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

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

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