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Flux AutoFlux AutoSan Francisco, CA

Platform Engineer

Builds and maintains full-stack platform features like billing, authentication, onboarding, and third-party integrations using TypeScript/Node.js/React. Ships production features, improves reliability, and collaborates on scalable APIs for an AI hardware engineering platform. Requires 5+ years experience.

Salary not listed
On-site5+ YOEFullstack Engineering

About the role

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.

Required Qualifications

  • 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.

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.

Skills

TypeScriptNode.jsReactStripeFirebaseGCPAWSOAuthJwtSentryDatadogGrafanaCI/CD
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