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Mindrift is an AI talent marketplace and crowdsourcing platform that connects freelance specialists with project-based AI training and testing opportunities for third-party tech companies.

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Mindrift
Posted 1w ago

Senior Python Engineer - AI Coding Agent Evaluation (Freelance)

Mindrift
Costa Rica
$150/hrRemotePart Time, Contract
Responsibilities
  • building environments
  • designing tasks
  • writing tests
Requirements
  • Requires 8+ years in software development
  • Python with FastAPI
  • JavaScript/TypeScript with React
  • Docker
  • Postgres, Kafka, Redis
  • Functional and integration testing, and B2+ English
Technical tools mentioned
PythonFastAPIJavaScriptTypeScriptReactDockerPostgresKafkaRedis

Job description

Please submit your CV in English and indicate your level of English proficiency.


Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. Participation is project-based, not permanent employment.What this opportunity involves:
We're building a dataset to evaluate AI coding agents - how well a model handles real-world developer tasks.


You'll create challenging tasks and evaluation criteria within realistic simulated environments:

  • Build realistic developer environments - a virtual company with codebase, infrastructure, and context (tickets, docs, conversations) that forms a believable development history
  • Design tasks from intermediate states of these environments - craft the prompt, define what "solved" means, and ensure the task is solvable by an AI agent
  • Write tests that verify agent solutions - accept all valid approaches and reject incorrect ones, neither too strict nor too lenient
  • Iterate on tasks and tests based on QA feedback - review agent solutions, analyze failures, and refine until the evaluation is fair and robust

What this is NOT:

  • Not data labeling
  • Not prompt engineering
  • Not writing code from scratch - the agent writes most of the code; you guide and evaluate

What we look for:

  • 8+ years in software development
  • Core stack: Python (FastAPI), JavaScript/TypeScript (React), Docker, Postgres, Kafka, Redis
  • Experience writing tests (functional, integration)
  • English proficiency - B2+

Why this is hard:
Frontier models are already good at coding. Creating a task that genuinely challenges the best models is non-trivial. You need to deeply understand where models fail and what scenarios reveal the difference between a good and a bad solution. Tasks have many valid solutions - writing tests that accept all correct solutions and reject incorrect ones is harder than it sounds.

How it works
Apply → Pass qualification(s) → Join a project → Complete tasks → Get paidEffort estimate


Tasks for this project are estimated to take 30 hours to complete, depending on complexity. This is an estimate and not a schedule requirement; you choose when and how to work. Tasks must be submitted by the deadline and meet the listed acceptance criteria to be accepted.

Compensation:
Up to $150/hr equivalent, depending on level and pace. Tasks are estimated at ~30 hours each; you set your own schedule.

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