Est. expiry Oct 15

Java Coding Specialist - Freelance AI Trainer Project

Java Developer

Posted Sep 10 (34 days ago) · Last seen Oct 14 · Open 34 days. This role usually stays open about 24 days

Key facts

At a glance

Freelance Java specialist evaluating AI-generated solutions; $45/hour after Java assessments.

How this salary compares

€6,310Benchmarked against senior roles

Too few postings state a salary to show this.

Monthly salary comparison for Java Developer
MarketLower bound (25th percentile)MedianUpper bound (75th percentile)
senior roles€5,833 per month€6,667 per month€8,333 per month
This offer€7,920 per month€7,920 per month€7,920 per month
Where and how
World Wide - RemoteRemoteFreelance, Senior
Languages required
English
Education
Bachelor
Managing people
No People Management

Original job ad

As published by Invisible Agency

Open the ad
Java Coding Specialist - Freelance AI Trainer Project United States of America Are you a Java expert who can spot a flawed abstraction from across a codebase? Large-scale language models are evolving from clever chatbots into engines of real scientific and engineering progress. High-quality training data is what separates a capable model from a genuinely useful one. That data starts with people who actually know the craft. We're looking for Java specialists with deep fluency in object-oriented design, concurrency, JVM internals, data structures, algorithms, and system architecture. You'll put advanced language models through their paces on Java problems spanning a wide range of difficulty and complexity, assessing whether model-generated solutions are correct, well-reasoned, and production-quality. That means evaluating not just whether code runs, but whether it's the right approach, whether edge cases are handled, and whether the reasoning behind it holds up. You'll review Java problems and model-generated solutions, judge correctness and code quality, identify where the model's logic breaks down, and document failure patterns clearly enough that others can act on them. You may also flag whether a given problem is well-specified and appropriately challenging for training purposes. A bachelor's, master's, or PhD in computer science, software engineering, or a closely related field is a strong signal. So is real-world Java experience, competitive programming, open-source contributions, or technical writing. The ability to clearly articulate why a solution is wrong or weak, not just that it is, matters as much as the technical depth. Ready to put your Java expertise to work shaping the next generation of AI? Apply today. We offer a pay of $45 per hour for candidates who successfully pass our preliminary Java-focused assessments. As a contractor, you'll supply your own secure computer and high-speed internet. Company-sponsored benefits such as health insurance and PTO do not apply. Project Type: Freelance / Contract Workplace type: Remote

The text above is the employer's original job description, extracted as written. Other details on this page, like salary, responsibilities, and requirements, are interpreted from that text by our system, not values the employer explicitly confirmed, so treat them as our best interpretation rather than verified facts.

About the role

Summarised by JobCrawls from the job ad above.

Requirements

  • Deep knowledge of object-oriented design, concurrency, JVM internals, data structures, algorithms, and system architecture
  • Ability to explain clearly why a solution is wrong or weak
  • A degree in computer science, software engineering, or a closely related field is a strong signal
  • Relevant background may include real-world Java experience, competitive programming, open-source contributions, or technical writing
  • Must pass preliminary Java-focused assessments
  • Provide your own secure computer and high-speed internet

Responsibilities

  • Review Java problems and model-generated solutions
  • Assess correctness, reasoning, and production-quality code
  • Identify flaws in model logic and document failure patterns
  • Evaluate whether problems are well specified and appropriately challenging for training

Skills & Technologies

JavaJavaObject-oriented DesignConcurrencyJVM InternalsData StructuresAlgorithmsSystem ArchitectureCode ReviewCompetitive Programming

Recruitment Process

  1. Pass preliminary Java-focused assessments

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About Invisible Agency

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Invisible Agency · 2 open roles
Top locations (all time): Finland · 2
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LocationActive listings
Finland2
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Role typeActive listings
Finnish Language Specialist1
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Current role-level mix at Invisible Agency on JobCrawls
Role levelActive listings
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