**Summary:** FBOSS team is a software team in the Network Infrastructure group, that empowers network devices we use in our data centers. FBOSS stands for Facebook Open Switching System, and it's a software stack running on the network switches in Meta’s data centers across the world. We work on some of the most critical infrastructure challenges at Meta. Our current focus is building networking switch platforms for our AI clusters that power large language models (LLM) for Generative AI, Recommendation engine, and Metaverse. Our team works on all the stages of network switches, from defining new switch requirements, to hardware/software design, software development, along with supporting the latest cutting edge Layer 1 components such as Transceivers and PHYs, in operations. **Required Skills:** Systems Software Engineer - FBOSS Responsibilities: 1. Design and implement Platform services such as those used for programming, monitoring, and controlling layer 1 components (Transceivers, Optics and PHYs) and the corresponding system components (sensors, fan control, power etc). 2. Design and implement services implementing transceiver access standards such as SFF and CMIS, and PHY abstraction interfaces such as SAI. 3. Own workstreams focussed on hardware bringup, BSP/SDK bringup, Platform services bringup, and lead the cross-functional effort to complete Engineering validation of new switches. 4. Debug complex, system-level, multi-component issues that typically span across multiple layers from Kernel, and user-mode applications. 5. Lead debugging and signal integrity tuning exercises 6. Profile performance problems and drive optimizations that span the entire software stack. 7. Understand software components from multiple partner teams, lead the integration of those components into the unified product code base, and drive their continued development. **Minimum Qualifications:** Minimum Qualifications: 8. Bachelor's degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience. 9. Bachelor's or Master's Degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience. 10. 5+ Years of experience working on systems software in a large-scale C/C++ code base. 11. Experience in hardware bringup using interfaces like I2C, SPI, GPIO etc. 12. Experience in one or more of the following areas: Layer 1 network development, BSP/Board Support Package, Operating Systems, IPC, Linux, Transceivers, PHYs. 13. Experience with Software Development processes including: source control, bug tracking, and design documentation. 14. 5+ Years of experience developing, debugging, and shipping software products on large code bases that span platforms and tools. **Preferred Qualifications:** Preferred Qualifications: 15. Demonstrated specialized experience in two or more of the following areas: Layer 1 - Layer 2 network operations, Monitor Optics, PHY, FPGAs, sensors, fan control, power etc, BSP/Board Support Package, Operating Systems, Kernel, Vendor SDKs, Linux. 16. Demonstrated experience working collaboratively in large cross-functional teams **Public Compensation:** $70.67/hour to $208,000/year + bonus + equity + benefits **Industry:** Internet **Equal Opportunity:** Meta is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law. Meta participates in the E-Verify program in certain locations, as required by law. Please note that Meta may leverage artificial intelligence and machine learning technologies in connection with applications for employment. Meta is committed to providing reasonable accommodations for candidates with disabilities in our recruiting process. If you need any assistance or accommodations due to a disability, please let us know at accommodations-ext@fb.com.