Senior Full Stack Engineer

FlexAI

Santa Clara (CA)

On-site

USD 120,000 - 160,000

Full time

14 days+

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Benefits offered by this job

Competitive salary and benefits package

Opportunity to work on cutting-edge AI infrastructure

High ownership and real impact

Job summary

A cutting-edge AI infrastructure company in California is seeking a Senior Full Stack Engineer to develop end-to-end features for their PaaS platform. You will work on high-performance UIs and backend services, ensuring seamless integration between systems. Ideal candidates will have over 5 years of experience in full stack development, proficient in React for the frontend and Python or Node.js for the backend. This role offers a competitive salary along with a chance to innovate in the AI space.

Qualifications

5+ years of experience building Full Stack applications.
Strong experience with React and modern frontend development.
Proficient in Python (FastAPI) and Node.js for backend development.

Responsibilities

Build and ship end-to-end features across our platform.
Develop high-performance UIs using React.
Design and implement APIs and backend services.

Skills

React (modern stack)

Python (FastAPI or similar)

Node.js

API design

Data models

Async workflows

Scalable systems

Strong communication

Collaboration skills

Startup environments

Education

Bachelor's degree

Master's degree

Tools

Kubernetes

CI/CD

Job description

Build and Deploy AI the right way, anywhere.

The FlexAI Compute Infrastructure Platform provides an \"end-to-end AI compute layer\" for running and managing workloads across any cloud, any GPU, and any deployment model (public, hybrid, or on-prem). It brings together \"1-click simplicity\" for users with \"enterprise-grade orchestration, security, and automation\" under the hood.

Founded by Brijesh Tripathi , who bring experience from Nvidia, Apple, Tesla, Intel and Zoox, FlexAI is not just building a product – we’re shaping the future of AI. Our teams are strategically distributed across Silicon Valley and Bengaluru, united by a shared mission: to deliver more compute with less complexity.

If you're passionate about shaping the future of artificial intelligence, driving innovation, and contributing to a sustainable and inclusive AI ecosystem, FlexAI is the place for you !

Role Overview

FlexAI is looking for a Senior Full Stack Engineer who can build end-to-end features across our PaaS platform — including frontend UI layers, backend APIs, data models, and integrations with compute and infrastructure systems. You will work on developer modules Admin modules, Marketplace, and Licensing, shaping the user experience and backend logic.

This position is In-Person and located at our San Jose, CA Office.

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