Inworld

Staff / Principal Machine Learning Engineer, Serving - USA

Inworld
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6 months ago
Mountain View, CA, USAStaff+
H1B sponsor

Base Salary

$270k - $500k/yr

Responsibilities

  • Own the full cycle of machine learning model serving from research handoff to reliable production operation.
  • Optimize inference latency and throughput using model acceleration and serving techniques.
  • Profile and tune high-performance systems running on NVIDIA GPUs.
  • Design and operate distributed, multi-GPU and multi-node inference systems.
  • Build scaling, load-balancing, and reliability solutions for thousands of concurrent connections.
  • Containerize models and ensure their serving infrastructure is stable in production.
  • Develop benchmarks and prototypes to clarify ambiguous performance and architecture problems.
  • Contribute visible technical work and, where appropriate, open-source contributions.

Requirements

  • Deep understanding of modern serving frameworks and inference optimization techniques such as vLLM or TRT-LLM.
  • Hands-on experience with quantization, distillation, caching strategies, continuous batching, paged attention, and speculative decoding.
  • Proficiency in C++, CUDA, Rust, or highly optimized Python, including profiling and optimizing NVIDIA GPU workloads.
  • Experience with Kubernetes, Ray, custom load balancing, multi-GPU or multi-node inference, and handling thousands of concurrent connections.
  • Public work such as substantial systems programming projects, major inference-engine open-source contributions, or deep-dive technical writing is useful.
  • Ability to take a model from research through containerization, serving optimization, and reliable production deployment.
  • PhD in computer science, physics, or mathematics, or equivalent practical experience building backend or machine learning systems.
  • Ability to work independently in ambiguous environments and prioritize shipped, stable, high-impact engineering.
  • Strong interest in understanding and improving core latency, throughput, architecture, and reliability challenges.

Benefits

  • Relocation assistance is offered.
  • The role is based in the Mountain View office with in-person collaboration.
  • Equity and benefits are included.
Inworld

About Inworld

51-200 employees

Inworld builds real-time voice AI and agent infrastructure for developers, including text-to-speech, speech-to-speech, speech recognition, and LLM routing delivered via APIs and SDKs. Customers use it to create interactive characters and agentic experiences in games, apps, and virtual worlds; revenue comes from usage-based and enterprise licensing. Founded in 2021 and headquartered in Mountain View, California, the company is privately held and works with game studios and large technology firms.

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