About Me
Rabimba Karanjai is a Staff Agentic AI Researcher at PayPal Research. He completed his Ph.D. in Computer Science at the University of Houston (defended July 2025), where his research focused on the intersection of blockchain, secure AI reasoning, and LLM-assisted program analysis and repair.
Education
Ph.D. in Computer Science
University of Houston
M.S. in Computer Science
Rice University
Interests
Agentic AI & AI Reasoning
LLMs Security & Smart Contracts
Decentralized Systems & Blockchain
Formal Verification & Software Engineering
Web VR & High Performance Computing
Research Overview
I am a Staff Agent Researcher at PayPal and a PhD graduate from the University of Houston, advised by Prof. Weidong (Larry) Shi. My research sits at the intersection of AI reasoning, decentralized systems, and software security.
Core research areas:
- LLM Reasoning & Code Generation — Multi-agent architectures for reliable code/test generation (AgentTester, LogBabylon) and hallucination mitigation
- Blockchain & Smart Contract Security — Cross-chain vulnerability detection, decentralized infrastructure, and formal verification of smart contracts
- Quantum-Enhanced ML — Quantum contrastive embeddings for near-term devices (QuCoWE, AAAI 2026)
I am a Google Developer Expert in Web Technologies & ML, a 3x Sui Foundation Research Award recipient, and serve as Associate Chair for AAAI 2027 and ACM CSCW 2026.
Key Achievements
41
Peer-Reviewed Publications
28 as first author across NeurIPS, USENIX Security, AAAI, ACM FSE, MICRO, IEEE ICBC, KDD — 14 more under review
1
Issued US Patent
US11025643B2 — multi-factor authentication combining biometrics and blockchain (IBM)
4x
Research Grants
$90K+ from Sui Foundation (3x) and Grant for Web as Principal Investigator
85+
Invited Talks
Google I/O, OSCON, NDC Sydney, FOSDEM, KubeCon, Stanford, MIT, Berkeley RDI, and more
ACM SIGSOFT Distinguished Paper Award
ACM AIWare 2025 — Securing the Multi-Chain Ecosystem
Best Dissertation Award
Dan E. Wells Outstanding Dissertation Award & UH CS Best Dissertation (2025)
Google Developer Expert
Web Technologies (2018–present) & Google Cloud AI/ML (2024–present)
NVIDIA Developer Champion
Recognized for contributions to AI and GPU computing community (2026)
Distinguished Publications
Collaboration is all you need: LLM Assisted Safe Code Translation
Rabimba Karanjai
Smart Contract Code Translation based on Concepts
Rabimba Karanjai
Decentralized Application Infrastructures as Smart Contract Codes
Rabimba Karanjai
Grants & Funding
- Sui Foundation Academic Research Award (2023, 2024, 2025) — Primary Investigator, $25,000/year for research on decentralized infrastructure and smart contract security
- Grant for Web — Primary Investigator, $15,000 for advancing privacy-preserving and decentralized web technologies
- Google Cloud Research Innovator (2023, 2024) — Cloud credits and research support for AI/ML projects
Research Projects
Bay Area Pujo Parikrama
Interactive Durga Puja guide and route planner for the San Francisco Bay Area, mapping 31 pujas across 6 regions with schedules, bhog details, tickets, and directions.
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1 min read
Houston Pujo Parikrama
Community guide and interactive pandal-hopping planner for Durga Puja across Greater Houston, covering schedules, bhog, and cultural events across 5 regions.
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1 min read
AI Race Coach (Project Koru)
Built a real-time AI Race Coach at Sonoma Raceway with Google Developer Experts, using Antigravity, Gemini API, Gemma 4, and Jetpack Compose to process live telemetry at 100 mph.
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1 min read
ConferenceRank
One-stop shop to evaluate CS conference & journal venues — CORE/ICORE ranks, SJR quartiles, multi-decade acceptance rates, submission deadlines (AoE), and an MCP server + JSON API …
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1 min read
Open Source
One-stop CS venue evaluation — CORE/SJR ranks, acceptance-rate trends, AoE deadlines, and venue suggester. Ships MCP server, JSON API, and agent skill for LLM consumption.
End-to-end browser studio and firmware modder for the Google WebAI Summit 2026 Espruino 4-Color ePaper Badge — bit-exact 2bpp BWYR codec and WebGPU LiteRT-LM/MediaPipe pipeline.
Cross-platform (Linux & macOS) local-first multimodal search engine, EmbeddingGemma 2 768-D Semantic-Space ASR, and Part-of-File containment engine in Rust.
Privacy-first DICOM viewer that plans slice selection with Gemma 4 before multimodal review — ~99% fewer image tokens, fully in-browser via WebGPU.
Hands-on AI/ML workshop code, codelabs, and interactive presentation decks from Google Developer Expert sessions on Gemini, ADK, MCP, and Cloud Run.
Single-variable benchmark harness for serving LLMs with vLLM across CUDA and OpenXLA/XLA backends — honest goodput under fixed SLOs.
The AI Race Coach Android dashboard from the Google I/O GDE Field Test — 10 Hz telemetry, Gemini reasoning, on-device Gemma 4 coaching.
Artifacts for our USENIX Security 26 paper: the LogInject benchmark, Context Stitching attacks, and layered-defense mitigation evaluation.
Co-authored Google codelab “Building Trustable AI at 100 MPH” — split-brain architecture, telemetry streaming, guardrails, and Gemini strategy layers.
Research prototypes, agents, and tooling — from smart-contract security scanners to multi-agent routers.
Google Developer Expert & Community
- Google Developer Expert in AI/ML & Cloud (previously Chrome & Web, 2018–2024) — directory profile
- Co-author of Google’s official Building Trustable AI at 100 MPH codelab with a global GDE cohort
- Workshop Instructor at LA Tech Week 2026 (Google for Developers & Google for Startups) alongside Kiruthika Subramani, delivering hands-on codelabs on Location Intelligence ADK Agents with MCP and Command & Control with Gemini & Antigravity
- Invited speaker at Google I/O Field Tests (Sonoma Raceway 2026), OpenXLA DevLab Summer 2026, and the GDE Summit at Google I/O 2025
- Mentor & Coach for startup founders at the Google for Startups Accelerator in San Francisco; judge for Google Solutions Challenge and Women Techmakers Academy
- Google Cloud Research Innovator (2023) and Google Cloud Champions Innovator (2023–2025)
- Google TPU Builders (2026) and NVIDIA Developer Champion (2026); earlier Mozilla Tech Speaker and Mozilla Research Fellowship (2018)
Recent Publications
(2026).
TxnQA: Benchmarking Analytical Reasoning and Evidence Grounding over Transaction Event Sequences.
AAAI 2027 (Under Review).
(2026).
CM-DPO: Constraint-Margin Direct Preference Optimization for LLM Planning.
NeurIPS 2026 (Under Review).
(2026).
A Picture is Worth a Thousand Tokens: Lossless Multilingual Context Compression via Pictorial Intermediate Representations.
AAAI 2027 (Under Review).
(2026).
CoJo-RAG: Conformalized Joint Co-Optimization of Retrieval and Fine-Tuning.
AAAI 2027 (Under Review).
(2026).
Designing the Outside Option: Anchors, Mixed Equilibria, and Welfare in LLM Routing Auctions.
AAAI 2027 (Under Review).
Upcoming Talks
Recent Talks
LA Tech Week 2026 — Google for Developers Codelabs & AI Workshops
Delivered two hands-on Google Developer Expert codelab workshops at LA Tech Week 2026 alongside Kiruthika Subramani, covering production Agent Development Kit (ADK) integration …
House of AI: AI Safety Forum — Closing Panel
Closing panel at the House of AI Safety Forum (0G Labs, Stanford Founders Club) on *The $100 Billion Question: Who Is Responsible When AI Goes Wrong?* — with Jon Ozdoruk (DSALTA) …
Context Contamination at USENIX Security 26 — Oral Presentation & Poster
Presented our paper "Context Contamination in LLM Analysis of Network Security Logs" at USENIX Security 2026 in Baltimore — an oral presentation plus a poster session.
OpenXLA Summer DevLab 2026 — Benchmarking vLLM on XLA Backends
Invited talk at Google OpenXLA DevLab Summer 2026 on "Benchmarking vLLM on XLA Backends: From CUDA to OpenXLA for LLM Serving", speaking alongside engineers from Google, NVIDIA, …
Google I/O GDE Field Test — AI Race Coach at Sonoma Raceway
Built a real-time AI Race Coach with Google Developer Experts using Antigravity, Gemini API, Gemma 4, and Jetpack Compose. Processed live telemetry at 100 mph to deliver …
Recent Blog Posts
WebAI Badge Studio: Espruino at Google WebAI Summit
How a 45-minute portrait queue turned into a live USB-C hardware hack, a bit-exact 96,000-byte 2bpp BWYR codec, surgical .bootcde firmware patching, and an open-source WebAI Badge …
Racecraft: Fine-Tuning Gemma 4 with DPO for Sub-150ms On-Device Coaching at 130 MPH
Read full post →
Splitting the Brain to Beat the Clock
How a "brake!" lands in 5 milliseconds while a cloud model thinks for five seconds — in the same app, on the same frame, without ever colliding.
Professional Service
- Associate Chair, AAAI 2027 and ACM CSCW 2026; Track Chair, ICEDEG 2026
- Scientific Advisory Committee, Texas Quantum Initiative (2025)
- Google Developer Expert, Web Technologies (2018-present) & Google Cloud (2024-present)
- Reviewer (Journals): PLOS One, Frontiers in Blockchain, ACM DLT, ACM TALLIP, Connection Science, ACM TWEB
- Reviewer (Conferences): CHI 2026, IEEE VR 2026, AAAI 2025, ICLR 2024, IEEE ICEDEG 2025
Get in Touch
Happy to talk about research collaborations, industry problems, talks, or the GDE program. The fastest way to reach me is email or LinkedIn.