Senior Software Engineer Together Cloud Infrastructure

Join Together AI, a company focused on building the AI Acceleration Cloud, an end-to-end platform for the full generative AI lifecycle. As a Senior AI Infrastructure Engineer, you will play a key role in building a highly available, global cloud infrastructure that virtualizes cutting-edge ML hardware and enables state-of-the-art ML practitioners with self-serve AI cloud services. You will design, build, and maintain backend services, work on a global high-performance object store, and perform architecture and research work for decentralized AI workloads.

• Design, build, and maintain performant, secure, and highly-available backend services/operators that run in data centers and automate hardware management.
• Work on a global multi-exabyte high-performance object store, serving massive datasets for pretraining.
• Perform architecture and research work for decentralized AI workloads and work on the core, open-source Together AI platform.
• Demonstrated experience with building and operating high-performance and/or globally distributed micro-service architectures across one or more cloud providers (AWS, Azure, GCP)
• 5+ years experience writing high-performance, well-tested, production quality code
• Deep experience with Kubernetes internals a big plus, such as implementing non-trivial Kubernetes operators, device/storage/network plugins, custom schedulers, or patches thereon or Kubernetes itself
• 5+ years of professional software development experience and proficiency in at least one backend programming language (Golang desired)
• Experience with infrastructure automation tools (Terraform, Ansible), monitoring/observability stacks (Prometheus, Grafana), and CI/CD pipelines (GitHub Actions, ArgoCD)
• Strong systems knowledge across compute, networking, and storage, including concurrency, memory management, performant I/O, and scale
• Experience building IaaS or PaaS systems at scale a plus
• GPU programming, NCCL, CUDA knowledge a plus
• Experience with DPUs/SmartNICs a plus
• Excellent communication skills – able to write clear design docs and work effectively with both technical and non-technical team members
• Experience virtualizing GPUs and/or Infiniband a big plus
• Experience working on high-performance compute, networking, and/or storage a big plus
• Deep experience with DC networking tech + solutions a big plus, such as VLAN, VXLAN, VPN, VPC, OVS/OVN
• Experience with Cluster API or similar a big plus
• Deep experience with VMs/hypervisors a big plus, such as QEMU/KVM, cloud-hypervisor, VFIO, virtio, PCIE passthrough, Kubevirt, SR-IOV