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Salary: USD 174,600 - 213,400 / annual
Mixpanel is seeking a Senior Software Engineer to join its newly formed AI Platform team, which sits at the center of the company's AI-first analytics vision. The team has a greenfield charter to build infrastructure that accelerates AI product development both internally and for customers.
You will be responsible for designing and developing scalable, secure, and reliable backend services, APIs, and microservices that enable product teams to leverage AI models effectively. Key responsibilities include:
- Platform Architecture: Design core backend services and microservices for secure AI model access
- Agent Orchestration: Build scalable frameworks supporting multi-step agent workflows, task decomposition, tool invocation, and persistent memory
- Evaluation & Reliability: Develop robust evaluation systems to measure reasoning quality, hallucination rates, and task success
- Operational Excellence: Architect high-performance serving infrastructure with strict guarantees around latency, throughput, cost-efficiency, and error handling
- Observability & MLOps: Ensure comprehensive monitoring, structured logging, and distributed tracing across deployed AI models
- Collaboration: Partner with designers, product managers, and engineers to build self-serve infrastructure
- Leadership: Advocate for software engineering best practices, conduct design and code reviews, and mentor junior engineers
The role requires 2+ years of professional software engineering experience with strong full-stack fundamentals across frontend, backend, and data layers. You should have hands-on experience integrating and orchestrating LLMs and agents, building AI-native systems in production, and familiarity with optimization techniques including eval frameworks, agent tooling, vector search, context engineering, and prompt engineering. A Bachelor's degree in Computer Science, Mathematics, or related field (or equivalent practical experience) is required. You'll work in a small, fast-paced team with a mandate to empower AI development across Mixpanel.
