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About OctoHorizon OctoHorizon is an independent high-frequency trading (HFT) firm focused on developing advanced algorithmic strategies for digital asset markets. Our approach combines rigorous quantitative research with low-latency engineering to identify and capture short-lived market inefficiencies. We are a globally distributed, fully remote team built on principles of autonomy, technical excellence, and continuous iteration. Engineers at OctoHorizon work at the intersection of performance, infrastructure, and algorithmic trading — with direct and measurable impact on production systems and trading results. Role Overview We are seeking an exceptional C++ Software Engineer to design and implement high-performance systems that underpin our trading infrastructure. In this role, you will be responsible for building and optimizing real-time systems that handle market data, order execution, and strategy deployment with minimal latency and maximum reliability. This is a hands-on engineering role with end-to-end ownership of critical components in a live trading environment. The ideal candidate has deep expertise in modern C++ and a strong understanding of system-level performance. Responsibilities Design, develop, and maintain high-performance, low-latency trading systems in C++. Implement core infrastructure for market data ingestion, order routing, risk checks, and strategy execution. Profile, benchmark, and optimize code to meet stringent latency and throughput requirements. Collaborate with quantitative researchers and infrastructure engineers to support deployment of real-time strategies. Build robust, fault-tolerant systems capable of operating reliably under varying market conditions. Maintain clean, well-tested code and contribute to architectural decisions across the stack. Take full ownership of components from design through production support. Minimum Qualifications 3+ years of professional software engineering experience, with a focus on performance-crit