Software Engineer - GPU Kernels

Baseten; Toronto; On-site; CAD 251,000 - 503,000; Full time

Benefits offered by this job

Equity

US health insurance

Flexible PTO

Parental leave

Fertility stipend

401(k) US

Job summary

Baseten is seeking a GPU Kernel Engineer to design and optimize high-performance GPU kernels for AI workloads. You will work on low-level optimization, leveraging CUDA C++ and tensor cores to accelerate core ML operations, with exposure to state-of-the-art inference systems.

The role offers growth potential in a fast-paced environment, collaborating with research teams to productionize advances and contribute to open-source GPU libraries.

Qualifications

• Strong knowledge of GPU architecture and programming paradigms.
• Proficient in C++ and GPU performance profiling tools.
• Familiarity with CUDA C++ API and memory/bandwidth optimization.

Responsibilities

• Design and implement high-performance GPU kernels for key ML operations, including matrix multiplications and attention.
• Write and optimize CUDA/assembly code using architecture-specific techniques.
• Apply optimization methods like memory coalescing, warp-level programming, and tensor core acceleration.

Skills

GPU architecture

C++ proficiency

Profiling

Tools

CUDA C++ API

Nsight Systems

Nsight Compute

Torch Profiler

Tensor cores

Job description

About Baseten

Baseten powers mission-critical inference for the world's most dynamic AI companies, like Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma, and Writer. By uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting‑edge models into production. We're growing quickly and recently raised our $1.5B Series F, led by Altimeter Capital, Conviction Partners, and Spark Capital. Join us and help build the platform engineers turn to ship AI products.

THE ROLE

We’re seeking a GPU Kernel Engineer to join our team at the cutting edge of AI acceleration, where your code directly impacts the performance of state‑of‑the‑art machine learning models. As a GPU Kernel Engineer, you'll craft the foundation that powers modern AI workloads, optimizing every microsecond of computation to enable breakthrough applications.

You’ll work in a fast‑paced, intellectually stimulating environment where technical excellence is paramount and your contributions directly influence production systems serving millions of users across numerous products. This role offers exceptional growth potential for engineers passionate about low‑level optimization and high‑impact systems work.

EXAMPLE INITIATIVES

You’ll get to work on these types of projects as part of our Model Performance team:

• Baseten Embeddings Inference: The fastest embeddings solution available
• The Baseten Inference Stack
• Driving model performance optimization

Responsibilities

Core Engineering Responsibilities

• Design and implement high-performance GPU kernels for key ML operations, including matrix multiplications, attention mechanisms, and mixture-of-experts routing
• Write and optimize code using CUDA, PTX assembly, and architecture‑specific techniques
• Apply advanced performance optimization methods such as memory coalescing, warp‑level programming, tensor core acceleration, and compute/memory overlap

Performance & Innovation

• Implement cutting‑edge features like quantization (FP8/FP4), sparsity, and compute/communication overlap
• Identify and resolve performance bottlenecks using tools like Nsight Systems, Nsight Compute, and Torch Profiler
• Collaborate with research teams to productionize theoretical advancements

Impact & Collaboration

• Contribute to internal and open‑source GPU libraries
• Present technical contributions at industry conferences (e.g., NVIDIA GTC, AWS re:Invent)

Requirements

• Strong understanding of GPU architecture and programming paradigms:
• Memory hierarchy (global, shared, registers, L1/L2 cache)
• Thread/block/grid organization
• Synchronization techniques and race condition mitigation
• Proficient in C++ and GPU performance profiling tools
• Knowledge of:
• CUDA C++ API
• Memory access patterns and bandwidth optimization
• Numerical precision and quantization strategies
• Modern GPU features (e.g., tensor cores, async operations)

NICE TO HAVE

• Experience with Transformer models and attention optimization (e.g., Flash Attention)
• Familiarity with GPU kernel libraries: Cutlass, Triton, Thrust, CUB
• Background in GEMM tuning and distributed/multi‑GPU compute
• Contributions to open‑source GPU projects
• Research publications or conference presentations on GPU performance

Benefits

• Competitive compensation, including meaningful equity
• (U.S. only) 100% coverage of medical, dental, and vision insurance for employee and dependents
• Flexible PTO policy including company wide Winter Break (our offices are closed from Christmas Eve to New Year's Day!)
• Paid parental leave
• Fertility and family-building stipend through Carrot
• (U.S. only) Company-facilitated 401(k)
• Exposure to a variety of ML startups, offering unparalleled learning and networking opportunities.

At Baseten, we are committed to fostering a diverse and inclusive workplace. We provide equal employment opportunities to all employees and applicants without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status.

We are an Equal Opportunity Employer and will consider qualified applicants with criminal histories in a manner consistent with applicable law (by example, the requirements of the San Francisco Fair Chance Ordinance, where applicable).

Compensation Range: $180K - $360K