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Freelance Mern Stack Developer Jobs in Fairfield, CA

Navigate AI

Fullstack Engineer

San Francisco, CA · On-site

$100 - $130/hr

The Role We're looking for a full stack engineer who thrives at the intersection of product, design ... Have some product management, founder, or freelance experience * Enjoy debating architecture ...

New

Hedra

Senior Video Producer

San Francisco, CA · On-site

The freelance bench gives you extra volume and specialist craft (e.g., motion graphics). You'll ... Work closely with product, engineering, and marketing to build deep knowledge of the product, our ...

Prime Intellect

Head of Marketing

San Francisco, CA · On-site

Own Your Intelligence Prime Intellect is building the open superintelligence stack: the ... Your Role As Head of Marketing & Developer Relations, you'll own how Prime Intellect shows up in ...

Radical Numerics

Marketing Associate

San Francisco, CA · On-site

$70 - $90/hr

We've redesigned the foundation model training stack to turn the world's raw scientific data (e.g ... freelancers (designers, video producers, developers) for work that's better built externally.

Loop AI

Director of Customer Education

San Francisco, CA · Remote

$100K - $125K/yr

Partner with Product and AI Engineering to instrument education itself - what gets watched, where ... Build and run the contractor and agency stack - instructional designers, video producers, freelance ...

Loop AI

Director of Customer Education

San Francisco, CA · On-site

Loop deploys AI agents built by our in-house team of AI engineers, strategists and subject matter ... Build and run the contractor and agency stack - instructional designers, video producers, freelance ...

Loop AI

Director of Customer Education

San Francisco, CA

$100K - $125K/yr

Partner with Product and AI Engineering to instrument education itself - what gets watched, where ... Build and run the contractor and agency stack - instructional designers, video producers, freelance ...

Loop AI

Director of Customer Education

San Francisco, CA · On-site +1

Loop deploys AI agents built by our in-house team of AI engineers, strategists and subject matter ... Build and run the contractor and agency stack - instructional designers, video producers, freelance ...

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Freelance Mern Stack Developer information

See Fairfield, CA salary details

$24

$60

$87

How much do freelance mern stack developer jobs pay per hour?

As of Aug 21, 2026, the average hourly pay for freelance mern stack developer in Fairfield, CA is $60.31, according to ZipRecruiter salary data. Most workers in this role earn between $50.14 and $69.47 per hour, depending on experience, location, and employer.

What is a freelance MERN Stack Developer?

A Freelance MERN Stack Developer is a self-employed software engineer who specializes in building web applications using the MERN stack: MongoDB, Express.js, React.js, and Node.js. These developers work independently, often on a project-by-project basis, for various clients. They handle both the front-end and back-end development, ensuring seamless integration and performance of web applications. Freelance MERN Stack Developers are valued for their flexibility, technical expertise, and ability to deliver end-to-end solutions.

What are the key skills and qualifications needed to thrive as a freelance MERN Stack Developer?

To thrive as a Freelance MERN Stack Developer, you need strong proficiency in MongoDB, Express.js, React.js, and Node.js, along with a solid understanding of JavaScript and web development fundamentals. Familiarity with version control systems like Git, deployment platforms (e.g., AWS, Heroku), and relevant certifications such as JavaScript or React developer certificates are valuable. Excellent communication, time management, and problem-solving skills help freelancers effectively collaborate with clients and manage projects independently. These skills enable successful project delivery, client satisfaction, and adaptability in a competitive freelance environment.

How do freelance MERN Stack Developers typically manage client communications and project expectations?

Freelance MERN Stack Developers often work remotely and independently, making clear client communication essential for project success. They usually conduct regular check-ins via emails, messaging apps, or video calls to discuss progress, clarify requirements, and address feedback. Setting up project milestones and deliverables at the outset helps manage expectations and ensures both parties are aligned on timelines and outcomes. Many freelancers also use project management tools to keep clients updated and track changes efficiently.

What is the difference between Freelance Mern Stack Developer vs Freelance Front-End Developer?

AspectFreelance Mern Stack DeveloperFreelance Front-End Developer
SkillsProficient in MongoDB, Express.js, React, Node.jsSpecializes in HTML, CSS, JavaScript, UI/UX design
Work EnvironmentFull-stack development, backend and frontend tasksPrimarily frontend design and implementation
Common UsageBuilding complete web applicationsCreating user interfaces and visual elements

Freelance Mern Stack Developers handle both backend and frontend development using the MERN stack, enabling them to build complete web applications. In contrast, Freelance Front-End Developers focus mainly on designing and implementing the visual and interactive aspects of websites. While both roles require JavaScript skills, the Mern Stack Developer's expertise spans the entire application stack, making them suitable for full project development, whereas Front-End Developers specialize in user interface design.

What are popular job titles related to Freelance Mern Stack Developer jobs in Fairfield, CA?

For Freelance Mern Stack Developer jobs in Fairfield, CA, the most frequently searched job titles are:

What cities near Fairfield, CA are hiring for Freelance Mern Stack Developer jobs?

Cities near Fairfield, CA with the most Freelance Mern Stack Developer job openings:

Freelance Mern Stack Developer jobs near you
Infographic showing various Freelance Mern Stack Developer job openings in Fairfield, CA as of August 2026, with employment types broken down into 62% Full Time, and 38% Contract. Highlights an 100% In-person job distribution, with an average salary of $125,442 per year, or $60.3 per hour.

Senior Full-Stack Engineer - LLM-Powered Code Review PoC

Fuku

San Francisco, CA • Remote

Full-time

Re-posted 24 days ago

Job description

Job Title: Senior Full-Stack Engineer (Freelance/Contract)
NexaFlow is seeking a Senior Full-Stack Engineer to develop a proof-of-concept code review tool powered by large language models (LLMs).
Key Responsibilities:

  • D
    • esign and implement a prototype tool that leverages LLMs to automatically review pull requests.
  • I
    • ntegrate LLM APIs (OpenAI/Anthropic) to identify bugs, security vulnerabilities, and code style issues in code submissions.
  • P
    • ost contextual feedback directly on pull requests.
  • H
    • andle the entire development process independently, from architecture through deployment.
  • C
    • ollaborate remotely with the NexaFlow team as needed.
    Requirements:
  • 5
    • + years of full-stack development experience.
  • P
    • roficiency in integrating LLM APIs such as OpenAI or Anthropic.
  • E
    • xperience developing code review tools and working with CI/CD pipelines.
  • S
    • trong ability to independently manage end-to-end product development.
  • B
    • ackend expertise in Python or Node.js.
  • F
    • rontend experience with React or Vue.
  • F
    • amiliarity with Docker-based deployment.
    Additional Information:
  • T
    • his is a freelance/contract position, not a full-time employment role.
  • L
    • ocation: San Francisco (remote friendly).

    Fuku logo

    About Fuku

    Sourced by ZipRecruiter

    Industry

    Food services and drinking places

    Company size

    51 - 200 Employees

    Headquarters location

    New York, NY, US

    Year founded

    2015

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