Senior Software Engineer - AI Coding Benchmarks

Mindrift; Poland; On-site; PLN 157,021,189 - 209,361,586; Full time

Job summary

Mindrift is building a dataset to evaluate AI coding agents by creating realistic developer environments, crafting tasks, and defining what constitutes a solved state. You will design scenarios, write tests, and iterate on criteria based on QA feedback to ensure robust evaluation.

The role requires 5+ years in software development and a core stack including Python (FastAPI), JavaScript/TypeScript (React), Docker, PostgreSQL, Kafka and Redis, with English proficiency at least B2+.

Qualifications

• 5+ years in software development.
• Experience with Python (FastAPI) and JavaScript/TypeScript (React).
• Experience writing functional and integration tests.
• English proficiency – B2+.

Responsibilities

• Design tasks and evaluation criteria within realistic simulated environments.
• Create challenging tasks and evaluation criteria for AI coding agents.
• Write tests that accept all valid solutions and reject incorrect ones.
• Iterate on tasks/tests based on QA feedback to ensure fairness and robustness.

Skills

5+ years in software development

Python (FastAPI)

JavaScript/TypeScript (React)

Docker

PostgreSQL

Kafka

Redis

Testing (functional and integration)

English proficiency (B2+)

Tools

FastAPI

React

Docker

PostgreSQL

Kafka

Redis

Job description

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

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

• 5+ 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 paid

Effort estimate

Tasks for this project are estimated to take 20 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 $40/hr equivalent, depending on level and pace. Tasks are estimated at ~20 hours each; you set your own schedule.