Senior AI Platform Engineer (AI)

Location: San Francisco, United States; on-site in the designated Suno SF office 5 days a week. Applicants must be eligible to work in the US.

Base salary: $228K–$363K annually, plus equity.

Company

A consumer entertainment company building an AI music and creative entertainment platform used by millions of people, from casual creators to professional musicians.

What you will do

• Design and build platform APIs and SDKs used by engineering teams to create agent features.
• Develop shared evaluation infrastructure, including an evaluation runner, results storage, and dashboards, and help determine what to build versus buy.
• Implement end-to-end tracing and observability so requests can be followed across services from prompt to audio.
• Manage model provider routing, fallbacks, rate limits, and cost controls.
• Partner with engineering teams to onboard them through documentation and hands-on support, and work with Infrastructure on agent-runtime reliability and scale.
• Improve the speed and safety of shipping agent features across the platform.

Requirements

• 4–6 years of experience building and scaling backend or platform systems in production, in any language.
• Experience supporting other developer teams, including building a platform, API, or SDK adopted by other teams.
• Experience with production LLM or agent systems for external or internal users.
• Strong experience with distributed systems and observability, including tracing across services.
• Comfort working with internal customers by scoping work with partner teams, earning adoption, and handling ambiguity.
• Eligibility to work in the United States and ability to work on-site in the San Francisco office 5 days per week.

Nice to have

• Experience building an evaluation or tracing product.
• Experience running LLM gateway or model-routing infrastructure.
• Experience writing SDKs used by other teams.
• Experience with Python backends.

Culture & Benefits

• Fast-paced environment with high ownership, intensity, and focus on product quality.
• Company equity package.
• 401(k) with a 3% employer match, Roth 401(k), and medical, dental, and vision insurance with PPO, HSA, and FSA options.
• 11 paid holidays, unlimited PTO and sick time, and 16 weeks of paid parental leave.
• Creative education stipend, commuter allowance, and in-office lunch 5 days per week.