Arash Delijani

Hi, I’m a research engineer interested in ML and data infra.


I was most recently at Harvey, building LLM-based products and evaluations for legal tasks.

Before Harvey, I was at Twitter, working on distributed training for recommender models, including the Twitter timeline algorithm. I stayed on the slimmed down ML team at X post-acquisition to work on ML modeling and infrastructure (pytorch, torchrec, dataflow, Slurm).

Prior to Twitter, I was the first founding engineer at Semgrep, working on a code analysis platform now used by 100s of companies.

I studied computer science at MIT as an undergrad and stayed on as an MEng student, working on algorithms for time-series modeling and anomaly detection. I was a Google intern and a KP Fellow.

I like working with talent-dense teams with a strong long-term vision.


(Last update: March 2025)


Send me a note if you're interested in working together.

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