Platform Engineer

Flux • San Francisco, CA

37d • Remote

About The Position

Flux is building the world’s first AI Hardware Engineer, and that means everything around it has to just work. As a Senior Platform Engineer, you’ll report to Jeff Wilde (Head of Engineering) and own the full-stack systems that power Flux’s platform experience beyond the editor: billing, authentication, onboarding, and integrations. You’ll ship production features that touch every user, keep the lights on, and make it possible for Flux to scale.

Requirements

• 5 + years of professional software engineering experience.
• Strong proficiency in TypeScript, Node.js, and React.
• Experience integrating and maintaining 3rd party APIs.
• Proven track record shipping production full-stack web apps.
• Familiarity with cloud hosting (GCP/AWS/Firebase) and CI/CD basics.
• Strong debugging and cross-system troubleshooting skills.
• Excellent written and verbal communication; thrives in async, remote teams.

Nice To Haves

• Experience with multi-tenant SaaS or collaborative web platforms.
• Familiarity with auth frameworks (OAuth, JWT, Firebase Auth).
• Exposure to observability stacks (Sentry, Datadog, Grafana).
• Prior experience building internal tools or admin dashboards.
• Startup or 0 → 1 product-building experience.

Responsibilities

• Build and maintain user-facing platform features (billing, auth, onboarding, settings).
• Integrate and maintain third-party APIs (Stripe, Firebase, analytics).
• Write TypeScript/Node backend services and React frontend components.
• Improve reliability and performance of core platform flows.
• Implement observability, logging, and error-tracking standards.
• Collaborate across teams to design APIs that support new products and integrations.
• Document architecture and best practices for your domain.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed