Senior Software Engineer, AI Platform

Mixpanel is hiring a Senior Software Engineer to join the AI Platform team, a newly formed group at the center of the company’s AI-first analytics vision.

About the Team

The AI Platform team is building infrastructure that accelerates and transforms AI product development at Mixpanel, both internally and for customers.

They provide tools to improve AI products, enabling internal teams and customer agents to build things that were previously unimaginable. The team builds shared infrastructure that is essential for developing AI features with confidence and speed, and that gives every agent the tools, context, and quality guarantees to act autonomously on behalf of users.

Examples of what the team is building

• Agent Optimization Framework: A measurement and tuning system for Mixpanel AI that uses evals and metrics from production to optimize for speed, quality, and cost across a wide range of use cases.
• AI Agent Integrations and Accessibility: Products and tools that bring the power of Mixpanel to wherever it is most effective for customers, including a Mixpanel slackbot and a public skills library.
• Automatic Generation of AI Inputs: Infrastructure to provide input to LLMs, such as context windows, with relevant customer and behavioral data that elevates agent performance.

Role Overview

The Senior Software Engineer will be responsible for building scalable, secure, and reliable infrastructure that accelerates AI agent development. This person will be a leader and key contributor in a small, fast-paced, newly formed team with a mandate to empower AI development across the company.

Responsibilities

• Design and develop core backend services, APIs, and microservices that enable product teams to easily and securely leverage AI models.
• Build scalable frameworks and tools to support multi-step agent workflows, including task decomposition, tool invocation, and persistent memory.
• Build robust evaluation systems to continuously measure reasoning quality, hallucination rates, and task success.
• Architect high-performance serving infrastructure with strict guarantees around latency, throughput, cost-efficiency, and error handling.
• Ensure comprehensive monitoring, structured logging, and distributed tracing across all deployed AI models.
• Partner with designers, product managers, and other engineers to build self-serve infrastructure that transforms the AI development cycle.
• Advocate for software engineering best practices, conduct thorough design and code reviews, and mentor junior engineers.

We're Looking For Someone Who Has

• Bachelor's degree in Computer Science, Mathematics, a related field, or equivalent practical experience
• 5+ years of professional software engineering experience
• Strong full-stack fundamentals, with comfort working across frontend, backend, and data layers
• Excellent debugging and technical investigation skills
• Strong technical communication, ideally with experience collaborating in an asynchronous remote environment
• Ability to move fast and iterate in ambiguous environments, taking ownership and focusing on delivering value to users
• Hands-on experience integrating and orchestrating LLMs and agents
• Experience building AI-native systems, including iteratively improving and scaling them in production
• A desire to be at the forefront of leveraging AI to drive product improvement, observability, and product analytics at scale

Benefits and Perks

• Comprehensive Medical, Vision, and Dental Care
• Mental Wellness Benefit
• Generous Vacation Policy and Additional Company Holidays
• Enhanced Parental Leave
• Volunteer Time Off
• Additional US Benefits: Pre-Tax Benefits including 401(K), Wellness Benefit, Holiday Break

*please note that benefits and perks for contract positions will vary*

Culture Values

• Make Bold Bets: We choose courageous action over comfortable progress.
• Innovate with Insight: We tackle decisions with rigor and judgment - combining data, experience and collective wisdom to drive powerful outcomes.
• One Team: We collaborate across boundaries to achieve far greater impact than any of us could accomplish alone.
• Candor with Connection: We build meaningful relationships that enable honest feedback and direct conversations.
• Champion the Customer: We seek to deeply understand customers’ needs, ensuring their success is our north star.
• Powerful Simplicity: We find elegant solutions to complex problems, making sophisticated things accessible.