Research Engineer

Citadel
Miami, US
On-site

Job Description

Role Summary

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. Your work will enable researchers/analysts/traders to leverage the most advanced AI algorithms efficiently and productively in their day-to-day workflow.

Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available.

Objectives

  • 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.

Skills and Preferred Qualifications

  • Strong problem-solving and communication skills
  • Strong development skills in Python and C++
  • Experience with machine learning libraries/frameworks (e.g. PyTorch, HuggingFace) and a demonstrated passion for leveraging AI and engineering excellence to make big impact in quantitative finance.

Bonus Points

  • 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

Skills & Requirements

Technical Skills

PythonC++Machine learning libraries/frameworksPytorchHuggingfaceLlm applicationsInformation retrieval systemsSemantic searchClassical nlp toolsCommunicationQuantitative finance

Soft Skills

Problem-solvingCommunication

Domain Knowledge

Quantitative financeAIMachine learningHigh-performance infrastructureLLM applicationsInformation retrievalSemantic searchClassical NLP tools

Employment Type

FULL TIME

Level

mid

Posted

3/27/2026

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