Software Engineer (Platform Core, C++, C)

• Build and maintain the lean, high-reliability Linux-based operating system that underpins our supercomputer network fabric
• Write (or rewrite) high-performance device drivers to extract the maximum physical capability from our network and compute hardware
• Manage deployment, operation, and debugging of our platform in production, including:
• Rigorous resolution and root-causing of anomalies to ensure the system is constantly improving in reliability
• Developing and constantly improving our tools for observability and configuration management
• Collaborate with our hardware teams and external partners to design the next generation of supercomputer hardware – and then bring up our OS and software stack on it

Benefits

• Health and wellness: Comprehensive health insurance including medical, dental, vision, and disability coverage
• Life and family: Life and AD&D insurance and fertility benefits to ensure our team’s well-being and peace of mind
• Flexible vacation: We work hard but avoid burn out. Take time off when you need it
• Visa sponsorship: We support international talent with visa sponsorship to join our team
• 401(k) plan: Retirement savings plan to secure your financial future- Strong operating systems fundamentals (scheduling, memory management, I/O) — you must be able to articulate in extreme detail how a computer works, from the hardware all the way up to high-level applications
• Understanding of computer networking, both in the host (OS stack) as well as common network devices like switches and routers
• Hands-on systems programming experience in C or C++
• Excellent written and verbal communication skills
• Deep knowledge of the Linux kernel and its networking stack — transferable experience with another production-grade kernel is okay, too!
• Proficiency with debugging tools spanning kernel, network, and userspace (e.g., ftrace, perf, Wireshark/tcpdump, eBPF, gdb, and more)
• Experience bringing up new hardware from scratch — you have flashed bare-metal software on a microcontroller with JTAG, or bootstrapped a Linux kernel and rootfs on new hardware
• Demonstrated track record of developing and optimizing device/peripheral drivers — ideally for high-speed interfaces, or with advanced considerations like DMA and cache coherency
• Experience with product security, OS/system hardening, and secure boot schemes
• Understanding of major peripheral hardware interface standards (Ethernet, PCIe, I2C, SPI, etc.) — you can critically review a schematic, and debug these interfaces if needed