Founding Engineer

Limrun (YC P26); San Francisco (CA); Hybrid; USD 150,000 - 210,000; Full time

Benefits offered by this job

Remote-friendly environment

San Francisco office in South Park (re

Relocation support

Regular team offsites

Company-covered work travel

Job summary

Limrun, an early-stage company backed by YC, is expanding its cloud platform. We are hiring an engineer to build and scale tools and services, own projects from design to maintenance, and participate in on-call incidents to improve reliability and performance.

You will work on Go services and Kubernetes controllers, focusing on reducing startup times, optimizing compute use, and strengthening security with isolation and access controls.

Qualifications

• You’ve built, operated, and scaled production cloud infrastructure.
• You’ve written and maintained Go services in production.
• You understand Kubernetes architecture and controller patterns.
• You can investigate failures across application code, networking, and operating systems.
• You’ve shipped production software or infrastructure using AI-assisted development.

Responsibilities

• Build and launch new tools, features, and cloud services behind them.
• Reduce startup times, improve scheduling, and optimize compute usage as demand grows.
• Build and maintain tenant isolation, access controls, and networking for customer workloads.
• Automate host provisioning, upgrades, and recovery from failures.
• Collaborate with customers to turn problems into better APIs and tooling.

Skills

Cloud infrastructure

Go programming

Concurrency

Kubernetes

Debugging

AI-assisted development

Tools

CI systems

APIs/SDKs/CLIs

Job description

Help us expand what AI agents can build. Limrun runs development tools and applications as cloud services that agents can use from wherever they run. We’re hiring an engineer to build and scale that platform.

The role

You’ll help decide what to build and own projects from design through ongoing maintenance. You’ll also join the on-call rotation, investigate production incidents, and fix their causes.

What you’ll do

• Build and launch new tools, features, and cloud services, including the Go services, APIs, and Kubernetes controllers behind them.
• Reduce startup times, improve scheduling, and make better use of compute as demand grows.
• Build and maintain the tenant isolation, access controls, and networking that protect customer workloads and data.
• Automate host provisioning, upgrades, and recovery from failures.
• Work with customers to understand their workflows and turn problems they encounter into better APIs, tooling, and product features.

What we’re looking for

• You’ve built, operated, and scaled production cloud infrastructure, with responsibility for deployment, observability, and reliability.
• You’ve written and maintained Go services in production and can reason about concurrent code.
• You understand Kubernetes architecture and controller patterns well enough to build on them and debug their behavior.
• You can investigate failures across application code, networking, and operating systems.
• You’ve shipped production software or infrastructure using AI-assisted development.

We care about your work and the responsibility you’ve taken for it more than titles or years of experience.

Nice to have, not required

• Experience with sandboxing, virtual machines, or managing Linux and macOS hosts.
• Hands-on work with DNS, routing, proxies, tunnels, or private networking.
• Experience building APIs, SDKs, CLIs, CI systems, or remote build tools.
• Experience using or building AI agents for platform maintenance and production operations.
• Familiarity with mobile development workflows using simulators and emulators.

Why Limrun

As an early engineer, you’ll work directly with the founder to decide what Limrun builds next. Each new service can open up more development workflows to agents. You’ll help establish how the engineering team works, with room to take on broader responsibilities as the company grows.

We’re a small team using AI to tackle big infrastructure problems. Limrun gives you room to explore how far AI can take your engineering work, test ideas, and see the results in systems that developers and agents depend on.

What we offer

• A remote-friendly environment with flexible working hours.
• A San Francisco office in South Park, with relocation support.
• Regular team offsites.
• Company-covered work travel across Europe and the US.