Media Buyer - Creative Testing & Optimization

New York · USD 150,000-250,000 / year · Full-time · Onsite · Posted Oct 1, 2026

At a glance

Kalshi is seeking a hands-on Media Buyer to help scale paid acquisition through disciplined creative testing and daily campaign optimization across Meta, TikTok, Snapchat, X, and demand-side platforms (DSPs).
You will own daily execution by launching over 200 ads each week, identifying winning concepts, moving them into scale campaigns, and directing spend toward top performers.
Working closely with creative and compliance teams, you will keep campaigns fresh and translate performance data into clear recommendations for future testing.

Launch 200+ ads each week accurately and on schedule using an established testing framework, with consistent naming, accurate tracking, and correct targeting and campaign settings.
Evaluate acquisition cost, conversion volume, and spend to determine when an ad has enough data to move into scale campaigns.
Monitor performance, pause underperforming ads once they meet agreed decision thresholds, and direct spend toward the strongest performers.
Track what launched, what worked, what didn’t, and what should be tested next so results inform future decisions.
Give actionable feedback on the hooks, formats, messages, and concepts driving performance, helping the creative team develop stronger briefs and iterations.
Work with creative and compliance teams to ensure assets are approved, correctly formatted, and ready to launch.
Check copy, links, tracking, placements, targeting, and assets before every launch, catching mistakes before they affect performance.

Proven experience buying media and optimizing direct-response campaigns, with strong hands-on skills in Meta and TikTok.
Experience running campaigns on Snapchat, X, and/or DSPs.
A track record of managing high-volume creative testing and turning winning ads into scaled campaigns.
A strong understanding of customer acquisition cost (CAC), cost per acquisition (CPA), and return on ad spend (ROAS).
Sound judgment about when an ad has enough spend and conversion data to scale, continue testing, or pause.
Strong organizational skills and comfort managing hundreds of ads across multiple platforms.
Exceptional attention to detail and the ability to execute quickly while maintaining accuracy.
The ability to turn campaign data into clear recommendations for creative and growth teams.