Project Intern · National Remote Sensing Center (ISRO), Hyderabad

Engineered a public-facing multilingual geospatial chatbot integrating programmatic LLM APIs to democratize access to complex data for non-technical users. Designed an LLM router for querying disparate geospatial data sources, ensuring transparent and verifiable data retrieval metrics. Developed empirical systems for road identification and solar-energy analysis, establishing baseline accuracy thresholds for public-sector deployment.

Jun 2024–Aug 2024
Research Intern (MITACS) · York University, Toronto, Canada

Architected an LLM-driven automated program repair pipeline, rigorously evaluating model performance via API against established software engineering benchmarks including SWE-bench Lite. Investigated benchmark contamination and data leakage in LLM training corpora, directly addressing trustworthiness and evaluation reliability in AI research. Expanded the Defects database, curating high-quality, reproducible evaluation datasets for empirical software engineering studies.


Education

Integrated B.Tech + M.Tech in Software Engineering
Vellore Institute of Technology · Sep 2020 – Jun 2025 · GPA 9.06 / 10
Master’s thesis: two-phase research on LLM evaluation — automated program repair on SWE-bench Lite and multilingual geospatial LLM routing.

Awards