Back End Developer

About the company

A venture-backed startup (about $26M raised, under 20 people) building the ad network for AI-native products. AI chat apps and developers use its SDK to show native sponsored content inside conversations and earn revenue from their free users, without hurting the user experience.

What you'll do

• Ship foundational backend code on a small, fast team
• Build scalable data models and design abstractions for new chat-native ad formats
• Evolve the real-time auction and ad-decisioning systems
• Own services end to end, from design through production and optimization

What we're looking for

• 3+ years as a backend engineer
• You've owned production backend services end to end and taken them through the full development lifecycle more than once
• Experience with some of: Ruby on Rails, Python, PostgreSQL, Redis, Kafka, ClickHouse, Terraform, AWS
• Bonus: early-stage startup or founding experience, trading firm experience, or ad tech and bidding systems

Details

• Hybrid in San Francisco, with about one team onsite per quarter. No relocation support
• $180K to $250K base
• Open to visa transfers (e.g., OPT, H-1B transfers)

Apply through the link to answer one quick question about the role. Strong fits get a short call with our recruiter, who will share the company name and next steps.