Library Software Engineer - C++

• Develop and maintain high-performance C++ libraries that integrate with reverse proxies to enable observability and diagnostics
• Design and implement runtime instrumentation for latency-sensitive and multi-threaded systems
• Contribute to our adoption and integration of OpenTelemetry standards across Datadog's C++ observability libraries
• Own the performance, safety, and correctness of systems-level code running in production
• Collaborate with open-source maintainers and engineering teams to improve tooling and ecosystem support
• Investigate deep infrastructure bugs across boundaries (C++, proxies, OS, network stack)
• Contribute to shaping our telemetry standards and cross-platform instrumentation strategies

Do you have experience in TCP/IP?, * You've written performant, production-grade C++ (C++14 or later) in complex systems

• You're confident with multithreading, memory management, and debugging low-level concurrency bugs
• You're comfortable owning critical paths in systems that need to be fast, observable, and safe under load
• You communicate clearly and thrive in remote, distributed, or async-first teams

Bonus points:

• You've worked on or contributed to open-source reverse proxy projects
• You've built or maintained developer-facing libraries or SDKs
• You have experience working on infrastructure components such as proxies, load balancers, or gateway layers
• You're familiar with system-level observability tools (perf, eBPF, systemtap, etc.)
• You've debugged performance bottlenecks in HTTP, TLS, or TCP/IP stacks
• You have exposure to distributed systems and service meshes at scale

• New hire stock equity (RSUs) and employee stock purchase plan (ESPP)
• Continuous professional development, product training, and career pathing
• Intradepartmental mentor and buddy program for in-house networking
• An inclusive company culture, ability to join our Community Guilds (Datadog employee resource groups)
• Access to Inclusion Talks, our Internal panel discussions
• Free, global mental health benefits for employees and dependents age 6+
• Competitive global benefits

Benefits and Growth listed above may vary based on the country of your employment and the nature of your employment with Datadog.