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Research Engineer

Citadel Securities
🇺🇸MiamiMediorFull-timePosted September 22, 2026

About the Role

As a Research Engineer at Citadel Securities, you will work closely with the best talents in the industry to design and build high-performance and foundational Alpha and AI infrastructure.

  • Design, develop, and deploy high-performance solutions to modernize our Alpha and AI infrastructure.
  • Work with the researchers to define priorities, deliver new functionalities, optimize, and maintain day-to-day productions.
  • Stay at the frontier of open-source engineering/AI solutions and adapt them for internal use.
  • Your work will enable researchers, analysts, and traders to leverage the most advanced AI algorithms efficiently and productively in their day-to-day workflow.

Responsibilities

  • Design, develop, and deploy high-performance solutions to modernize our Alpha and AI infrastructure
  • Work with the researchers to define priorities, deliver new functionalities, optimize, and maintain day-to-day productions
  • Stay at the frontier of open-source engineering/AI solutions and adapt them for internal use

Requirements

  • Strong problem-solving and communication skills
  • Strong development skills in Python and C++
  • Experience with machine learning libraries/frameworks (e.g. PyTorch, HuggingFace)
  • Demonstrated passion for leveraging AI and engineering excellence to make big impact in quantitative finance
  • Experience working across the entire product lifecycle from conceptualization to production
  • Experience building high-performance infrastructure
  • Experience building LLM applications with open-source projects, or other orchestration frameworks
  • Experience with information retrieval systems, semantic search, etc.
  • Experience with classical NLP tools