RL Environments Engineer

Confidential

Remote job permanent

Posted: April 2, 2026

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Quick Summary

We are looking for a highly skilled and experienced engineer to join our team in Poland, where we deliver global IT solutions and projects.

Required Skills

PyTorch JAX RL Reward Expertise environment design evaluation Docker git clean code reproducible environments training loops

Job Description

🌍 Hello World!

We are The Codest - International Tech Software Company with tech hubs in Poland delivering global IT solutions and projects. Our core values lie in “Customers and People First” approach that prioritises the needs of our customers and a collaborative environment for our employees, enabling us to deliver exceptional products and services.

Our expertise centers on web development, cloud engineering, DevOps and quality. After many years of developing our own product - Yieldbird, which was honored as a laureate of the prestigious Top25 Deloitte awards, we arrived at our mission: to help tech companies build impactful product and scale their IT teams through boosting IT delivery performance. Through our extensive experience with product development challenges, we have become experts in building digital products and scaling IT teams.

But our journey does not end here - we want to continue our growth. If you’re goal-driven and looking for new opportunities, join our team! What awaits you is an enriching and collaborative environment that fosters your growth at every step.

We are currently looking for: RL Environments Engineer

Our client builds reinforcement learning environments and training tasks for frontier AI labs. The work is technical, research-adjacent, and hands-on. We're not looking for web developers or backend engineers who have used LLM APIs.

💡 Key Responsibilities:

• Design and build MLE/SWE environments and diverse tasks.

• Target a specified language model and satisfy the required difficulty distribution.

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