Senior Software Engineer, AI Infrastructure

ByteDance • Seattle, WA

85d

About The Position

The Cross-Platform team at ByteDance is responsible for developing a high-performance rendering engine and a versatile application framework used across a wide range of products. These systems enable efficient, consistent, and high-quality UI development at scale. We are expanding our mission to improve developer experience and efficiency by building intelligent development tools. These tools will assist engineers working on complex cross-platform systems-streamlining workflows, surfacing insights, and reducing development friction through the integration of AI and automation. We are seeking an experienced AI Developer to join our team in building the next generation of internal development tools. Your work will focus on integrating AI and machine learning into our toolchain to accelerate software development, improve code quality, and simplify engineering workflows.

Responsibilities

• Design and implement AI-powered developer infrastructure that enhances productivity, reduces friction, and improves code quality.
• Build and refine intelligent systems for knowledge management, including vector databases, retrieval-augmented generation (RAG) pipelines, BM25-based retrieval, and named entity recognition.
• Develop and integrate coding agent tools (similar to Codex-, Claude-, or Gemini-style assistants) to support tasks such as code generation, diagnostics, refactoring, and performance tuning.
• Create and maintain evaluation frameworks and benchmarks (e.g., custom test suites like SWE-bench variants) to rigorously assess AI systems on real-world coding tasks.
• Collaborate with engineers across frameworks and rendering domains to understand pain points and translate them into practical, AI-enhanced solutions.
• Maintain infrastructure for model integration including code analysis, in-editor assistance, and workflow automation.
• Track emerging trends in AI-assisted development and propose new tools and features that push the boundaries of developer experience.

What This Job Offers

• Industry: Publishing Industries
• Number of Employees: 5,001-10,000 employees