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Software Engineer Intern

New York

About IEX

IEX is an exchange operator and technology company dedicated to innovating for performance in capital markets. Founded in 2012, IEX launched a new kind of securities exchange in 2016 that combines a transparent business model and unique architecture designed to protect investors. Today, IEX applies its proprietary technology and experience to drive performance across asset classes, serve investors, and advocate for transparent and competitive markets.

About the role

IEX is seeking a Software Engineer Intern to join our Software Engineering team. In this role, you will work alongside experienced engineers to design, build, and optimize systems that power our exchange and new product offerings. You will gain exposure to high-performance, low-latency systems and contribute to projects that directly impact how markets operate.

This internship offers the opportunity to develop your technical skills while learning about market structure, electronic trading, and the unique challenges of real-time systems at scale.

About You:

  • Self-starter – takes responsibility for learning and contributing, even on smaller projects.
  • Analytical and creative – not afraid to deep dive on technical challenges.
  • Critical thinking and problem-solving – approaches complex tasks methodically, identifying root causes and developing practical, effective solutions.
  • Inquisitive – asks questions and independently researches applicable solutions.

What You’ll Do:

  • Collaborate with technology and operations teams to design and implement solutions that support the exchange’s trading systems.
  • Contribute to the development and maintenance of C++ and Java-based frameworks, messaging APIs, and data structures that power critical exchange functions.
  • Assist in the software development lifecycle, including building, testing, deploying, and managing application dependencies.
  • Work on systems such as order entry, market data distribution, post-trade processing, and system monitoring and reporting.

Your Background:

  • Pursuing a Bachelor’s degree in Computer Science, Computer Engineering, or a related field.
  • Fundamental understanding of computer science – algorithms, data structures, and systems concepts (i.e., memory, CPU, networking).
  • Proficiency in at least one systems-oriented or analytics language (i.e., C++, Python, or Java)
  • Ability to reason performance and scalability for optimized production systems.
  • Familiarity with LLM assisted coding tools (i.e., Codex, Cursor, Claude Codes).
  • Experience with data modeling, statistics, or machine learning is a plus.

Our job titles may span more than one career level. The starting annual base pay is $45.00 / hour for this NY-based position. The actual base pay is dependent upon many factors, such as: training, transferable skills, work experience, business needs and market demands. The annual base pay range is subject to change and may be modified in the future. This role is eligible for bonus and equity.

Here at IEX, we are dedicated to an inclusive workplace and culture. We are an Equal Opportunity Employer that does not discriminate on the basis of actual or perceived race, color, creed, religion, alienage or national origin, ancestry, citizenship status, age, disability or handicap, sex, marital status, veteran status, sexual orientation, genetic information or any other characteristic protected by applicable federal, state or local laws. This policy not only complies with all applicable laws and protects workers' rights but is vital to IEX’s overall mission and values. 

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