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Python Fastapi Developer Jobs in California (NOW HIRING)

SolGenie

Senior Full Stack AI Developer

San Jose, CA · On-site

Senior Full Stack AI Developer (React/Next.js + Python + LLM) Location: Santa Clara, CA (Onsite ... Strong backend development experience with Node.js and/or Python (FastAPI preferred) . * Experience ...

TestingXperts Inc. DBA Damcosoft

Python Developer

San Jose, CA · On-site

$59 - $81.25/hr

Python Engineer Location : San Jose, CA - F2F interview Must No of openings/positions 6 Job Title ... Deep experience with FastAPI, Django AI Tooling: Familiarity with LangChain, LlamaIndex, or similar ...

FlexAI

Senior Full Stack Engineer

Santa Clara, CA · On-site

... 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 ...

SuperDial

Forward Deployed Engineer

Burlingame, CA · On-site

$125K/yr

Design and implement backend services and APIs using Python (FastAPI or similar) * Work directly ... Help shape engineering best practices, mentoring junior developers as we grow About You: * 3+ years ...

E-Solutions, Inc.

Python Engineer

San Jose, CA · On-site

Python Engineer - Number of Openings: 6 Key Responsibilities: - Design, develop, and maintain high-performance APIs using FastAPI, Django, or Flask, capable of handling millions of requests ...

Clera

AI & Backend Engineer

San Francisco, CA · On-site

Python, FastAPI * Frontend: TypeScript, React, Next.js * AI/ML: OpenAI models (GPT-4o, o3, o4-mini, etc.) * Databases: PostgreSQL, Firestore (GCP) * Infrastructure: Docker, Kubernetes, GCP, Microsoft ...

New

Clera

AI & Backend Engineer

San Francisco, CA · On-site

Python, FastAPI * Frontend: TypeScript, React, Next.js * AI/ML: OpenAI models (GPT-4o, o3, o4-mini, etc.) * Databases: PostgreSQL, Firestore (GCP) * Infrastructure: Docker, Kubernetes, GCP, Microsoft ...

New

ClinDCast LLC

Python Backend Engineer

Sunnyvale, CA · On-site

$60 - $65/hr

We are seeking an experienced Python Backend Engineer to design, develop, and maintain scalable ... Build and optimize RESTful APIs using FastAPI, Django, or similar frameworks. Develop and integrate ...

Vkore Solutions

Python Developer-F2F Interview

San Jose, CA · On-site

$59 - $81.25/hr

Python developer the following expertise 1. Expertise in developing production level code utilizing OOPs concepts , 2. Experience in developing FASTAPI services , 3. Expertise in managing code ...

Relanto, Inc.

Snowflake Data Engineer

San Francisco, CA · On-site

$134K - $162K/yr

Snowflake Data Engineer Location: SFO, CA // Dallas, TX (Hybrid) Duration: Long Term Key ... using Python, FastAPI, and Flask (Optional) •   Work with Salesforce Data Cloud (admin ...

Relanto, Inc.

Snowflake Data Engineer

San Francisco, CA · On-site

$134K - $162K/yr

Data Engineer - Snowflake Location: San Francisco, CA or Dallas, TX or RTP, NC/Hybrid - 3 to 4 days ... using Python, FastAPI, and Flask (Optional) •   Work with Salesforce Data Cloud (admin ...

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Python Fastapi Developer information

What is a Python FastAPI developer?

A Python FastAPI Developer is responsible for designing, developing, and maintaining backend applications using FastAPI, a modern web framework for building APIs with Python. They work on creating high-performance APIs, integrating with databases, implementing authentication, and ensuring scalability. This role often involves working with asynchronous programming, cloud services, and containerization tools like Docker. Developers collaborate with teams to create efficient, secure, and well-documented API endpoints for web and mobile applications.

What are the key skills and qualifications needed to thrive in the Python FastAPI developer position, and why are they important?

To thrive as a Python FastAPI Developer, you need strong proficiency in Python programming, experience designing RESTful APIs with FastAPI, and a background in web development concepts. Familiarity with version control systems like Git, containerization tools such as Docker, and knowledge of cloud platforms or SQL/NoSQL databases are commonly required, and certifications in cloud services or Python development can be advantageous. Excellent problem-solving skills, effective communication, and the ability to collaborate in agile teams help developers contribute efficiently to complex projects. These competencies ensure robust, scalable backend solutions and smooth coordination within development teams to meet business goals.

What are some typical daily tasks for a Python FastAPI developer?

A Python FastAPI Developer typically spends their day designing, developing, and maintaining RESTful APIs to support web or mobile applications. This involves writing clean and efficient Python code, collaborating with frontend developers or other backend engineers to integrate new features, and ensuring the application meets performance and security standards. Developers also participate in code reviews, debugging, and continuous integration processes, while regularly communicating with product managers or stakeholders to align on project requirements. Staying up to date with FastAPI enhancements and industry best practices is also a common part of the role.

What are popular job titles related to Python Fastapi Developer jobs in California? For Python Fastapi Developer jobs in California, the most frequently searched job titles are:
What job categories do people searching Python Fastapi Developer jobs in California look for? The top searched job categories for Python Fastapi Developer jobs in California are:
What cities in California are hiring for Python Fastapi Developer jobs? Cities in California with the most Python Fastapi Developer job openings:
Python Fastapi Developer jobs near you
Infographic showing various Python Fastapi Developer job openings in California as of July 2026, with employment types broken down into 84% Full Time, 5% Part Time, 2% Temporary, and 9% Contract. Highlights an 82% Physical, 3% Hybrid, and 15% Remote job distribution.

Senior Full Stack AI Developer

SolGenie

San Jose, CA • On-site

Contractor

Posted 23 days ago

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: US Citizens and Green Card Holders only
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 / GCP
  • Databases: PostgreSQL, pgvector, Redis
  • DevOps: Docker, GitHub Actions

Nice to Have:
  • LlamaIndex
  • LangChain
  • Model Context Protocol (MCP)
  • Vercel AI SDK

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