CCL(Collective Communication Library) Lead Engineer

Responsibilities and Opportunities

• Architecting and implementing a new collective communication library from scratch, specifically engineered for our NPU’s unique architecture and topology
• Defining the technical vision, API, and performance targets for the communication library
• Driving the hardware-software co-design process to influence future NPU and interconnect architecture

Key Qualifications

• Master’s degree in Computer Science, Computer Engineering, or a related field
• Minimum of 10 years of professional experience in high-performance systems software development
• Strong collaboration and problem-solving skills for complex technical issues
• Expert-level understanding of collective communication algorithms (e.g., All-Reduce, All-Gather, Reduce-Scatter) and their performance characteristics
• Full-stack knowledge, from CPU/accelerator architecture and OS internals to the packet level of networking fabrics like RDMA/RoCE
• Deep understanding of high-radix interconnect topologies and Network-on-Chip (NoC) architectures.
• Proven experience leading significant software projects with a track record of delivering complex, high-performance, and reliable software

Ideal Qualifications

• A Ph.D. in a related field (HPC, Parallel Computing, Computer Architecture)
• Prior experience building a high-performance communication library (e.g., NCCL, MPI) or parallel runtime from the ground up
• Experience with performance analysis and optimization for AI accelerators (GPUs, TPUs, or other NPUs) and their specific interconnects (e.g., NVLink, CXL, RoCE)

Application Process

• Document screening - Online interview (including coding test) - Culture-fit interview - On-site interview - Compensation negotiation - Final acceptance
• The selection process may vary by job and may change depending on the schedule and circumstances.
• The selection schedule and results will be individually notified via the email address you provided when applying.

Notes

• This announcement may close early if recruitment is completed.
• If there are false facts in the application, admission may be canceled.
• Employment may be restricted if the legal qualifications required for recruitment and job performance are not met.
• Being a veteran or a person with a disability does not negatively affect the hiring process.
• The scope of duties may change considering the candidate's overall career and experience. If such a change is necessary, it will be communicated with the candidate at an appropriate time before the final offer of employment.
• For inquiries related to recruitment, please contact the email address below.
• recruit@rebellions.ai