We’re looking for an ML Engineer focused on training optimization to help us scale and improve large-scale model training. You’ll work at the intersection of research and production, optimizing training pipelines for speed, stability, and cost—while collaborating closely with researchers pushing model architecture and capability forward.
This is a high-impact role with real ownership: your work directly affects how fast we can iterate, how large we can scale, and how efficiently we deploy new models.
What You’ll DoOptimize large-scale model training pipelines (throughput, convergence, stability, and cost)
Improve distributed training strategies (data, model, and pipeline parallelism)
Tune optimizers, schedulers, batch sizing, and precision (bf16 / fp16 / fp8)
Reduce training time and compute cost via profiling, bottleneck analysis, and systems-level improvements
Collaborate with researchers on architecture-aware training strategies
Build and maintain robust training infrastructure (checkpointing, fault tolerance, reproducibility)
Evaluate and integrate new training techniques (e.g. gradient checkpointing, ZeRO, FSDP, custom kernels)
Own training performance metrics and continuously push them forward
Strong experience training large neural networks (LLMs or similarly large models)
Hands-on experience with training optimization (not just model usage)
Solid understanding of:
Backpropagation, optimization algorithms, and training dynamics
Distributed systems for ML training
Experience with PyTorch (required)
Comfort working close to hardware (GPUs, memory, networking constraints)
Ability to move fluidly between research ideas and production-ready code
Experience with large-scale distributed training (multi-node, multi-GPU)
Familiarity with DeepSpeed, FSDP, Megatron, or custom training stacks
Experience optimizing training on AMD or NVIDIA GPUs
Contributions to open-source ML infrastructure or research codebases
Exposure to non-Transformer architectures (RNNs, hybrid models, etc.)
Real ownership at Series-A stage — your work shapes the company’s trajectory
Work on cutting-edge models and training systems at scale
Small, highly technical team with fast feedback loops
Strong emphasis on engineering quality and research rigor
Competitive compensation + meaningful equity
Skills Required
- Strong experience training large neural networks
- Hands-on experience with training optimization
- Solid understanding of backpropagation and optimization algorithms
- Solid understanding of distributed systems for ML training
- Experience with PyTorch
- Comfort working close to hardware
What We Do
We enable serverless inference via our GPU orchestration and model load-balancing system. We unlock fine-tuning by enabling organizations to size their server fleet to throughput needs, not number of models in the catalogue. See it in action on our public cloud, which offers inference for 10k+ open weight models.
