Senior Developer Tools Engineer

Overview Lemurian Labs is reimagining the foundations of computing to make AI accessible to everyone. Our mission is to remove the limits of scale, hardware, and cost that hold back innovation, so the people solving humanity's hardest problems can move faster. We are building a hardware-agnostic platform that makes every system — from a laptop to a supercomputer — feel like one seamless engine. Developers can write once, run anywhere, and get state-of-the-art performance across any chip, any cloud, at any scale. It's a complete rethink of how software and hardware interact — designed for the era beyond Moore's Law. We are looking for bold engineers who want to build the foundation for the next era of AI and change what humanity can achieve in the process. Role As the founding member of our Developer Experience (DevX) team, you will shape how engineers interact with our compiler infrastructure. You will build tools that give developers 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 will 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. What You’ll 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. Why Join Lemurian Labs Work at the intersection of compilers, hardware, and developer experience — a genuinely rare combination. Build tools that developers will rely on every day, with real ownership from day one. Competitive compensation including equity, medical/dental/vision, retirement savings, and wellness benefits. Lemurian Labs is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees, regardless of gender identity, race, ethnicity, sexual orientation, disability status, age, or background. Compensation depends on experience and geographic location and will be narrowed during the interview process. Additional benefits include equity, company bonus opportunities, medical, dental, and vision coverage, a retirement savings plan, and supplemental wellness benefits. #J-18808-Ljbffr Lemurian Labs