Senior Platform Engineer
Flux
full-time
Posted on:
Location Type: Hybrid
Location: San Francisco • California • United States
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Job Level
About the role
- 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.
Requirements
- 8+ 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.
- 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.
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard skills
TypeScriptNode.jsReactAPI integrationdebuggingcross-system troubleshootingobservabilitycloud hostingCI/CDmulti-tenant SaaS
Soft skills
written communicationverbal communicationcollaborationproblem-solvingadaptability