Software Engineer, Inference

Luma; Greater London; On-site; GBP 110,000 - 170,000; Full time

Job summary

Luma is building large-scale inference systems and needs a systems engineer to own model serving within the inference engine. You will scale deployments across thousands of machines, optimize GPU utilization, and ensure reliability across clusters and hardware providers.

Ideal candidates have strong Python and system-architecture skills, experience with Linux, Docker, Kubernetes, and model deployment frameworks such as PyTorch, Hugging Face, vLLM, or TensorRT-LLM. Equal opportunity employer.

Qualifications

• Experience building scalable inference systems.
• Experience deploying models with PyTorch, Hugging Face, vLLM, SGLang or similar.
• Strong Linux, Docker, and Kubernetes experience.
• Familiarity with distributed scheduling and fleet management at scale.
• Proficient Python and systems background.

Responsibilities

• Own how Luma’s models get served and integrate architectures into the inference engine.
• Scale deployments across thousands of machines and manage workloads across clusters and hardware providers.
• Build internal tooling to measure, profile, and track the lifetime of inference jobs and workflows.
• Automate, test, and maintain inference services for uptime and reliability.
• Build scheduling systems that optimize GPU resources while meeting SLOs and maintain CI/CD for model checkpoints.
• Collaborate with research, engineering, and infrastructure to improve efficiency.

Skills

Python

System Architecture

Model deployment

Linux

Docker & Kubernetes

Redis & S3 storage

Tools

PyTorch

Hugging Face

vLLM

SGLang

TensorRT-LLM

Job description

You’ll own how Luma’s models get served - integrating new architectures into the inference engine, scaling deployments across thousands of machines, and keeping expensive GPU fleets busy while meeting internal SLOs.

This is large-scale inference systems work: scheduling, fleet management, deployment pipelines, and reliability across clusters and hardware providers. It fits a strong systems engineer comfortable with model serving and Kubernetes at scale. If you want pure modeling rather than the systems that run models, this is firmly the systems side.

What You’ll Own

• Ship new model architectures by integrating them into the inference engine.

• Collaborate across research, engineering, and infrastructure to optimize model efficiency and deployments.

• Build internal tooling to measure, profile, and track the lifetime of inference jobs and workflows.

• Automate, test, and maintain inference services for maximum uptime and reliability.

• Manage and optimize inference workloads across clusters and hardware providers, and scale deployments across thousands of machines.

• Build scheduling systems that use expensive GPU resources optimally while meeting SLOs, and maintain CI/CD for model checkpoints and SDKs.

First 90 Days

One way the first 90 could unfold.

• Days 1-30 - Immerse & Diagnose: Learn the inference stack, the fleets, and where reliability or utilization break.

• Days 30-60 - Ship & Validate: Integrate a model or ship tooling/scheduling that improves uptime or GPU utilization.

• Days 60-90 - Scale & Systemize: Harden deployment pipelines and scheduling across clusters and providers.

What You Bring

• Strong Python and system-architecture skills.

• Experience deploying models with PyTorch, Hugging Face, vLLM, SGLang, TensorRT-LLM, or similar.

• Experience with queues, scheduling, traffic control, and fleet management at scale.

• Experience with Linux, Docker, and Kubernetes, and with orchestration, deployment, and scheduling.

• Familiarity with Redis and S3-compatible storage.

Nice to Have

• Modern networking stacks including RDMA (RoCE, InfiniBand, NVLink).

• High-performance large-scale ML systems (100+ GPUs).

• CUDA, and FFmpeg or multimedia processing.

About Luma: Luma’s mission is to build unified general intelligence that can generate, understand, and operate in the physical world. We believe multimodality is critical for intelligence - the next step beyond language models comes from vision. Luma is an equal opportunity employer.