Senior C++/C# Engineer - Remote, Low-Latency Market Data

Databento; San Francisco (CA); Remote; USD 140,000 - 210,000; Full time

Job summary

Databento, based in San Francisco, seeks a midlevel to senior IC to join our core engineering team. You will own and maintain the C# client library and contribute to performance-critical C++ components.

You will build high-throughput, low-latency systems for real-time market data, write parsers for market feeds, and push for robust tooling, CI/CD, and reliable uptime. This role suits engineers who love low-level optimization and developer-friendly APIs.

Qualifications

• 5+ years of full-time software engineering experience.
• Strong proficiency in C++ and C#.
• Experience designing APIs with developer-friendly interfaces.
• Familiarity with multithreading, serialization, and network I/O.
• Experience with high-throughput, low-latency systems.
• Knowledge of open source release management and versioning.
• Comfortable in a remote, collaborative environment.
• Interest in financial data or algorithmic trading.

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.

Skills

C++

C#

API design

Multithreading

Performance optimization

Open source practices

Debugger tools

Remote collaboration

Tools

LLDB

GDB

Job description

Databento, based in San Francisco, seeks a midlevel to senior IC to join our core engineering team. You will own and maintain the C# client library and contribute to performance-critical C++ components.

You will build high-throughput, low-latency systems for real-time market data, write parsers for market feeds, and push for robust tooling, CI/CD, and reliable uptime. This role suits engineers who love low-level optimization and developer-friendly APIs.