Meridial (Invisible)Coding & software eval
Java Coding Specialist - Freelance AI Trainer Project
$45/hr
About this role, in Meridial (Invisible)'s words
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.
A closer look
More context, when you need it.
Full job descriptionThe original posting, in Meridial (Invisible)'s words
Posted by Meridial (Invisible), reproduced here so you can judge the role before clicking. Original posting ↗
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
Working with Meridial (Invisible)Pay, getting started and work, from Meridial (Invisible)'s own pages
What the platform publishes in general. These are not extra terms confirmed for this particular role.
- Getting paid
- Earnings are processed every two weeks. Meridial says all time on projects is paid, with no platform cut. meridial.ai/faq, meridial.ai/become-an-expert
- Before your first paid task
- A profile, a brief confirmation step, then a signed Statement of Work once you are matched. Its postings say the exact rate is set after it evaluates your experience, expertise and location. meridial.ai/faq, job-boards.greenhouse.io/agency/jobs/4784908101
- How much work
- No guarantee of immediate work: Meridial reaches out when a project needs your domain, and your profile stays active until then. meridial.ai/faq
- Contract
- Independent contractor, not an employee of Meridial or Invisible Technologies. meridial.ai/faq
Read on the pages linked above on 23 Sep 2026. Platforms change these terms, so check the linked page before you rely on one.
How does the pay compare?Across Coding & software eval roles, not this role alone
From our own daily reads of every open listing on the platforms we follow, not from Meridial (Invisible)'s posting. How we count.
Pay across the field: Coding & software eval
Across 393 roles in this field with a stated hourly rate in US dollars, on 14 platforms, the middle half pays $65 to $120 an hour at the top of the range, and the median is $95. This role's top rate, $45, is in the bottom quarter. Of the 140 distinct rates we count, 11 are lower and 125 are higher.
| Platform | Roles | Top of range, per hour |
|---|---|---|
| Alignerr | 137 | $50 to $400 · median $100 |
| micro1 | 46 | $35 to $350 · median $110 |
| Handshake AI | 43 | $47 to $125 · median $80 |
| Mercor | 33 | $60 to $200 · median $105 |
| Meridial (Invisible) (this platform) | 33 | $22 to $150 · median $60 |
Sources and listing historyWhere this information comes from
This listing's history
- First seen here on 19 Aug 2026, and still on Meridial (Invisible)'s list when we last read it on 13 Oct 2026.
- Posted by Meridial (Invisible)
- First seen by AIPayList
- Last seen live
- Listing ID
- 4840254101
Pay as the source states it: “pay of $45 per hour”.
Platforms sometimes change a rate after posting. Every listing here is re-read at least once a day and corrected when its source moves, so a difference you see on the platform is usually a change made since the last read. How freshness works.
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