Software Engineer (Citadel Americas Services LLC Greenwich, CT); Multiple Position Available. Work closely with quantitative teams to formulate & apply various algorithms to solve complex business & technology problems. Full Time. Requires a Bachelor's degree (or foreign equivalent) in Computer Science, Operations Research, Physics or a related quantitative field & 3 years of experience in the job offered or in using data, engineering, & math in support of solving complex problems in the context of daily business operations. Must have 3 years of experience in each of the following: writing code using software & statistical packages such as C#, Python, Numpy, Pandas, Sklearn, or similar; & designing, developing, & testing software solutions for research & business operations. Must also have experience utilizing Commodity Trading Risk Management (CTRM) software technologies. Experience may be gained concurrently.