Infrastructure Engineer

Flint; San Francisco (CA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

20 PTO days

Full health benefits

Dog friendly

Lunch and snack bar

Competitive salary + equity

Job summary

Flint is seeking a talented engineer in San Francisco to manage cloud architecture and improve the coordination of background agents. You'll be responsible for making systems production-grade, focusing on observability, security, and reliability.

The ideal candidate has experience scaling products, strong cloud skills, and can enhance existing infrastructures seamlessly. Benefits include 20 PTO days, health coverage, and a dog-friendly office.

Qualifications

• Experience scaling a product through real user growth.
• Strong background in cloud infrastructure.
• Ability to enhance existing infrastructure without documentation.

Responsibilities

• Own the systems that power cloud architecture and deployments.
• Coordinate multiple background agents in parallel.
• Implement observability and incident response for reliability.

Skills

Cloud (AWS or GCP)

Containers (Docker/Kubernetes)

Infrastructure as Code (Terraform or Pulumi)

System performance and reliability

Job description

Team of ~10, in‑person in SF.

The role

Flint runs background agents that make changes to real codebases and serves AI‑generated pages at scale. That creates an infra problem most companies don’t have: many agents editing code in parallel, and you have to coordinate, merge, and ship their work without it turning into chaos.

You’ll own the systems that power all of it: cloud architecture, CI/CD, deployments, observability, and security. It’s a 0‑to‑1 role: you’ll inherit a scrappy setup and make it production‑grade.

Recent work in this role: synchronizing and merging the git output of parallel background agents, building observability for agentic workloads, and hardening deployment pipelines.

What you’ll own

• The concurrency and coordination problems of running many background agents in parallel, the core hard problem of this role.
• Cloud infrastructure end‑to‑end: architecture, provisioning, CI/CD, deployments.
• Cutting latency and cost as we scale, without trading off reliability.
• Observability and incident response, so we know when things break before users do.
• Security across the stack and deployment pipelines.
• Making it easy for product engineers to deploy confidently and debug fast.

You're a fit if

• You’ve scaled a product through real user growth and know what breaks, and when.
• You’re strong with cloud (AWS or GCP), containers (Docker/Kubernetes), and IaC (Terraform or Pulumi).
• You think in systems, performance, reliability, and cost trade‑offs come naturally.
• You can drop into infra you didn’t build and make it better without a runbook.

Bonus

• You’ve been through a startup growth phase.
• Security depth: SOC 2, threat modeling, or pen testing.
• You’ve built self‑service tooling that product engineers actually used.

What we offer

Historic office in Jackson Square (with 2 rooftops and a shower) – tour virtually here

A crazy upside‑down battlestation – tour virtually here

20 PTO days a year and full health benefits

Lunch and a fully stocked snack bar at the office, incl. Cometeer coffee pods

Dog friendly

Competitive salary + equity [we stand by care for our employees]

More benefits coming very soon.