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Fastapi Python Jobs in California (NOW HIRING)

Principal Software Engineer (Python)

Irvine, CA · On-site +1

$144K - $194K/yr

Utilize Git or similar, Unix command line, Python, FastAPI, FastMCP, and ADK to build and enhance robust backend services that bridge core enterprise data with Agentic AI. * Model Optimization (LLM ...

Principal Software Engineer (Python)

Irvine, CA · On-site

$144K - $194K/yr

Utilize Git or similar, Unix command line, Python, FastAPI, FastMCP, and ADK to build and enhance robust backend services that bridge core enterprise data with Agentic AI. * Model Optimization (LLM ...

AI Engineer

Newark, CA · On-site

$80 - $90/hr

The ideal candidate will have deep expertise in Python , practical experience with LangGraph/LangChain for agent workflows, and proficiency in FastAPI for developing production-grade APIs. This role ...

Strong backend development experience with Python with a track record of clean, maintainable, testable production code. * Production API design & delivery (FastAPI preferred), including versioning ...

Deep expertise in Python (Django, FastAPI, or similar frameworks) and backend architecture, including async programming and microservice design. * Strong background in distributed systems and data ...

Deep expertise in Python (Django, FastAPI, or similar frameworks) and backend architecture, including async programming and microservice design. * Strong background in distributed systems and data ...

Lead AI Engineer

Pleasanton, CA · On-site

$215K - $240K/yr

Reqs 1 yr exp. in Python, LlamaIndex, FastAPI, REST API, JavaScript, AngularJS & SQL. Sal: $215k to $240k/yr. Email resume w/job code (LAIE-2601) to hr@actava.ai.

New

Senior Software Engineer

San Francisco, CA · On-site

$144K - $190K/yr

Company Name: TechCorp Solutions We are looking for a Senior Software Engineer with 5+ years of experience in Python and FastAPI. The ideal candidate will have strong backend development skills and ...

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Fastapi Python information

What is the difference between Fastapi Python vs Django Developer?

AspectFastapi PythonDjango Developer
Primary FocusBuilding high-performance APIsDeveloping full-stack web applications
FrameworkFastapiDjango
Work EnvironmentBackend API services, microservicesWeb applications, content management systems
Required SkillsPython, asynchronous programming, REST APIsPython, Django framework, HTML/CSS, databases

Fastapi Python developers specialize in creating fast, scalable APIs using the Fastapi framework, often for microservices and backend systems. Django developers focus on building comprehensive web applications with integrated features. Both roles require Python, but Fastapi emphasizes performance and asynchronous programming, while Django offers a full-stack solution.

What cities in California are hiring for Fastapi Python jobs? Cities in California with the most Fastapi Python job openings:
Infographic showing various Fastapi Python job openings in California as of July 2026, with employment types broken down into 100% Full Time. Highlights an 46% In-person, and 54% Remote job distribution.
Senior Full Stack AI Developer

Senior Full Stack AI Developer

SolGenie Technologies, INC

San Jose, CA • On-site

Other

Posted 5 days ago

New


Job description

We have a contract opportunity for Senior Full Stack AI Developer (Onsite) with one of our clients. Detailed job descriptions is provided below.

Title: Senior Full Stack AI Developer (React/Next.js + Python + LLM)
Location: Santa Clara, CA (Onsite)
Duration: 9+ Months

Employment Type: W2 or Independent Contractor (No C2C through third-party vendors)

Visa Eligibility: Must-Have Skills:

  • 7+ years of Full Stack Development experience.
  • Strong hands-on experience with React, Next.js, and TypeScript (Mandatory).
  • Experience building production-grade Full Stack applications.
  • Strong backend development experience with Node.js and/or Python (FastAPI preferred).
  • Experience designing and consuming REST APIs and/or GraphQL.
  • Hands-on experience integrating LLM APIs (OpenAI, Claude, Gemini, NVIDIA NIM, etc.).
  • Experience with streaming AI responses using Server-Sent Events (SSE) or WebSockets.
  • Experience implementing AI chat interfaces or conversational applications.
  • Strong understanding of multi-tenant SaaS architecture, Row-Level Security (RLS), and application scalability.
  • Experience building multi-step AI workflows, conversation state management, and tool/function calling.
  • Experience rendering structured JSON outputs in frontend applications.
  • Strong knowledge of responsive UI development, accessibility, and performance optimization.

Technical Skills:

  • Frontend: React, Next.js, TypeScript, Vercel AI SDK
  • Backend: Node.js, Python, FastAPI, REST APIs, GraphQL, SSE
  • AI/ML: LLM Integration, RAG, Nemotron, Structured JSON Generation
  • Cloud: AWS / Azure / Google Cloud Platform
  • Databases: PostgreSQL, pgvector, Redis
  • DevOps: Docker, GitHub Actions

Nice to Have:

  • LlamaIndex
  • LangChain
  • Model Context Protocol (MCP)
  • Vercel AI SDK