Founding Infrastructure Engineer

CocoIndex Inc; Sunnyvale (CA); Hybrid; USD 180,000 - 260,000; Full time

Job summary

CocoIndex Inc. in Sunnyvale, California, is seeking a Founding Infrastructure Engineer to define and build the core systems that keep agent knowledge current and enable teamwork across complex projects.

You will own the core infrastructure, push for reliability and performance, and collaborate with founders to shape the product and culture. As a senior contributor, you’ll shape the infrastructure strategy, own multi‑part systems end-to-end, and drive maintainability and scalability while

Qualifications

• Four core qualities: Infrastructure experience is a bonus.
• Taste for developer tools: you recognize usefulness over hype, weigh tradeoffs, and use AI judiciously.

Responsibilities

• Build and improve the incremental engine that keeps context fresh for agents.
• Rethink the infrastructure and interactions that help agents and humans work together.
• Enable agents to share findings, respond to changes, and resume work when needed.
• Work with the founders to shape the product’s direction and the company’s culture.

Skills

Taste for developer tools

Logical thinking

Ownership

Curiosity

Job description

# Founding Infrastructure EngineerEmployment type: Full-timeDepartment: EngineeringOpen positions: 2Location: **Sunnyvale, California** Preferred.: Hybrid Senior/Staff engineers only, with experience working remotely with a team.: Remote Senior/Staff engineers only, with experience working remotely with a team.Overview Application ## About us**Build the foundation for collective intelligence.**Complex projects require continuity. One agent discovers somethinganother needs. A decision depends on evidence that may change. Workpauses for a teammate, a test, or a human response, then needs tocontinue with an accurate understanding of what happened.We’re building CocoIndex to provide that continuity: shared knowledgethat stays connected to its sources, findings that other agents canbuild on, and coordination that brings agents back into the workwhen they are needed.Our foundation is an incremental engine that maintains derived dataas its inputs change. We want to extend that foundation into theinfrastructure for sustained collaboration, connecting changes inthe world to changes in what agents know and what they do.We’re starting with software engineering, where we can measure whetheragents repeat less work, catch outdated assumptions, and completeprojects more reliably.## The roleBuild the infrastructure that keeps agent knowledge current and helps agents work together on complex projects. As a founding engineer, you’ll work with us definingthe future of the infrastructure and the company.## What you’ll work on* Build and improve the incremental engine that keeps context fresh for agents.* Rethink the infrastructure and interactions that help agents and humans work together.* Enable agents to share findings, respond to changes, and resume work when needed.* Work with the founders to shape the product’s direction and the company’s culture.## What we’re looking forFour core qualities. Infrastructure experience is a bonus.* ### Taste for developer tools Chase taste and not hype. You recognize the difference between a compelling demo and something useful to developers. You question unnecessary complexity, choose tradeoffs deliberately, and use AI with your own judgment. You keep developing your taste by studying good products, seeking critique, and reflecting on your decisions.* ### Logical thinking You reason through complicated systems and stay logically consistent. You break unfamiliar problems into parts, follow how state changes, and test the assumptions that could break a design. You can write and debug code yourself and explain why it works. AI is part of the toolkit; understanding and verifying the result remain your responsibility.* ### Ownership You own something end to end. You have built something and taken it to production. You have been the go-to person for a project or a team.* ### Curiosity You want to understand what happens underneath the interface. You follow a surprising result, chase a bug, or notice a missing piece before someone assigns it to you. You are a proactive learner who challenges assumptions and reasons about what comes next for the system.* Bonus ### Infrastructure experience A plus, not a requirement. Experience building databases, compilers, build systems, runtimes, distributed systems, or developer tools is a plus. You’ve worked through questions of correctness, performance, concurrency, or recovery and can explain the tradeoffs. Strong fundamentals and the ability to learn deeply matter even if your previous work was in another domain.Apply for this role