Principal Data Visualization Engineer (On-site, NYC)

<p><b> Role Overview </b></p><p> We are seeking a senior, hands-on technical leader to play a foundational role in shaping the next generation of data visualization tools for Citadel Securities’ client-facing products. </p><p> This role sits at the intersection of software engineering, data visualization, product design, and human-computer interaction. The ideal candidate will take ownership of building sophisticated client-facing applications and the reusable frameworks that support them. This person must possess strong engineering skills and exceptional visual judgment, with a deep understanding of how design choices can materially elevate the way complex financial information is understood. </p><p> The Principal Engineer will partner closely with product and engineering teams to balance usability, performance, and </p><p> maintainability. The initial focus will be on delivering a small number of distinctive, high-quality client applications, with a mandate to extend this work into a scalable, firm-wide standard. This is a high-ownership opportunity for a builder who combines technical rigor with practical execution to turn complex data into clear, durable systems. </p><p><i><em> 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. </em></i></p><p><b> Responsibilities </b></p><ul><li> Design and build the core visualization platform for client-facing analytics and experiences across the firm. </li><li> Develop reusable visualization frameworks, design systems, and tooling that enable teams to rapidly develop high-quality data products. </li><li> Partner closely with Sales, Business Leaders, Engineering, Product Management, and Design to translate complex business problems into clear technical solutions. </li><li> Evaluate emerging technologies to continually improve the visualization platform. </li><li> Drive innovation in how market, trading, and client data are explored, understood, and communicated. </li><li> Provide technical leadership through hands-on development, design reviews, and mentoring. </li></ul><p><b> Qualifications </b></p><ul><li> Strong technical execution and visual judgment. </li><li> Significant experience contributing to sophisticated data visualization applications, platforms, frameworks, and / or developer tooling. </li><li> Expertise in modern visualization technologies (e.g., D3.js, Observable, WebGL, Three.js, Vega, React, TypeScript, Python). </li><li> Strong visual design instincts and a demonstrated understanding of typography, layout, color, visual hierarchy, interaction design, and information architecture. </li><li> Deep understanding of how users consume and interpret complex information. </li><li> Experience working across engineering, design, and product organizations. </li><li> Strong communication and stakeholder management skills. </li><li> Bachelor's degree or above in Computer Science, Design, Human-Computer Interaction, Cognitive Science, Engineering, or related discipline. </li></ul><p><br /><i><em> In accordance with applicable law, the </em></i><i><b> base salary </b></i><i><em> range for this role is $175,000 to $350,000. </em></i></p><p><i><em> In addition, the employee who fills this role will be eligible to participate in a discretionary incentive compensation program, as well as a wide array of benefit programs, such as medical and life insurance, retirement and tax-free savings plans, and access to other healthcare programs. </em></i></p><p></p>