Senior C++ Systems Engineer
Cross-Platform Agent Re-Architecture & System Monitoring
Department
Engineering / Platform Infrastructure
Experience
3-5 Years in C++ Systems Development
Employment Type
Full-Time
Platforms
Linux · macOS · Windows · AIX
Reporting To
Director of Engineering
About the Role
We are looking for a passionate and highly skilled Senior C++ Systems Engineer to join our core engineering team. In this role, you will be responsible for re-architecting and rebuilding our suite of cross-platform monitoring agents — currently written in C++ — to meet the demands of modern, high-performance, and scalable infrastructure environments.
You will work at the intersection of system-level programming, OS internals, and distributed agent design, ensuring our agents deliver reliable, low-overhead monitoring across Linux, macOS, Windows, and AIX platforms. If you live and breathe systems programming and get excited about pushing performance boundaries, this role is for you.
Key Responsibilities
Agent Re-Architecture & Development
- Lead the design and re-architecture of cross-platform C++ monitoring agents from the ground up, ensuring modularity, performance, and maintainability.
- Evaluate existing agent codebases, identify technical debt, and define migration strategies to modern C++ standards (C++17/20).
- Implement clean, testable, and high-performance C++ code following established design patterns and SOLID principles.
- Collaborate with architecture and product teams to define agent feature roadmaps and technical specifications.
Filesystem Monitoring
- Design and implement filesystem monitoring components using platform-native APIs: inotify / fanotify (Linux), FSEvents / kqueue (macOS), ReadDirectoryChangesW (Windows), and AIX-specific equivalents.
- Develop efficient file-change detection with minimal overhead, supporting real-time event streams for file create, modify, delete, rename, and permission change events.
- Handle edge cases such as deep directory watches, high-volume event bursts, and symbolic link traversal across platforms.
Process Monitoring
- Build robust process lifecycle monitoring using /proc (Linux), kinfo_proc / sysctl (macOS), toolhelp/PSAPI (Windows), and AIX process accounting APIs.
- Track process creation, termination, CPU/memory consumption, and inter-process relationships (parent-child trees).
- Implement low-latency event notifications for process state transitions without excessive polling.
Registry Monitoring (Windows)
- Implement Windows Registry change monitoring using RegNotifyChangeKeyValue and related Win32 APIs.
- Design efficient registry watch trees with support for key-level and value-level change detection.
- Ensure reliable event delivery and deduplication under high-frequency registry modification scenarios.
Cross-Platform Engineering
- Write platform-abstracted agent core logic with clean OS-specific back-end implementations using preprocessor guards and abstract interfaces.
- Ensure binary compatibility, packaging, and CI/CD pipeline support across Linux (x86_64, ARM), macOS (Intel + Apple Silicon), Windows (x86_64), and AIX (POWER).
- Author platform-specific build configurations using CMake with cross-compile toolchain support.
Required Qualifications
Core Technical Skills
- 3+ years of professional C++ development experience, with deep expertise in modern C++ (C++11/14/17 required, C++20 preferred).
- Strong grasp of OS internals: memory management, process scheduling, IPC mechanisms, system calls, and kernel interfaces.
- Proven hands-on experience with filesystem monitoring APIs on at least two of the four target platforms.
- Experience developing cross-platform native software that runs on Linux and Windows (macOS and/or AIX exposure is a plus).
- Familiarity with multi-threaded programming, synchronization primitives (mutexes, condition variables, atomics), and lock-free data structures.
- Strong understanding of build systems — CMake preferred; experience with Makefile-based builds on AIX/Linux.
- Proficiency with debugging and profiling tools: GDB, LLDB, WinDbg, Valgrind, perf, strace/dtrace.
Software Engineering Practices
- Solid experience writing unit and integration tests using frameworks such as Google Test, Catch2, or Boost.Test.
- Comfort with Git-based workflows, code review, and CI/CD pipelines (Jenkins, GitHub Actions, or similar).
- Ability to read, understand, and refactor legacy C++ code with minimal documentation.
Preferred Qualifications
- Experience working with AIX OS internals (POWER architecture, SMIT, ODM, AIX process APIs).
- Exposure to eBPF / kernel tracing mechanisms on Linux for lightweight observability.
- Knowledge of endpoint security, EDR, or SIEM agent architectures.
- Experience with agent-based distributed systems and telemetry pipelines.
- Familiarity with Rust or Go as supplementary system programming languages.
- Contributions to open-source system-level projects are a strong plus.
Core Skills Proficiency Matrix
Skill
Proficiency
Level
Modern C++ (C++17/20) ██████████ Expert
Linux Systems Programming ██████████ Expert
Windows Win32 / WDK APIs ████████░░ Advanced
Filesystem Monitoring APIs ██████████ Expert
Process Monitoring ██████████ Expert
Registry Monitoring (Windows) ████████░░ Advanced
macOS BSD/Kernel APIs ██████░░░░ Intermediate
AIX OS APIs ██████░░░░ Intermediate
CMake / Build Systems ████████░░ Advanced
Multi-threading & Concurrency ██████████ Expert
Debugging & Profiling ████████░░ Advanced
Ready to build the future of cross-platform agent technology?
Apply with your resume, GitHub/portfolio links, and a brief note on your most impactful systems project.
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