Software Engineer (C++/C#)

Databento is hiring a software engineer for its core engineering team. The role focuses on maintaining the C# client library and developing high-performance C++ systems for financial market data processing, with emphasis on throughput, low latency, reliability, and developer-friendly integration.

Responsibilities:

• Own and maintain our C# client library, ensuring it is robust, well-tested, and easy for external users to integrate with
• Design, develop, and maintain high-performance server applications in C++
• Write message parsers and feed handlers for direct market data feeds from trading venues
• Optimize existing codebase for high throughput (millions of messages per second, up to 40+ gigabits) and low latency (measured in nanoseconds)
• Implement tools and libraries for petabyte-scale data processing and analysis
• Collaborate with the systems team to implement best practices for build, deployment, CI/CD
• Implement monitoring and improve application uptime
• Ensure smooth feature rollouts and updates

Requirements:

• 5+ years of full-time software engineering experience, preferably at a trading firm, tech company, or high-growth startup
• Strong proficiency in both C++ and C#
• Experience with Java is a plus
• Experience designing APIs with a strong focus on intuitive, developer-friendly interfaces
• Familiarity with open source best practices, including release management, versioning, changelogs, issue triage, and backwards compatibility
• Knowledge of systems programming, algorithms, data structures, multithreading, networked I/O, serialization, CPU architecture, kernel, and compilers
• Experience working with multiprocess environments
• Comfortable with lldb/gdb
• Good communication skills and work ethic for a remote workplace
• An interest in low-level optimization and performance engineering
• An interest in financial data or algorithmic trading