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PythonMachine LearningAI
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Active9h ago
Research Engineer Intern - Environments, Data and Post-Training
Role overview
Job description
About Mercor Mercor's mission is to organize human intelligence to power the AI economy. We're a leading AI data company, building the layer between human expertise and frontier models. Millions of domain experts on the platform are paid over $4 million per day to train frontier AI models. Mercor's APEX benchmark family measures AI's real-world impact on professional work. Mercor Enterprise brings this same infrastructure to Fortune 500 companies: helping companies capture how their best people actually work, translating that expertise directly back into agents. Mercor is creating a new category of work where expertise powers AI advancement. Achieving this requires an ambitious, fast-paced and deeply committed team. You’ll work alongside researchers, operators, and AI companies at the forefront of shaping the systems that are redefining society. Mercor is a profitable Series C company va
…About this listing
- Source: Mercor's official careers site (via Ashby) · last confirmed on the source 28 Oct 2026
- Posted 27 Oct 2026
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What they are looking for
Skills & requirements
Qualification
Design and run reward-shaping experiments and algorithmic improvements (e.g., GRPO, DAPO) to improve LLM tool-use, agentic behavior, and real-world reasoning; Build and operate LLM evaluation systems, benchmarks, and metrics at scale; Experience in synthetic data generation, LLM evaluations, or RL-style workflows
Department · Research
Hiring company
Mercor
Mercor is organizing human intelligence to power the AI economy. We are powering frontier research, AI benchmarks, and AI agent training at scale for the top AI labs and enterprises.
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