Top 368 Javascript web developer Jobs in San Mateo, Ca

Frontend Developer - AI Trainer
DataAnnotation —Milpitas, CA
- $50 - $100 an hour
- Part-time
- Remote
- Writing skills
- English
- Mid-level
- Flexible schedule
Quick Apply
Intermediate/Junior Web Developer
Social Concepts —Redwood, CA
- Email
- Computer science
- Computer Science
- Bachelor of Science
Frontend Developer (React) Junior/Mid
Careerswift —San Francisco, CA
- Full-time
- Remote
- Mid-level
- 3 years
Web Development
Family Reunion —San Francisco, CA
- Email
- Microsoft Outlook
- Windows
- SQL
Software Engineer -- Frontend
Skydera —Palo Alto, CA
- Mid-level
- Office
- Health insurance
- Dental insurance
Web Developer
San Francisco Bay University —Fremont, CA
- $45 - $65 an hour
- Full-time
- Hybrid work
- Mid-level
- University
- Bachelor's degree
Quick Apply
Sr. Application Developer
University of California San Francisco —San Francisco, CA
- Computer science
- Computer Science
- Mid-level
Web Developer
8aNet —Santa Clara, CA
- Email
- Computer Science
- Mid-level
- Master's degree
Sr. Software Engineer - Frontend (Remote)
Allocate —Palo Alto, CA
- $145,000 - $175,000 a year
- Full-time
- Remote
- Computer science
- Computer Science
- 3 years
- Health insurance
- Dental insurance
Frontend Engineer - UI/UX Focus
Zettabyte —Palo Alto, CA
- Full-time
- Hybrid work
- Mid-level
- Office
- US work authorization
Frontend Developer
AIM —San Francisco, CA
- $124,865.64 - $150,375.83 a year
- Full-time
- Azure
- Mid-level
- Office
Quick Apply
Software Engineer - Frontend
Hive —San Francisco, CA
- Full-time
- Computer Science
- Bachelor's degree
- APIs
JavaScript REST API Web Developer / Programmer
DataSelf Corporation —Santa Clara, CA
- Email
- Remote
- Computer science
- Computer Science
- 11+ years
Frontend Engineer
Pump —San Francisco, CA
- $120,000 - $200,000 a year
- Computer Science
- Bachelor of Science
- DevOps
- Health insurance
- Dental insurance
UI React JS Developer
Robotics Technologies —San Leandro, CA
- Mid-level
- US work authorization
- Leadership
Software Engineer III (Frontend)
Tomo Credit —San Francisco, CA
- $120,000 - $200,000 a year
- Full-time
- Computer science
- Computer Science
- Writing skills
- Health insurance
- Dental insurance
Frontend Developer
AVVENIRE SOLUTIONS —Fremont, CA
- Computer Science
- Mid-level
- Bachelor's degree
Software Engineer (Front-end)
Finrise —Burlingame, CA
- Email
- Office
- AWS
- Continuous improvement
Software Engineer 1
Intuit —Mountain View, CA
- $55.50 - $78.00 an hour
- Computer science
- Computer Science
- Mid-level
Frontend Software Engineer
HeyGen —San Francisco, CA
- $180,000 - $240,000 a year
- Mid-level
- HTML
- Health insurance
- Paid time off

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Frontend Developer - AI Trainer

DataAnnotation -
Milpitas, CA

Quick Apply

Job Details

Part-time | Full-time | Contract
$50 - $100 an hour

Benefits

Flexible schedule

Qualifications

English

Full Job Description

DataAnnotation is committed to creating quality AI. Help train AI chatbots while gaining the flexibility of remote work and choosing your own schedule.

We are looking for an existing Frontend Developer - AI Trainer to help train AI models. You'll be part of a growing community of over 100,000 professionals — including front-end, back-end, full-stack, machine learning, and other engineers — who are driving real-world impact in AI development.

Our platform offers an engaging blend of flexibility and challenge: you'll work closely with state-of-the-art AI models to take on programming tasks that include creating and solving challenging coding problems, building beautiful apps with rich functionality, and synthesizing insights through data analysis and visualization. Your work directly contributes to refining intelligent systems that learn, adapt, and evolve. You can fit this work alongside a full-time role, or treat it as your primary focus, choosing projects and schedules that align with your availability and goals.

To get started, once you sign up for an account, you'll take a short assessment (this serves as our version of an interview). If you pass that assessment, you'll receive an email confirmation, and paid work will become available to you through our platform.

Advantages of contracting with us:

Fully remote: work from anywhere in the US, Canada, UK, Ireland, Australia, and New Zealand.
Flexible schedule: choose which projects you take on and when you work, on your own computer, from the comfort of your own home.
Competitive pay: projects are paid hourly, up to $100+ USD per hour. Opportunities for higher bonus rates available for certain projects.
Impact: help shape the future of AI technologies.

Responsibilities:

Design and solve diverse coding problems used to train AI systems.
Write clear, high-quality code snippets and detailed explanations.
Evaluate AI-generated code for accuracy, performance, and clarity.
Provide feedback that directly shapes the next generation of AI models.

Qualifications:

Fluency in English (native or bilingual level).
Proficiency in at least one of the following programming languages or frameworks: JavaScript, TypeScript, Python, C, C#, C++, React, Go, Java, Kotlin, or Swift.
Excellent writing and grammar skills.
A bachelor's degree (completed or in progress).
Previous experience as a Software Developer, Coder, Software Engineer, or Programmer is preferred.

Note: Payment is made via PayPal. We will never ask for any money from you. PayPal will handle any currency conversions from USD. This job is only available to those in the US, Canada, UK, Ireland, Australia, and New Zealand. Those located outside of these countries will not see work or assessments available on our site at this time.

Quick Apply

Refine Your Search

javascript web developer jobs in san mateo, ca

Frontend Developer - AI Trainer

Intermediate/Junior Web Developer

Frontend Developer (React) Junior/Mid

Web Development

Software Engineer -- Frontend

Web Developer

Sr. Application Developer

Web Developer

Sr. Software Engineer - Frontend (Remote)

Frontend Engineer - UI/UX Focus

Frontend Developer

Software Engineer - Frontend

JavaScript REST API Web Developer / Programmer

Frontend Engineer

UI React JS Developer

Software Engineer III (Frontend)

Frontend Developer

Software Engineer (Front-end)

Software Engineer 1

Frontend Software Engineer

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