Software Engineer – C++ (Fully Remote)

Applications are now closed for this role, but we’re always looking for great talent. Check our careers page for similar openings

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-critical systems.

• Expert-level proficiency in modern C++ (C++17 or newer), including templates, memory management, and concurrency.

• Strong understanding of systems programming concepts (CPU architecture, networking, threading, I/O, etc.).

• Experience with Linux systems development, including debugging and performance tuning tools.

• Demonstrated ability to write clean, efficient, and maintainable code in production environments.

• Strong problem-solving skills and attention to detail.

• Comfortable working independently in a fast-paced, fully remote team environment.

Preferred Qualifications

• Prior experience in high-frequency trading, low-latency systems, or real-time financial infrastructure.

• Experience implementing market data handlers, matching engines, or order gateways.

• Familiarity with exchange protocols (FIX, WebSocket, REST) and crypto-native APIs.

• Background in mathematics, physics, computer science, or a related technical field.

• Experience with performance benchmarking and micro-optimization at the hardware level (e.g., cache-aware design, CPU pinning, instruction pipelining).

What We Offer

• Fully remote role – work from anywhere with a reliable internet connection.

• High-impact engineering – direct influence on production trading and strategy performance.

• Flat team structure – rapid decision-making, no bureaucracy.

• Access to cutting-edge infrastructure – hardware, datasets, and profiling tools.

• Competitive compensation – including base salary and performance-based bonuses.

• Engineering autonomy – full ownership of systems and architectural direction.

How to Apply

If you're passionate about building performance-critical systems in C++ and want to work on real-time infrastructure that drives live trading strategies, we encourage you to apply.

Please submit your CV, and optionally include links to code samples, open-source contributions, or a portfolio of relevant work.