<h1><strong>Core C++ Developer – Crypto High-Frequency Trading</strong></h1><p><strong>Location: New York, in office full time</strong></p><p><strong>About Selini:</strong></p><p>Selini is a global trading firm focused on systematic trading and venture investing - all within the digital assets space.</p><h2><strong>Overview</strong></h2><p>We are seeking an exceptional <strong>Core C++ Developer</strong> to contribute to the development and optimization of our <strong>high-performance trading systems</strong>. This role focuses on building ultra-low-latency infrastructure, optimizing execution speed, and ensuring robust system reliability. The ideal candidate will have deep expertise in <strong>modern C/C++</strong>, systems programming, and high-performance computing.</p><h2><strong>Key Responsibilities</strong></h2><ul><li>Design, develop, and optimize <strong>low-latency, high-performance trading infrastructure</strong> in <strong>modern C/C++ (latest standards)</strong>.</li><li>Implement efficient and scalable <strong>trading algorithms, order execution, and risk management systems</strong>.</li><li>Deep understanding of exchange connectivity standards for <strong>market data and order entry</strong></li><li>Optimize <strong>CPU performance, memory management, and multi-threaded applications</strong>.</li><li>Collaborate with <strong>quant researchers, traders, and infrastructure engineers</strong> to improve system performance.</li><li>Profile, benchmark, and debug real-time systems to minimize latency and maximize throughput.</li><li>Maintain <strong>robust and fault-tolerant</strong> system components for <strong>continuous trading operations</strong>.</li></ul><h2><strong>Required Qualifications</strong></h2><ul><li><strong>Expert-level proficiency in C++</strong>, with a strong grasp of <strong>modern C++ features (C++17/20/23/26)</strong>.</li><li>Extensive experience in <strong>low-latency, high-performance systems programming</strong>.</li><li>Deep understanding of <strong>networking (TCP/UDP), concurrency, and multi-threading</strong>.</li><li>Strong experience in <strong>Linux-based development</strong> and <strong>performance tuning</strong>.</li><li>Experience with <strong>real-time, high-throughput systems</strong> where performance is critical.</li><li>Background in <strong>crypto or traditional finance trading systems</strong></li></ul><h2><strong>Soft Skills & Culture Fit</strong></h2><ul><li>Candidates from <strong>top-tier institutions</strong> or recognized as <strong>domain experts</strong> are preferred.</li><li>Strong analytical skills and ability to work in <strong>high-pressure, real-time environments</strong>.</li><li>Collaborative team player who enjoys solving <strong>complex engineering problems</strong>.</li></ul><p>We’re a close-knit team that values:</p><ul><li>High ownership and initiative</li><li>Curiosity, intellectual honesty, and rapid learning</li><li>Clear, direct communication</li><li>Working together toward shared goals — no ego, no politics</li></ul><h2><strong>Compensation & Benefits:</strong></h2><ul><li>Very competitive compensation, with strong upside based on contribution and performance</li><li>Competitive holiday allowance </li><li>Free daily Deliveroo lunch</li><li>High-spec office and technology</li><li>Team socials</li><li>Global company offsites and development opportunities</li></ul><p> </p>