Full Stack Engineer

About Influxion

Influxion is building an AI engineer: an autonomous teammate that continuously monitors, debugs, and improves AI agents in production.

AI agents are performing increasingly complex work, creating a growing operational burden for teams. Understanding what an agent did, investigating failures, uncovering unexpected behavior, and improving quality requires reasoning across thousands of steps, tool calls, model decisions, traces, evaluations, logs, and code. As agents grow more capable and organizations rapidly increase their deployment, it's becoming impossible for humans to manage using traditional tools and techniques.

Our thesis is that AI must manage AI. Influxion combines state-of-the-art AI with systems and performance engineering to deploy teams of specialized agents across the production AI stack. These agents work together to process and reason over massive volumes of semantic, qualitative data, automating complex AI engineering work at scale.

Influxion is a venture-backed startup based in San Francisco at an eight-figure pre-seed valuation, with core technology and a working product that now needs to scale.

About the role

We are now looking for an early Full-stack Engineer to help take the product to enterprise-grade production and scale.

This person will have broad ownership across the product stack, building user-facing product experiences, backend systems, APIs, integrations, data infrastructure, and the foundations required to run complex agentic systems reliably at enterprise scale.

This is an opportunity to join at an early stage, work directly with the founders, and help shape the product that will become essential as AI agents proliferate.

Please reach out if this sounds like you—or someone exceptional you know.

Possible Week 0 Projects

• Build and productionize core product workflows across the frontend and backend
• Improve authentication and core database infrastructure
• Build product infrastructure for usage/cost tracking and billing
• Develop new product and infrastructure integrations
• Improve testing, deployment, and release practices

First 30 days

• Ship new customer-facing product features across the stack
• Improve agent reliability, failure recovery, and visibility into agent behavior
• Take ownership of backend services, APIs, data models, and product integrations
• Improve frontend product experiences for investigating, understanding, and managing AI agents
• Strengthen testing, observability, monitoring, and deployment practices
• Partner with the team and early customers to identify and solve high-priority product problems

First 90 days

• Own major product areas end-to-end, from product design through implementation and production operation
• Partner directly with early customers to build and refine workflows for enterprise pilots
• Improve the reliability, scalability, and operational health of the production product
• Build new product capabilities, integrations, and infrastructure as customer needs evolve
• Introduce safeguards and product controls for tenant isolation, agent resource usage, costs, and failure handling
• Improve the architecture, tooling, and engineering practices needed to support additional customers and engineers
• Help establish repeatable patterns for building, testing, deploying, and operating new product capabilities

We're Looking for someone who

• Has prior startup experience designing and implementing production software
• Has strong full-stack engineering experience, with the ability to work across frontend, backend, and infrastructure
• Is independent, moves fast, and is adaptable to changing priorities and information
• Thrives in ambiguous, fast-changing environments
• Is constantly thinking, evaluating, prioritizing, and is willing to push back and offer alternatives
• Tolerates grunt work necessary to improve the product and customer experience
• Has experience with and wants to work directly with customers/users
• Cares about product quality, reliability, and the details of the user experience
• Enjoys operating with high ownership and limited process

Technical Experience

• Python and TypeScript
• React and full-stack product development
• Backend services, APIs, and integrations
• Postgres database architecture and operations
• Authentication and authorization systems
• Redis and distributed systems
• Observability/monitoring, reliability, backup, and recovery
• Test infrastructure and release automation
• Strong AI-assisted coding skills - using it as a productivity multiplier, not a substitute (know its limitations and when not to use it)
• Experience building with or deploying AI agents

You do not need to have worked with every technology in our stack. We care more about strong fundamentals, ownership, learning speed, and demonstrated experience building and operating customer-facing production systems.

Interview Process

• 30 min call with each founder
• Technical screening
• 3–5 day work trial
• Offer