Platform Engineer

The Role

Flux is building the world’s first AI Hardware Engineer, and that means everything around it has to just work.

As a Platform Engineer, you’ll work on 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.

What You’ll Do

• 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 You’ll Bring

• 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.

Preferred Qualifications

• 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.

Profile

Impact-oriented: You don't feel done until real people are getting real value from what you built.

• Ambiguity-native: You thrive in the undefined.
• Agentic development is full of half-mapped terrain, soft constraints, and ideas that shift under your feet.
• That energizes you.
• You constantly update your intuitions as you go, and are excited to discover new and better ways to attack challenges we're still finding words to describe.

Collaborative: You share your thoughts early and often, and welcome debate and creative collaboration. Flux is a deeply collaborative company, and we believe that the best ideas can only win if they're said out loud.

• Convention-averse: Flux is an AI-first company.
• We constantly experiment with new workflows, tools, and ways of working together.
• You feel an urgency to reimagine how we create and collaborate in this rapidly changing world, and you value critical thinking far above established conventions.

Ownership mentality: You are a self-starter, bias toward action, and care deeply about the team and community who lean on you and your work.