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AI Engineer, RL & Evals

Raydar • United State
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Build reinforcement learning environments and evaluation frameworks for creative domains. Design grading rubrics and agent harnesses to improve model output quality. Requires 2-7 years of experience in RL, backend engineering, and Python/PyTorch.

Key Highlights
Build and scale RL environments and evaluation frameworks for creative, non-verifiable domains.
Combine backend/full-stack product engineering with applied ML and own systems from design through delivery.
Collaborate with internal research teams and frontier labs to improve model output quality.
Key Responsibilities
Build and scale RL environments and evaluation frameworks for creative, non-verifiable domains.
Design tasks and grading rubrics that capture design quality and taste.
Build agent harnesses, context layers and supporting product infrastructure.
Collaborate with internal research teams and frontier labs to improve model output quality.
Ship production code end to end and build reliable backend systems and data pipelines.
Technical Skills Required
Python PyTorch Reinforcement Learning
Benefits & Perks
$175,000-$275,000 annual base salary
Competitive equity
Visa transfers supported
Nice to Have
Experience at creative technology, generative AI, crawling, indexing or data companies.
Building agentic frameworks or evaluations for non-verifiable domains.
Experience connecting research work to practical products and infrastructure.

Job Description

About the company

Our client is a seed-stage AI company building the data and infrastructure layer that improves model quality in subjective, creative domains, starting with design. It has raised $18.5M and has revenue-generating partnerships with frontier AI labs and application-layer companies. Its products support post-training, reinforcement learning, context and verification.

The role

As AI Engineer, RL & Evals, you will build reinforcement learning environments, evaluation frameworks and production infrastructure for creative domains. You will combine backend or full-stack product engineering with applied ML and own systems from design through delivery.

What you'll do

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