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