I'm a Software Engineer based in New York working at Jane Street.

Work
Tools & Compilers @ Jane Street, Software Engineer
Starting August 2025
Cinder @ Meta, Software Engineer
August 2023 — July 2025
  • Enabling free-threaded Python on Meta's inference platform by making first- and third-party code thread-safe, coordinating externally with the OSS community.
  • Worked on Static Python, an experimental Python compiler, to optimize bytecode using type annotations, expanding coverage to 55% of Instagram's server code — improving performance by 15%, increasing developer confidence in type annotations, and enabling the automated transpilation of Python to Hack.
  • Implemented compiler features and patched bugs in multiple inheritance, class attributes, and match statements.
  • Identified new adoption opportunities for Static Python, including AI workloads, and led roadmap planning to drive the project's strategic direction across the company.
  • Discovered and resolved bugs in Instagram's codebase caused by insufficient test coverage, collaborating with IG DevX to strengthen system reliability and prevent major outages.
  • Created comprehensive documentation and guided coworkers through onboarding.
Polyglot Toolkit @ Meta, Software Engineer
September 2021 — August 2023
  • Worked on a compiler that is written in Rust and that generates hyper-efficient direct-bindings between language pairs (C++, Rust, Python, Haskell, Go, Java)
  • Improved Instagram server's performance by 1.5% by migrating several critical, highly-performance sensitive codepaths to use bindings generated by the compiler — totaling >300 million requests per second and responsible for >15% of Instagram's CPU usage
  • Implemented the manipulation of data structures across the language boundary, including hash maps, hash sets, vectors, etc., by looking at assembly generated by clang and performing low-level memory transmutations.
Machine Translation @ Meta, Software Engineer
September 2021 — August 2023
  • Productionalized mBART multilingual neural machine translation model for usage within Facebook's stack of translation services
  • Fine-tuned models to achieve significant increase in BLEU scores
  • Model significantly improved translation performance for underserved languages
HR Analytics @ HCA Healthcare, Software Engineer Intern
May 2019 — December 2019
  • Designed a web application using React, Golang, and Microsoft SQL Server
  • Application analyzed and predicted nurse turnover, transfers, and hiring using statistical models of an inverted labor market
  • Application deployed to 180+ hospitals across the USA to manage 80k+ employees and continues to be used by regional and corporate HR VPs to facilitate overall company growth

© Aditya Pillai 2025

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