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Contract Remote Full Stack Java Developer Jobs in Massachusetts

Owl Labs

Senior Full Stack Engineer

Somerville, MA · On-site +1

$120K - $160K/yr

Owl Labs is looking for a Senior Full Stack Engineer to build customer-facing product experiences ... Equity Owl Labs is a hybrid company, we are over 40% remote, and our headquarters is based in ...

Owl Labs

Senior Full Stack Engineer

Cambridge, MA · On-site +1

$120K - $160K/yr

Owl Labs is looking for a Senior Full Stack Engineer to build customer-facing product experiences ... Equity Owl Labs is a hybrid company, we are over 40% remote, and our headquarters is based in ...

ICONSTAFF

Backend Engineer/FullStack

Cambridge, MA · On-site +1

$140K - $220K/yr

Full-Stack Engineer | AI/ML Start-up | Competitive Salary + Equity We're partnering with a fast ... Remote work stipend * Generous PTO Next Steps If you're interested in working on challenging ...

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Infographic showing various Contract Remote Full Stack Java Developer job openings in Massachusetts as of August 2026, with employment types broken down into 89% Full Time, 4% Part Time, 6% Contract, and 1% Nights. Highlights an 87% Physical, 2% Hybrid, and 11% Remote job distribution.

Full Stack Software Developer - AI Trainer

Cambridge, MA • On-site, Remote

DataAnnotation
Computing Infrastructure Providers, Data Processing, Web Hosting • 10K+ employees
Learn more about DataAnnotationexternal

$50 - $100/hr

Contractor

Posted 11 days ago

Job description

About the job:

Contribute to developing cutting-edge AI systems, while enjoying the flexibility of remote work and setting your own schedule.

We are looking for an existing Coder (this is an opportunity to work with us as an independent contractor) to help advance AI development. As a DataAnnotation’s coder, 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.

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:

  • You'll be able to choose which projects you want to work on and when
  • You work on your own schedule, on your own computer, from the comfort of your own home
  • Projects are paid hourly starting at $50-$100+/hr, with bonus rates available on some projects

Responsibilities:

  • Give AI chatbots coding challenges and evaluate their outputs
  • Evaluate the quality produced by AI models for correctness and performance

Qualifications:

  • Fluency in English (native or bilingual level)
  • Detail-oriented
  • Experience with algorithms, data structures, and debugging workflows
  • A current, in progress, or completed Bachelor's is preferred but not required

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. This is an independent contractor position.

#coder

Working at DataAnnotation

Perks for workers

  • Work From Anywhere

  • Set Your Own Hours

  • Competitive Pay

  • Learn Valuable AI Skills

  • No Meetings. No Commute.

  • Work on Your Schedule

  • Make a Real-World Impact

What to expect from working at DataAnnotation

From DataAnnotation

Apply