Modeling Architect (AI)

Location: On-site in Austin, Texas, or Sunnyvale, California, United States

Salary: $170,000–$200,000 per year, plus equity

Company

hirify.global is an AI hardware startup developing silicon photonics and programmable metasurface technology for energy-efficient, high-performance AI inference.

What you will do

• Model the architecture and system performance of the T100 optical inference accelerator.
• Bring up dense, Mixture of Experts, hybrid/SSM transformer, retrieval, speech, vision, and recommendation workloads.
• Bind Hugging Face and PyTorch workloads to the programming model and execute them on functional models.
• Co-design tiling, scheduling, the ISA, SRAM and HBM hierarchies, and multi-chip mappings.
• Build Python, C++, cycle-approximate, power, functional, and RTL simulation models for compute, memory, and hardware/software interfaces.
• Document tests, configurations, assumptions, plots, and results, and collaborate with architecture, compiler, runtime, and RTL teams.

Requirements

• BS or MS in Computer Engineering, Electrical Engineering, Computer Science, or a related field.
• 3+ years of experience in hardware modeling, performance simulation, computer architecture, or related work.
• Proficiency in Python or modern C++17 or later.
• Working knowledge of pipelines, caches, memory hierarchies, microarchitecture, and ISA design.
• Ability to convert LLM, GEMM, or accelerator research into workload configurations using Hugging Face or PyTorch.
• Strong debugging skills and disciplined documentation of experiments and assumptions.

Nice to have

• Experience with roofline or limiter analysis, GPU benchmarking, or model correlation.
• Experience with event-driven, cycle-approximate, or cycle-accurate simulation using SystemC, gem5, SST, or custom kernels.
• Experience with SystemVerilog, Verilog, Verilator, or RTL co-simulation.
• Experience with HBM, DRAM, cache, SRAM, NoC, AXI, or DMA.
• Familiarity with CUDA, GPU programming, or PyTorch internals.

Culture & Benefits

• Collaborative work with experienced engineers across architecture, compiler, runtime, and RTL disciplines.
• Health plan premiums covered for employees and dependents, with HSA contributions.
• Unlimited paid time off.
• 401(k) matching and stock option opportunities.
• Dental, vision, life, hospital, critical illness, and accident insurance options.