Sidaarth (Sid) Sabhnani

I'm a software engineer at IMC Trading in Chicago. I received my M.S. (2026) and B.S. (Honors, 2025) in computer science from the University of Texas at Austin, where I was advised by Prof. David Wu.

I'm primarily interested in systems performance — including in cryptography, operating systems, distributed systems, and ML inference.

You can reach me at ssabhnani [at] utexas [dot] edu.

github · linkedin · resume

Publications

• 2026From Lattices to Tensor Cores: Accelerating Private Information Retrieval. Sidaarth Sabhnani, David J. Wu. Cryptology ePrint Archive, Report 2026/1816.SandwichPIR is the first single-server PIR protocol to run the bulk of the server computation as 8-bit integer matrix multiplications on GPU tensor cores, with no offline communication. It answers a query to a 4 GB database in 8.2 ms — 488 GB/s, 88× faster than the best CPU protocol without offline communication. Batching 128 queries reaches an effective ~24 TB/s on one L40S and nearly 270 TB/s across 8 GPUs on a 256 GB database, and serves private access to English Wikipedia at >2,500 queries per second on a single GPU.

Work

• 2026—Software Engineer, IMC Trading
• 2025–Graduate Researcher, UT Austin — Cryptography, Rust, CUDA
• 2025SWE Intern, IMC Trading — FPGA SW, C++

Education

• 2024–26M.S. Computer Science via the Integrated B.S./M.S. program, UT Austin. Advised by David Wu. Thesis: From Lattices to Tensor Cores: Accelerating Communication-Efficient Private Information Retrieval. Second reader: Christopher Rossbach.
• 2021–25B.S. Computer Science (Honors) & B.B.A. (Canfield Honors) via the Computer Science + Business (CSB) Honors program, UT Austin.

Teaching & Service

• 20242× TA, CS 439 / 439H Operating Systems — Prof. Ahmed Gheith.Discussion sections, office hours, and grading for 100+ students on semester-long kernel projects (VM, FS, processes, drivers, networking).
• 2023–24Co-President, Freetail Hackers / HackTX.Co-led 50+ organizers running hackathons for 2,000+ hackers on $160K budgets. HackTX 2024 was the largest yet, partnered with UT’s Year of AI.

Projects

• 2025SHIELD — software defense against Rowhammer bitflips on RISC-V via compiler-injected checks and cryptographic binary integrity (code).
• 2024—JellyOS — monolithic OS in Rust on bare-metal Raspberry Pi 3B (AArch64).
• 2024MirageRaft — fault-tolerant Raft in OCaml; 2× throughput, 10× lower memory on MirageOS unikernels vs. Linux VMs.
• 2022–23Phazia — drag-and-drop web builder for mobile apps. TypeScript, React, Rust, MongoDB.