Rohit Prajapati

Researcher, Shell R&D · PhD Candidate, IIT Jodhpur

I work on high-performance computing: designing parallel and distributed systems that make large-scale computation fast, scalable, and efficient. Building on that, I develop dynamic graph algorithms for real-time workloads on distributed and parallel systems.

At Shell R&D, I build production agentic RAG systems over multi-collection vector stores and optimise high-performance computing for large-scale AI workloads.

High-performance computing
AI workload optimisation
Dynamic graph algorithms
Model compression

Lately

Oct 2026
Paper accepted at HiPC 2026 — LayComp: Layer-by-Layer Compression for Transformers.New
Jul 2026
Presented SAGA at HPDC 2026 in Cleveland, OH.
Jun 2026
Paper published at EAGE 2026 — E-DALE: End-to-End Domain Adaptation for Large Language Models in the Energy Sector.
May 2026
Paper accepted at HPDC 2026 — SAGA: State-Aware Graph Analytics for Combinatorial Optimization on Dynamic Graphs.
Apr 2026
Paper accepted at SIGMOD 2026 — PJsim: Towards Precise and Scalable Graph Similarity.
Jan 2026
Paper accepted at ICDCN 2026 — A Precise and Closed-Form Solution for Edge-Ranking.
Sep 2025
Joined Shell R&D as Researcher in the Digital & Scientific HPC team.
Jan 2025
Started PhD at IIT Jodhpur, SPADE Research Lab.

Publications

HiPC 2026
LayComp: Layer-by-Layer Compression for Transformers

Rohit Prajapati, Mudit Sand, Kapil Mathur, Subhasis Banerjee · Bengaluru, India

33rd IEEE International Conference on High Performance Computing

To appear · Dec 2026

HPDC 2026

SAGA: State-Aware Graph Analytics for Combinatorial Optimization on Dynamic Graphs

Rohit Prajapati, Prajjwal Nijhara, Dip Sankar Banerjee · Cleveland, OH, USA

ACM International Symposium on High-Performance Parallel and Distributed Computing

DOI

@inproceedings{prajapati2026saga,
  author    = {Prajapati, Rohit and Nijhara, Prajjwal and
               Banerjee, Dip Sankar},
  title     = {SAGA: State-Aware Graph Analytics for Combinatorial
               Optimization on Dynamic Graphs},
  booktitle = {Proceedings of the 35th International Symposium on
               High-Performance Parallel and Distributed Computing},
  series    = {HPDC '26},
  pages     = {430--444},
  year      = {2026},
  address   = {Cleveland, OH, USA},
  publisher = {ACM},
  doi       = {10.1145/3806645.3807595}
}

EAGE 2026

E-DALE: End-to-End Domain Adaptation for Large Language Models in the Energy Sector

Injy Sarhan, Avanindra Singh, Lalson Vincent, Yogesh Nakhate, Mudit Sand, Eirini Stamatiou, Rohit Prajapati, Oleg Ovcharenko, Oleg Sudakov, Filippo Broggini, Sagar Desai, Detlef Hohl · Aberdeen, UK

87th EAGE Annual Conference & Exhibition

EarthDoc

@inproceedings{sarhan2026edale,
  author    = {Sarhan, Injy and Singh, Avanindra and Vincent, Lalson and
               Nakhate, Yogesh and Sand, Mudit and Stamatiou, Eirini and
               Prajapati, Rohit and Ovcharenko, Oleg and Sudakov, Oleg and
               Broggini, Filippo and Desai, Sagar and Hohl, Detlef},
  title     = {E-DALE: End-to-End Domain Adaptation for Large Language
               Models in the Energy Sector},
  booktitle = {87th EAGE Annual Conference \& Exhibition},
  year      = {2026},
  address   = {Aberdeen, UK},
  publisher = {European Association of Geoscientists \& Engineers},
  doi       = {10.3997/2214-4609.2026101329}
}

SIGMOD 2026

PJsim: Towards Precise and Scalable Graph Similarity

Prajjwal Nijhara, Jainan Tandel, Rohit Prajapati, Dip Sankar Banerjee · Bengaluru, India

Proceedings of the ACM on Management of Data, Vol. 4, No. 3

DOI

@article{nijhara2026pjsim,
  author    = {Nijhara, Prajjwal and Tandel, Jainan and
               Prajapati, Rohit and Banerjee, Dip Sankar},
  title     = {PJsim: Towards Precise and Scalable Graph Similarity},
  journal   = {Proceedings of the ACM on Management of Data},
  volume    = {4},
  number    = {3},
  pages     = {1--25},
  year      = {2026},
  publisher = {ACM},
  doi       = {10.1145/3802100}
}

ICDCN 2026

A Precise and Closed-Form Solution for Edge-Ranking

Prajjwal Nijhara, Jainan Tandel, Rohit Prajapati, Dip Sankar Banerjee · Nara, Japan

International Conference on Distributed Computing and Networking

DOI

@inproceedings{nijhara2026edgeranking,
  author    = {Nijhara, Prajjwal and Tandel, Jainan and
               Prajapati, Rohit and Banerjee, Dip Sankar},
  title     = {A Precise and Closed-Form Solution for Edge-Ranking},
  booktitle = {Proceedings of the 27th International Conference on
               Distributed Computing and Networking},
  series    = {ICDCN '26},
  pages     = {138--142},
  year      = {2026},
  address   = {Nara, Japan},
  publisher = {ACM},
  doi       = {10.1145/3772290.3772316}
}