Software Engineer - Distributed Training

Software Engineer - Distributed Training

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Software Engineer - Distributed Training

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Clockwork.io is a Silicon Valley startup that delivers state-of-the-art AI compute acceleration.
We are founded by Stanford researchers and veteran systems engineers with a shared belief: distributed systems powering modern AI require a new approach to managing time, reliability, and performance. Unlike traditional solutions that rely on specialized hardware or embedded telemetry in switches, Clockwork's system brings insane visibility, resilience, acceleration and efficiency to the network layer entirely through software. As AI workloads continue to scale in size, urgency, and impact, networks must evolve to keep up. Clockwork exists to make that evolution possible.
About Us
Clockwork.io – A Software-Driven Revolution in AI Networking
Clockwork Systems was founded by Stanford researchers and veteran systems engineers who share a vision for redefining the foundations of distributed computing. As AI workloads grow increasingly complex, traditional infrastructure struggles to meet the demands of performance, reliability, and precise coordination. Clockwork is pioneering a software-driven approach to AI networking, delivering deterministic time, ultra-low latency, and seamless scalability for modern distributed systems.
To learn more, visit the Role
We are looking for an experienced software engineer to help build, optimize, and maintain large-scale distributed training infrastructure based on the PyTorch ecosystem. This role focuses on production-grade training workflows involving multi-GPU and multi-node orchestration, high-performance communication layers, and advanced parallelism strategies.
You'll work alongside infrastructure and machine learning teams to ensure training jobs are efficient, scalable, and resilient.
What You will do

• Develop and support distributed PyTorch training jobs using torch.distributed / c10d
• Integrate and maintain frameworks like Megatron-LM, DeepSpeed, and related LLM training stacks
• Diagnose and resolve distributed training issues (e.g., NCCL hangs, OOM, checkpoint corruption)
• Optimize performance across communication, I/O, and memory bottlenecks
• Implement fault tolerance, checkpointing, and recovery mechanisms for long-running jobs
• Write tooling and scripts to streamline training workflows and experiment management
• Collaborate with ML engineers to ensure compatibility with orchestration and container environments (e.g., Slurm, Kubernetes)
  

What We're Looking For

• Deep experience with PyTorch and torch.distributed (c10d)
• Hands-on experience with at least one of: Megatron-LM, DeepSpeed, or FairScale
• Proficiency in Python and Linux shell scripting
• Experience with multi-node GPU clusters using Slurm, Kubernetes, or similar
• Strong understanding of NCCL, collective communication, and GPU topology
• Familiarity with debugging tools and techniques for distributed systems
  

Preferred Skills

• Experience scaling LLM training across 8+ GPUs and multiple nodes
• Knowledge of tensor, pipeline, and data parallelism
• Familiarity with containerized training environments (Docker, Singularity)
• Exposure to HPC environments or cloud GPU infrastructure
• Experience with training workload orchestration tools or custom job launchers
• Comfort with large-scale checkpointing, resume/restart logic, and model I/O
  

Bonus Skills

• Profiling tools: PyTorch Profiler, Nsight, nvprof, or equivalent
• Experience with performance tuning in distributed training environments
• Contributions to ML infrastructure open-source projects
• Familiarity with storage, networking, or RDMA/GPU Direct technologies
• Understanding of observability in ML pipelines (metrics, logs, dashboards)
  

Enjoy

• Challenging projects.
• A friendly and inclusive workplace culture.
• Competitive compensation.
• A great benefits package.
• Catered lunch
  

Clockwork is assembling world class teams to build cutting edge software. We look for bright people from all walks of life and we grow together. All qualified applicants will receive consideration for employment without regard to race, color, ancestry, religion, age, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Software Development

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