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Freelance Next Js Developer Jobs in California (NOW HIRING)

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 ...

Software Engineer, eve

San Francisco, CA · On-site +1

$208K - $312K/yr

As the team behind Next.js, v0, and AI SDK, we create products that help builders move from idea to production with speed, security, and exceptional developer experience. Now, software is entering a ...

As the team behind Next.js, v0, and AI SDK, we create products that help builders move from idea to production with speed, security, and exceptional developer experience. Now, software is entering a ...

Product Engineer

San Francisco, CA · On-site

$140K - $200K/yr

Mission: * We're looking for full stack Product Engineers to join our team building AthenaHQ, the ... Next.js App Router, React 19, Motion, Tailwind + Radix primitives * Backend: Node.js, Temporal ...

Full Stack Engineer Location: Bay Area, CA (Hybrid) Responsibilities * Design, develop, and ... Use Next.js capabilities such as server-side rendering, static generation, routing, middleware, and ...

As an Engineer at Ascend, you'll be part of a small but growing team focused on solving complex ... Build intuitive UIs with Next.js to power financial operations * Develop internal tools to ...

React Developer

Sunnyvale, CA · On-site

$122K - $142K/yr

React Developer React Developers Must have works for Walmart already. If you have not, we cannot ... Experience with Next.js , TypeScript, or GraphQL. * Familiarity with testing tools (Jest, React ...

... Engineers to join their team. The role involves owning products, working directly with customers ... Responsibilities : • Ship full-stack product features with Next.js + TypeScript • Design clean ...

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Senior Full Stack AI Developer

SolGenie

San Jose, CA • On-site

Contractor

This job post has expired today. Applications are no longer accepted.


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