
Library Software Engineer - C++
- Lisboa
- Permanente
- Horário completo
- 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.
- 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.
- 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