Fullstack Developer jobs in United States

Job Description

Location: Remote (Worldwide - see accepted locations below)

Contract Type: Long-term Contract

Hours: Flexible, 15-40+ hours per week

🚀 Immediate Opportunity - Tool Use Sprint Starting This Week!

We have a major project launching THIS WEEK with opportunities for 1000+ developers. This initial Tool Use sprint will run for 10 days, focusing on training AI models to use tools and APIs effectively. Success on this project will open doors to additional tool use projects in our pipeline. We need to onboard as many developers as possible in the next 7-10 days!

We accept applicants from multiple countries worldwide. For the complete list of accepted locations, click here. This work is 100% remote. No new location restrictions apply.

You’ll join an expert annotation team to create training data for the world’s most advanced AI models. No previous AI experience is necessary. You’ll get your foot in the door with one of the most prominent players in the AI / LLM space today. We seek developers with professional coding experience to train large AI language models, helping cutting‑edge generative AI models write better code and use tools effectively. Projects typically include discrete, highly variable problems that involve engaging with these models as they learn. We currently have 1000+ roles open for an immediate project start!

• Auditing AI model’s tool usage and API interactions
• Reading, writing, and editing JSON files
• Working with APIs - building, using, and integrating them
• Solving coding problems in your preferred programming language
• Writing test cases to confirm code works efficiently
• Creating instructions to help train AI models

We have everything from "Which piece of code is better?" to "Help the AI use this API correctly" to "Build a complete application and improve the AI’s responses." The variety keeps the work engaging and interesting.

Expectations are 15+ hours per week; however, there is no upper limit. We have developers working 20-40 hours per week and some working 40+ hours per week. You can work as much as you want to. You’ll get paid weekly per hour of work done on the platform.

Long term, there is no end date. They expect to have work for the next 2 years.

You can end the contract at any time. We hope you will commit to 12 months of work, but if you start and it’s not a fit for you, we totally understand.

Developers can set their own hours—ideal candidates will be interested in spending 40 hours a week. They will be with teams, so strong performers will adapt to the urgency of projects and stay engaged, but they will also be incredibly flexible on working hours.

You can take a 3-hour lunch, no problem. Instead of tracking your hours, you are paid according to time spent on the platform, calculated in the coding exercises.

Apply using this Ashby form

• Resume screening to assess your coding ability
• If you seem like a good fit, we’ll send an async code review that will take 35 minutes and must be finished within 72 hours
• Complete programming assessments in your strongest languages (only list your most skilled languages)

Standard onboarding: Sign‑In → Platform Onboarding → Project Specific Onboarding

You’ll perform a simulated production‑level task on the platform

• Strong attention to detail and instruction‑following ability
• Experience with APIs and JSON
• STEM background with solid coding experience

Ability to audit and improve technical implementations

While Python experience is valuable, we’re equally interested in developers proficient in JavaScript, Java, C++, Ruby, Go, or any other language.

• Professional coding experience (through work, significant projects, or education)
• Complete fluency in the English language
• Strong attention to detail and instruction‑following ability (critical for success)
• Experience working with APIs - building, using, or integrating
• Ability to read, write, and edit JSON files
• STEM background with coding experience
• Problem‑solving skills and analytical thinking
• Pass fraud and background validation

• Professional coding experience in software development / programming role
• Bachelor’s or Master’s degree in Computer Science or any STEM field
• Experience with multiple programming languages
• Familiarity with building and using APIs
• Technical writing or documentation experience
• Proven track record of working independently
• Contributions to coding communities or open source projects
• Enthusiasm for teaching and training AI systems

Your ability to contribute successfully will be primarily driven by your attention to detail and instruction following. The core qualifications are relatively broad - if you can audit a model’s tool usage and work with JSON files and APIs, you’re a great fit!

Ready to start this week? Apply now to secure your spot in this Tool Use Sprint!