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FlexAIFlexAISanta Clara, CA

Senior Full Stack Engineer

Build end-to-end features for AI compute platform including React UIs, Python/Node.js APIs, data workflows, and compute integrations. Requires 5+ years full stack experience, React, Python/FastAPI or Node.js, and startup environment comfort.

Salary not listed
On-site5+ YOEFullstack Engineering

About the role

What You’ll Do

  • Build and ship end-to-end features across our platform (developer tools, marketplace, billing, admin)
  • Develop high-performance UIs using React
  • Design and implement APIs and backend services using Python (FastAPI) and/or Node.js
  • Define clean, scalable contracts between frontend and backend
  • Work on data-intensive workflows (jobs, compute orchestration, resource management)
  • Collaborate with platform and infrastructure teams to build reliable systems
  • Debug and optimize across the stack — from UI to backend performance
  • Own features end-to-end: design, build, ship, and operate

What You’ll Need to Be Successful

  • 5+ years of experience with a Bachelor's and/or Master's degree building Full Stack applications
  • Strong skills in:
    • Frontend: React (modern stack)
    • Backend: Python (FastAPI or similar) or Node.js
  • Experience designing and working with APIs
  • Comfortable with data models, async workflows, and scalable systems
  • Ability to operate independently and move fast with high ownership
  • Strong communication and collaboration skills
  • Experience working in startup environments
  • Comfortable leveraging AI coding tools and agents to move faster

Nice to Have

  • Experience with cloud platforms, developer tools, or compute systems
  • Familiarity with Kubernetes, CI/CD, and observability
  • Exposure to billing, licensing, or marketplace systems

What We Offer

  • A competitive salary and benefits package
  • Work on cutting-edge AI infrastructure
  • Build products used by developers and enterprises
  • High ownership, fast execution, real impact
  • Collaborative, high-caliber team

Skills

ReactPythonFastAPINode.jsAPIsKubernetesCI/CDData ModelsAsync WorkflowsCloud Platforms
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