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C++ Developer (Intern)

Geneva Trading · Chicago, IL · $40.00–$45.00 an hour · IT - Core Dev Internship Chicago

Posted Sep 24, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about the hardest bug you have tracked down in C or C++. How did you find it?

What they are checking: Whether they debug patiently with tools and reasoning, especially memory and undefined behavior problems.

Why do you want to write software at a trading firm instead of a big tech company?

What they are checking: Whether they understand and want the speed and feedback of working close to trading.

Tell me about a project where performance mattered. How did you measure it before optimizing?

What they are checking: Whether they measure before changing code instead of guessing at what is slow.

What would you do

You are given a project in the core development team with a vague goal. How do you get started?

What they are checking: Whether they clarify requirements and break down work instead of waiting for exact instructions.

A senior developer reviews your code and asks for big changes. How do you respond?

What they are checking: Whether they take feedback well and learn from it, which is the main point of the internship.

About the work

What happens in memory when you pass a large object to a function by value versus by const reference in C++?

What they are checking: Whether they understand copies and their cost, which matters in latency-sensitive trading code.

Explain move semantics and give an example where it makes a real difference.

What they are checking: Whether they grasp modern C++ well enough to avoid needless allocations and copies.

How would you design a simple order book that supports add, cancel and best bid and offer lookups quickly?

What they are checking: Whether they can pick data structures for speed and explain the tradeoffs out loud.

What is a cache miss, and how can the way you lay out data affect performance?

What they are checking: Whether they think about hardware effects, which separate fast code from merely correct code.

What are the risks of sharing data between threads, and how would you protect it?

What they are checking: Whether they understand race conditions, locks and atomics well enough to write safe concurrent code.

Practice this interview out loud.

Offer builds a real interview for this exact role at Geneva Trading from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

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The full job description

As published by Geneva Trading.

Founded in 1999, Geneva Trading is a premier global principal trading firm with strategically located offices in Chicago, Dublin, and London. Our relentless focus on trading excellence combined with technological innovation has equipped us with a best-in-class proprietary trading platform, enabling us to compete at the highest levels in the global markets. Rooted in a culture of integrity, collaboration, and an unwavering passion for progress, we foster an environment of personal and professional excellence. Our nimble organizational structure and entrepreneurial spirit attract top-tier talent with a passion for innovation, laying the foundation and driving our consistent success in the industry. &nbsp; Intern With Geneva Trading <span data-ccp-props="{"134233117":false,"134233118":false,"134245418":true,"134245529":true,"335559738":0,"335559739":281}">&nbsp; Geneva Trading is looking for ambitious, entrepreneurial students to join our core development team for a C++/software engineering internship next summer.&nbsp;Our internship program is a fast-paced, dynamic 10-week full-time paid position that gives you hands-on experience in the trading industry.&nbsp;Our interns are expected to design solutions to complex problems and work on projects that directly&nbsp;impact&nbsp;the firm.&nbsp;You’ll&nbsp;receive mentorship by industry pros and will&nbsp;participate&nbsp;in corporate training, teambuilding activities, and firmwide summer socials to strengthen your connection with other interns and full-time employees. The summer internship program is a proven path to earn full-time opportunities at Geneva Trading after graduation.&nbsp; &nbsp; As a C++ Developer (Intern) You Will &nbsp; &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"> Develop, test, and deploy software solutions under the guidance and support of senior technologists&nbsp; &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"> Work with large data sets and research innovative techniques to solve complex problems with middle and&nbsp;back office&nbsp;technologists, researchers, analysts, and project managers &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1"> Leverage agentic AI coding tools like&nbsp;Anthropic's&nbsp;Claude Code to navigate the codebase, automate routine tasks (like writing tests and fixing lint errors), and accelerate feature development &nbsp; &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="1" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="4" data-aria-level="1"> Communicate your ideas to a larger audience and incorporate feedback&nbsp;immediately&nbsp;for effective collaboration &nbsp; Required Qualifications &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"> Currently enrolled in a bachelor’s or master’s degree program focused on Computer Science or adjacent field &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"> Graduation dates between April 2024 and August 2026 &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1"> Excellent C++ programming and design skills &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="4" data-aria-level="1"> A strong understanding of foundational computer science concepts including data structures, algorithms, object-oriented programming, etc. &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="5" data-aria-level="1"> Exposure with network programming (TCP/IP) and multi-threaded applications &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="2" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="6" data-aria-level="1"> Possess an intuitive curiosity to learn and implement&nbsp;new ideas, be disciplined in your approach to work, and unafraid to take initiative or ask questions &nbsp; Preferred Qualification &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1"> Knowledge of data pipelines, relational databases, data storage, and Linux &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1"> Prior internship experience in data engineering or software development &nbsp; <li data-leveltext="" data-font="Symbol" data-listid="3" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1"> Familiarity with foundational AI/ML frameworks or experience using terminal-based AI assistants (like Claude Code) to enhance problem-solving and streamline git workflows &nbsp; &nbsp; Compensation: Hourly Range: $40-45/hr The final hourly rate will be dependent on the successful candidate's skills, experience, education, and qualifications.&nbsp; Application expected to close: 11/23/2026&nbsp; We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. &nbsp; We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Apply at Geneva Trading