Compiler Engineer — LLVM Backend

DensityAI; Mountain View (CA); On-site; USD 180,000 - 320,000; Full time

Benefits offered by this job

Equity grant

Medical/Dental/Vision

401(k)

Standard PTO

Job summary

DensityAI in Mountain View, California is hiring an LLVM Backend Developer responsible for developing and optimizing the LLVM backend for their custom accelerator ISA. This role requires strong expertise in compiler engineering and computer architecture, along with debugging abilities.

The ideal candidate will have 5+ years of experience working with LLVM and will work alongside chip-design teams to drive the AI accelerator program from the ground up. Compensation ranges from $180,000 to $320,000 based on experience.

Qualifications

• 5+ years of compiler engineering experience with LLVM.
• Strong understanding of computer architecture and ISA design.
• Ability to debug correctness and performance regressions.

Responsibilities

• Own LLVM backend development for custom accelerator ISA.
• Develop AI-assisted tool flows to enhance compiler performance.

Skills

LLVM backend internals

Compiler engineering

Computer architecture

ISA design

Debugging performance regressions

Custom-ISA bring-up

Job description

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 you'll do

• Own LLVM backend development for our custom accelerator ISA — instruction selection, register allocation, scheduling, and linker support across scalar, vector, and floating‑point pipelines.
• Use and develop AI‑assisted tool flows to accelerate compiler development and performance tuning.

What we'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.

Compensation

Final offers depend on level, location, and skills relevant to the role. Additional compensation: equity grant per company guidelines; medical / dental / vision; 401(k); standard PTO.

Visa Sponsorship

DensityAI sponsors qualified candidates for H‑1B, O‑1, TN, E‑3, and other employment‑based visas, and we welcome applicants on F‑1 OPT and STEM‑OPT. Work authorization is required at start; we provide immigration support to secure or transfer status.

Equal Opportunity

DensityAI is an Equal Opportunity Employer. We do not discriminate on the basis of race, color, religious creed, national origin, ancestry, physical or mental disability, medical condition, genetic information, marital status, sex, gender, gender identity, gender expression, age (40+), sexual orientation, military or veteran status, pregnancy, or any other status protected by law. We comply with the California CROWN Act and provide reasonable accommodations on request.

Full compensation packages are based on candidate experience and relevant certifications.

California pay range

$180,000 - $320,000 USD