ByteDance

Research Engineer – Agent Systems & AI Coding Environment (Seed Infra Platform)

ByteDance
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12 hours ago
Seattle, WA, USAMid Level
H1B sponsor

Responsibilities

  • Build agent harnesses and execution environments for AI coding and knowledge tasks, including code execution, tool integration, sandboxing, and system interaction.
  • Develop scalable orchestration frameworks for multi-step agent workflows involving planning, tool use, memory, and coordination.
  • Design evaluation and benchmarking systems to measure agent performance across complex, long-horizon tasks.
  • Improve agent performance through prompting, data curation, and post-training in collaboration with model and reinforcement learning teams.
  • Partner with research and product teams to productionize agent systems.

Requirements

  • Bachelor’s degree or above in Computer Science or a related field.
  • Strong programming skills in Python or a similar language and solid system-building experience.
  • Experience with LLM-based systems, pipelines, or tool-integrated workflows.
  • Understanding of system design and scalable infrastructure.
  • Experience building agent harnesses, runtime systems, or AI coding environments.
  • Experience with Docker, Kubernetes or similar orchestration systems, distributed job execution, and containerized or sandboxed code execution environments.
  • Preferred: familiarity with evaluation frameworks, prompting, fine-tuning, reinforcement learning, or large-scale experimentation.
ByteDance

About ByteDance

10,000+ employees

ByteDance is a global incubator of platforms at the cutting edge of commerce, content, entertainment and enterprise services - over 2.5bn people interact with ByteDance products including TikTok. Creation is the core of ByteDance's purpose. Our products are built to help imaginations thrive. This is doubly true of the teams that make our innovations possible. Together, we inspire creativity and enrich life - a mission we aim towards achieving every day. At ByteDance, we create together and grow together. That's how we drive impact - for ourselves, our company, and the users we serve. We are committed to building a safe, healthy and positive online environment for all our users. We have over 110,000 employees based in more than 30 countries globally. Join us.

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