AA

Hackathon Winner

CalHacks / HackHarvard / HackCMU

Engineer / Researcher / Builder

Aarush
Agarwal

MLE @ Shopify/AI @ CMU
Venture @ Felicis

Aarush Agarwal
Pittsburgh, PA
01Systems / Intelligence

Research

CMU Language Technologies Institute

Jan 2026 – Present

CMU Language Technologies Institute

Researching dynamic Mixture-of-Experts architectures under Chenyan Xiong, developing adaptive strategies that expand model capacity on out-of-distribution data while mitigating reasoning degradation in continual pretraining.

Designing autonomous research agents that propose, execute, and evaluate model-adaptation experiments across tasks and modalities including vision, clinical, and financial time-series data, iteratively committing variants that improve reasoning and task-benchmark performance over dense backbones.

CERN

Aug 2024 – Oct 2025

CMU Cosmology Laboratory & CERN

CUDA Researcher

First-authored FastGraph, a GPU-resident differentiable k-nearest neighbor algorithm with custom CUDA kernels for low-dimensional graph neural network workflows. FastGraph accelerates graph construction in 2–10D spaces with a bin-partitioned, fully GPU-resident architecture and achieves 20–40× speedups over FAISS, ANNOY, and SCANN.

Engineered PyTorch autograd and gradient operations in C++/CUDA and integrated JIT serialization, reducing KNN runtime by an additional 10% and enabling end-to-end differentiability inside GPU training pipelines.

02Industry / Practice

Experience

Machine-learning engineering and investment work across commerce, fraud, search, and early-stage technology.

Shopify

May 2026 – Aug 2026

Shopify

Machine Learning Engineer Intern

Search Relevance: Developing ranking systems for Shopify's commerce search stack. Fine-tuning and distilling LFM 2.5 models, then deploying them for low-latency DNN inference on custom Triton serving infrastructure.

Merchant-Aware Ranking: Designed and implemented a novel auxiliary merchant-aware training objective that teaches the ranker to prioritize a merchant's first-party catalog for merchant-intent queries. Improved a core merchant-search relevance metric by 10% while reducing the ranking prominence of third-party resellers.

Felicis

January 2026 – June 2026

Felicis

Venture Fellow

Selected as a Venture Fellow in a highly competitive program focused on leveraging AI and technology for real-world impact.

Conducted startup diligence and market research across AI and emerging technology. Co-organized VentureHacks, a Felicis × CMU hackathon that attracted 500+ applicants and awarded $10K+ in prizes, with speakers including Felicis partners and a founding researcher at Skild AI.

Shopify

May 2025 – Aug 2025

Shopify

Machine Learning Engineer Intern

Fraud Detection: Improved buyer-fraud detection accuracy by 3% and reduced training iteration time by 70% through dimensionality reduction, importance-based feature pruning, and BigQuery/Dataflow + Vertex AI pipeline rebuilds.

AI Agent Network: Co-filed a patent for a distributed multi-agent system that decomposes tasks with a Neo4j dependency graph and executes subtasks across specialized agents in parallel.

Sequence Modeling: Designed transformer-based fraud models with embeddings and temporal attention over transaction sequences.

03Selected Work

Projects

A focused set of systems that connect models, hardware, and interfaces to real outcomes.