Remote Mainframe Code Reviewer (COBOL)

AI Trainer Jobs; United States; Remote; USD 148,000 - 210,000; Full time

Benefits offered by this job

Remote work

Contractor role

Hourly pay after interview

Job summary

AI Trainer Jobs is seeking a Junior Mainframe Developer (COBOL) for a remote contractor role focused on evaluating production code, debugging traces, and AI outputs for correctness. You will reproduce failures, write minimal unit tests, and explain fixes so the modeling team can target gaps.

The role offers remote work with US eligibility, paid at $130/hr after the interview. Candidates should show strong code-reading, debugging, and testing skills across frameworks such as pytest, Jest, JUnit,

Qualifications

• Experience in evaluating production code and debugging traces.
• Ability to write minimal failing tests and explain fixes.
• Strong reasoning and documentation for code review tasks.

Responsibilities

• Run and reproduce candidate code outputs in a sandboxed environment.
• Grade engineering review solutions for correctness, style, and edge cases.
• Write the smallest failing test that demonstrates a bug.
• Compare paired solutions and provide a rationale tied to rubric.

Skills

Code review

Debugging

Unit testing

Software engineering

Review writing

Tools

pytest

Jest

JUnit

Go test

RSpec

Job description

AI Trainer Jobs is seeking a Junior Mainframe Developer (COBOL) for a remote contractor role focused on evaluating production code, debugging traces, and AI outputs for correctness. You will reproduce failures, write minimal unit tests, and explain fixes so the modeling team can target gaps.

The role offers remote work with US eligibility, paid at $130/hr after the interview. Candidates should show strong code-reading, debugging, and testing skills across frameworks such as pytest, Jest, JUnit,