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