System Software Engineer - AI

Delos Data Inc; Montreal (administrative region); Hybrid; CAD 100,000 - 180,000; Full time

Benefits offered by this job

Equity

Benefits

RRSP

Hybrid work model

Job summary

Delos Data Inc. is seeking a System Software Engineer - AI to help build scalable infrastructure for large-scale AI data center workloads.

You will bridge high-level AI frameworks with low-level system software, designing communication and execution primitives for running models across thousands of GPUs. The role demands strong C++ and Python, Linux proficiency, and experience with GPU programming and distributed frameworks.

Qualifications

• Bachelor’s or Master’s degree in Computer Engineering, CS, or related field.
• Experience with C/C++, memory management and concurrency.
• Proficiency in Linux development environment.

Responsibilities

• Collaborate across the stack to influence the design of our foundational AI infrastructure.
• Identify and resolve performance bottlenecks in distributed training and inference workloads through deep-dive analysis of the software-hardware interface.
• Conduct rigorous performance benchmarking and characterization on multi-node clusters.

Skills

C++

Python

Linux

Systems programming

Education

Bachelor's or Master's degree in Computer Engineering, Computer Science, or related field

Tools

CUDA

PyTorch

JAX

DeepSpeed

Job description

System Software Engineer - AI

About us:

We are a stealth-mode startup building foundational technology to address performance, scalability, and resiliency challenges in large-scale AI data center clusters. We are backed by top-tier VC firms and notable angel investors.

The company is led by experienced builders and operators who have founded companies, taken them to scale, and exited successfully. We work with a strong sense of unity and shared responsibility, and we expect trust, integrity, and respect in how we collaborate and make decisions. We hold ourselves accountable to one another and to the quality of the work we deliver.

Headquartered in Silicon Valley, we operate across a mix of remote and on-site locations in the U.S. and Canada. We aim to create an environment where people are treated fairly, supported in their growth, and are empowered to do meaningful work alongside others who take the craft seriously.

We are looking for:

We arelooking for a talented System Software Engineers to help us redefine the infrastructure layer of AI. In this role, you will bridge the gap between high-level AI frameworks and low-level system software. You will be responsible for designing and implementing the communication and execution primitives that allow large-scale AI models to run efficiently across thousands of GPUs. We are looking for "builders" who thrive in the early stages of a product's lifecycle and is passionate about solving the "hard" systems problems of the generative AI era.

Key Responsibilities:

• Collaborate across the stack to influence the design of our foundational technology, ensuring it meets the needs of next-generation AI models.

• Identify and resolve performance bottlenecks in distributed training and inference workloads through deep-dive analysis of the software-hardware interface.

• Conduct rigorous performance benchmarking and characterization on multi-node clusters.

Required Skills and Qualifications:

• Strong proficiency in C++ and Python, with a deep understanding of systems programming fundamentals (memory management, concurrency, OS internals).

• Proficient in a Linux development environment.

Desired Skills:

• Experience with GPU programming (CUDA) and performance optimization for parallel architectures.

• Familiarity with distributed AI frameworks (PyTorch, JAX, or DeepSpeed) and/or inference engines (vLLM, SGLang, Dynamo/TRT-LLM).

• Hands-on experience with large-scale cluster orchestration and telemetry tools.

Education:

• Bachelor's or Master's degree in Computer Engineering, Computer Science, or a related field.

Compensation:

Target base salary for these broad roles is $100,000 - $180,000 CAD per year + meaningful equity + benefits + RRSP. Our salary ranges are determined by role, level, experience, and location. Your recruiter can share more details.

We are an equal opportunity employer. We value a range of perspectives and experiences and make employment decisions based on merit and business needs. We do not discriminate on the basis of legally protected characteristics.

Agency Note:

We do not accept resumes from agencies or search firms. Please do not forward candidate profiles through our careers page, email, LinkedIn messages, or directly to company employees. Any resumes submitted will be deemed the property of the company, and no fees will be paid in the event the candidate is hired.

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