2027 Quantitative C++ Developer Intern

About the role

The Role

We are seeking a Quantitative C++ Developer Intern to join our team and contribute to the high-performance systems that power our trading strategies, market data processing and research infrastructure. The role will suit someone with strong competitive programming instincts, solid C++ fundamentals, and genuine curiosity about applying agentic AI tools to real-world quantitative workflows. The internship will be 3-6 months, including the summer.

What You’ll Do

- Develop and optimize low-latency trading systems, market data engines and strategy back testing frameworks.

- Implementing the high-performance data structures and algorithms that underpin core modules.

- Explore and integrate agentic AI and LLM tools to support strategy research, code generation and research workflows.

- Collaborate with quantitative researchers and traders to translate strategy logic into efficient, robust code.

- Write clear technical documentation and help build reusable components and tooling.

What You’ll Bring

- Pursuing a Bachelor's or Master's degree in Computer Science or a related field.

- A strong foundation in C++ (C++17 or later), including the STL, memory management and template programming.

- A solid grasp of data structures and algorithms and the ability to analyze time and space complexity.

- Comfortable working in a Linux development environment.

- Hands-on experience with agentic AI and LLM applications.

Strongly Preferred

- Competitive programming achievements or strong contest rankings — ICPC, CCPC, Codeforces (2000+ or equivalent), USACO, NOI/NOIP or similar.

- Prior experience on quantitative projects such as strategy backtesting, high-frequency trading systems or market data engines.

- Familiarity with multithreading and concurrency, lock-free data structures, or network programming (TCP/UDP, multicast market data).

- Proficiency in Python for rapid prototyping, data analysis and integration with C++ modules.

- A record of open-source contribution.

What We Offer

- One-on-one mentorship from senior quantitative engineers and researchers.

- Exposure to production-grade trading systems and modern AI tooling.

- Competitive compensation and path to a full-time role.

Our Internship

Kick-start your career in finance with the Schonfeld Internship! Over the course of 3-6 action-packed months, you will have the opportunity to build solutions that tackle real-world challenges and leave a lasting impact on the firm. As an intern, you’ll join a close-knit team that is ready to support your growth and accelerate your career. We will pair you with a dedicated manager and a mentor who’ll guide your development over the course of the internship and beyond. Throughout the program, you will have the chance to connect with senior leaders through a series of learning sessions, attend hands-on skills workshops, network at social events and get a behind-the-scenes look at how various functions power the firm. We’ll empower you to bring your ideas to life and make an impact.