HFT C++ Core Systems Developer - 5-15 years experience

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