BASED IN NEW YORK

Software engineer.
Currently at Meta.

I’m Arjun. I work on Instagram, where I’ve built ranking infrastructure and now lead engineering workstreams that help small businesses grow.

Open to software engineering opportunities.

EXPERIENCE

Selected work

Product engineering, backend systems, and the space between them.

Meta / Instagram

Senior Software Engineer

2021 — PRESENT

GROWTH & PRODUCT ENGINEERING

01

Helping small businesses
find their next customer.

Leading engineering workstreams for Instagram Boost, from product direction to technical execution. Building advertiser acquisition, ad creation, and campaign management experiences.

$10M+incremental revenue driven
Project details

Campaign scaling. Led ML-driven recommendations to increase budgets or extend high-performing campaigns, including backend eligibility logic, APIs, and the end-to-end experience.

Media recommendations. Built recommendations using Instagram Insights to identify promising organic posts for advertisers to boost.

PHP / Hack · Python · Instagram Insights APIs

RANKING & INFRASTRUCTURE

02

A better feed.
A more efficient system.

Built ranking infrastructure for Instagram Reels, Explore, and Feed. Improved personalization and real-time signals while making ranking less expensive to run.

0.1%+increase in overall Instagram time spent
Project details

Improved Reels ranking through personalized parameters, real-time signal integration, and pagination optimizations.

Reduced Meta compute capacity usage by hundreds of kW through off-peak ranking precomputation, caching improvements, and lower-cost queries.

Python · Ranking systems · Caching

University of Illinois Urbana-Champaign

Master of Computer Science · B.S. in Computer Science

Also spent time teaching data structures and computer architecture.

OFFLINE

Outside work

Outside work, I love spending time with my wife and friends—exploring New York and its food scene, playing sports, hiking, or cooking together. I also enjoy running and am always rooting for the Bears and Bulls.

CONTACT

Say hello.

I’m open to software engineering opportunities.
Or a good NYC restaurant recommendation.

me@arjunarun.com