Senior Full stack Developer | Options | Experienced Hire

<h2>Overview</h2> <p><strong>Susquehanna</strong> is a global trading firm that uses its own capital to trade across virtually all listed financial products, with a strong focus on derivatives. We combine expertise in trading, technology, and quantitative research to execute millions of transactions daily.</p> <p>We’re seeking a <strong>Senior Full-Stack Developer</strong> to build high-performance tools and internal systems for our trading and quant research teams. This hands-on role involves close collaboration with front-office stakeholders to deliver scalable, robust solutions that directly impact trading strategies—an exciting opportunity at the intersection of finance and technology.</p> <p> </p> <p><strong>Responsibilities</strong></p> <p> </p> <p> </p> <ul> <li>Design, develop, and maintain full-stack applications that support trading and research workflows.</li> <li>Build scalable, high-performance systems using modern object-oriented languages (e.g., C#, Java).</li> <li>Develop and integrate with distributed systems and event-driven architectures (e.g., Kafka).</li> <li>Contribute to both backend and frontend development; experience with Angular or similar frameworks is beneficial.</li> <li>Optimise multi-threaded applications for performance and reliability.</li> <li>Collaborate directly with traders, quants, and other stakeholders to gather requirements and deliver tailored solutions.</li> <li>Participate in all stages of the software development lifecycle, from design to deployment and support.</li> <li>Ensure the stability, performance, and maintainability of mission-critical systems.</li> <li>Stay current with emerging technologies and contribute to continuous improvement initiatives.</li> </ul> <p><strong> </strong></p> <p> </p> <h2>What we’re looking for</h2> <ul> <li>6+ years of software development experience with strong OOP skills.</li> <li>Proficient in modern languages (e.g., C#, Java).</li> <li>Solid grasp of distributed systems, messaging (e.g., Kafka), and concurrency.</li> <li>Familiar with container orchestration (e.g., Kubernetes, Docker Swarm).</li> <li>Experience in client-facing/front-office roles, ideally in financial services.</li> <li>Strong analytical, problem-solving, and communication skills.</li> <li>Degree in Computer Science, Engineering, Mathematics, or related field (or equivalent experience).</li> </ul> <p><strong>Nice to have</strong></p> <ul> <li>Experience with UI frameworks (e.g., Angular, WPF).</li> <li>Exposure to Complex Event Processing (CEP).</li> <li>Background in high-performance or low-latency systems.</li> <li>Familiarity with cloud platforms and scalable architectures</li> </ul> <p> </p> <p><em>If you're a recruiting agency and want to partner with us, please reach out to recruiting@sig.com. Any resume or referral submitted in the absence of a signed agreement will not be eligible for an agency fee.</em></p> <p> </p> <p>#LI-JM1</p> <p> </p>