Flex
Senior Full Stack Engineer
$180K–$225K
Santa Clara, CA · On-site · Senior · Full-time · Posted Mar 23, 2026
- Experience
- 5+ years building full-stack applications.
- Education
- Bachelor's and/or Master's degree.
About the job
Build and operate end-to-end features for FlexAI’s compute infrastructure platform, spanning user interfaces, backend services, data models, and infrastructure integrations.
What you'll do
- Build platform features across developer tools, marketplace, billing, and admin modules.
- Develop React interfaces and APIs or backend services using Python (FastAPI) and/or Node.js.
- Design frontend-backend contracts and optimize data-intensive workflows and performance across the stack.
What they ask for
- 5+ years of experience building full-stack applications.
- Bachelor's and/or Master's degree.
- Strong React skills and Python (FastAPI or similar) or Node.js experience.
- Experience designing and working with APIs; familiarity with data models, async workflows, and scalable systems.
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.
Pay
USD 180,000–225,000 per year (base salary)
Tools
React, Python, FastAPI, Node.js, Kubernetes, CI/CD
AI focus
Build products for an AI compute infrastructure platform; comfortable leveraging AI coding tools and agents to move faster.
Model-written summary · the original posting is authoritative