Senior Developer Tools Engineer

Job Description

At Lemurian Labs, we're on a mission to bring the power of AI to everyone—without leaving a massive environmental footprint. We care deeply about the impact AI has on our society and planet, and we're building a rock-solid foundation for its future, ensuring AI grows sustainably and responsibly. Because let's face it, what good is innovation if it doesn't help the world?

We are building a high-performance, portable compiler that lets developers "build once, deploy anywhere." Yes, anywhere. We're talking about seamless cross-platform compatibility, so you can train your models in the cloud, deploy them to the edge, and everything in between—all while optimizing for resource efficiency and scalability.

If the idea of sustainably scaling AI motivates you and you're excited about making AI development both powerful and accessible, then we'd love to have you. Join us at Lemurian Labs, where you can have fun building the future—without leaving a mess behind.

About the Role

As the founding member of our Developer Experience (DevX) team, you will be instrumental in shaping how engineers interact with our compiler infrastructure. You'll build the tools that give developers deep visibility into system performance—from profiling and debugging capabilities to hardware introspection interfaces. Your work will bridge the gap between our core compiler technology and the engineers who use it, transforming complex system data into actionable insights.

This role sits at the intersection of systems programming and developer tooling. You'll work closely with our compiler engineers to surface server-side telemetry through intuitive client-side interfaces, ultimately creating a best-in-class development experience for our users.

Here is what you will do:

Design and build developer tools for profiling, debugging, and performance introspection across our compiler stack.

Create client-side tooling that transforms server-side compiler telemetry into clear, actionable information for engineers.

Develop interfaces that expose hardware performance metrics, and interrupt data in meaningful ways.

Build GPU debugging capabilities and visualization tools to help engineers understand execution on heterogeneous hardware.

Define formats and protocols for debug information exchange, working with standard debugger formats (DWARF, JTAG) and object file formats (ELF, COFF).

Collaborate with internal engineering teams to understand their needs and iterate on tooling, with a path toward external customer-facing tools.

Essential Skills and Experience:

3+ years of professional experience in systems-level software development.

Strong proficiency in C++ with experience writing performance-critical code.

Working knowledge of assembly language and low-level debugging techniques.

Familiarity with debugger formats (DWARF, JTAG) and object file formats (ELF, COFF).

Understanding of profiling methodologies and performance analysis tools.

Ability to work on-site at our Toronto or Santa Clara office.

Preferred Skills and Experience:

Experience with GPU programming and debugging (CUDA, ROCm, or similar).

Experience with OS-level interfaces including I/O subsystems and interrupt handling.

Background in compiler development or toolchain infrastructure.

Experience building developer-facing tools or IDEs.

Contributions to open-source debugging or profiling tools.

Salary depends on experience and geographical location.

This salary range may be inclusive of several career levels and will be narrowed during the interview process based on a number of factors, such as the candidate's experience, knowledge, skills, and abilities, as well as internal equity among our team.

Additional benefits for this role may include: equity, company bonus opportunities, medical, dental, and vision benefits; retirement savings plan; and supplemental wellness benefits.

Lemurian Labs ensures equal employment opportunity without discrimination or harassment based on race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity or expression, age, disability, national origin, marital or domestic/civil partnership status, genetic information, citizenship status, veteran status, or any other characteristic protected by law.

EOE

Full-time