Senior Machine Learning Engineer, Ads Optimization

Remote - United States · Remote · full time · Senior

$216,700 – $303,400

Listed on Reddit’s own careers site. You apply with them directly — we never stand between you and the employer.

What this role is

Join Reddit's Ads Optimization team to develop machine learning systems powering the platform's auction, bidding, and budget allocation mechanisms. This role suits engineers with optimization expertise who want to work on high-scale marketplace problems balancing advertiser performance, user experience, and revenue.

Our summary, not Reddit’s wording. The full posting is on their site.

Skills this role names

What they ask for

Required

3–5+ years building, deploying, and operating ML systems in production
Strong programming in Python, Java, Go, or similar
Experience designing scalable data processing systems
Ability to translate business problems into optimization solutions and improve measurable metrics
Quantitative background (math, physics, finance, economics, operations research) or equivalent work experience
Comfort with custom optimization logic and constraint handling

Nice to have

Experience with advertising, auction systems, online marketplaces, or search/ranking at scale
Work in bidding, pacing, budget optimization, or auction/mechanism design
Familiarity with large-scale real-time decision systems and low-latency production
Background in feature engineering, model optimization, and production ML monitoring
Cross-functional collaboration experience in Ads or marketplace contexts
Advanced degree (MS or PhD) in CS, ML, Operations Research, Applied Math, or related field