# Compiler Engineer-LLVM Backend at Density

- Company: Density
- What the company does: Density shows you how people use your space and helps you get more out of every square foot. Backed by Kleiner Perkins and South Park Commons.
- Company website: https://www.density.io/
- Type: Startups (AI role)
- Level: Mid level
- Location: Mountain View, CA
- Work setup: On-site
- Posted: 2026-06-02
- Apply by: 2026-10-08
- Apply: https://job-boards.greenhouse.io/densityai/jobs/4264631009
- Page: https://www.1752.vc/careers/jobs/density-compiler-engineer-llvm-backend/

## About the role

Own LLVM backend development for our custom accelerator ISA — instruction selection, register allocation, scheduling, and linker support across scalar, vector, and floating-point pipelines. Work with chip-design and software teams driving DensityAI's AI accelerator program from first silicon through scale-out.

## What they're looking for

- Exceptional abilities in LLVM backend internals (TableGen, instruction selection, scheduling, register allocation)
- 5+ years of compiler engineering experience, with hands-on LLVM target development
- Strong understanding of computer architecture, ISA design, and compiler-hardware co-design
- Ability to debug correctness and performance regressions across the full compilation flow
- (Optional) Custom-ISA bring-up, MLIR experience, GPU / accelerator backends, or linker / loader work

Tags: Software