Member of Technical Staff — Model Optimization and Inference (New Grad)

Location: In-person in Seattle, Washington, five days a week

Salary: $200,000–$300,000 annual base salary, plus meaningful equity

Company

hirify.global is a research company building photorealistic, real-time AI avatars with emotional intelligence through full-duplex audiovisual systems.

What you will do

• Optimize end-to-end inference across LLMs, audio models, and diffusion-based components.
• Implement KV cache eviction, compression, and memory-efficient attention for long-context conversations.
• Extend inference serving frameworks such as vLLM, SGLang, and TensorRT-LLM for multimodal real-time workloads.
• Profile and benchmark latency and throughput while identifying and eliminating bottlenecks.
• Build profiling viewers, inference test harnesses, and internal optimization infrastructure.
• Apply diffusion acceleration, custom kernels, quantization, and other techniques to improve throughput without materially reducing quality.

Requirements

• Completed or nearly completed BS, MS, or PhD in computer science, machine learning, or a related field.
• Strong fundamentals in LLM inference or ML systems, including KV caching, memory layout, attention kernels, batching, or serving.
• Exposure to vLLM, SGLang, TensorRT-LLM, or similar inference serving frameworks.
• Strong Python and PyTorch skills.
• A systematic approach to profiling and optimization, with a focus on measuring before optimizing.
• Ability to work in person in Seattle five days per week.

Nice to have

• CUDA or Triton experience and kernel optimization work.
• Experience with diffusion inference, speculative decoding, quantization, or model compression.
• Internship, research, publication, or open-source experience in LLM inference, ML systems, or model serving.
• Familiarity with multimodal or streaming inference architectures and hard latency SLAs.

Culture & Benefits

• Research-focused environment working on unsolved real-time AI systems problems.
• Visa sponsorship is available from day one, including O-1, H-1B, and green card sponsorship.
• Health Savings Account plan with approximately $2,000 in annual company contributions.
• 15 days of paid time off, public holidays, and a full week of office closure at year-end.
• Workday meals, drinks, snacks, commuter benefits, and a 401(k).