Staff Mojo Compiler Engineer

About Modular At Modular, a Qualcomm company , we’re on a mission to revolutionize AI infrastructure by systematically rebuilding the AI software stack from the ground up. Our team, made up of industry leaders and experts, is building cutting-edge, modular infrastructure that simplifies AI development and deployment. By rethinking the complexities of AI systems, we’re empowering everyone to unlock AI’s full potential and tackle some of the world’s most pressing challenges. If you’re passionate about shaping the future of AI and creating tools that make a real difference in people’s lives, we want you on our team. You can read about our culture and careers to understand how we work and what we value. About the role: This is a technical leadership (IC) role in collaboration with the compiler engineering manager; you will be driving the technical roadmap for the Mojo compiler backend, creating new features, proposing new ideas, driving code reviews and leading design documents. Mentoring other engineers is a key element of this role. Although your primary focus is the compiler backend code generation and lowering across multiple devices and architectures, you will also grow the Mojo tooling capabilities, in particular the debugger. This is where your mentoring and technical leading skills will shine: You will be driving junior engineers working in tooling, training them and helping them grow and lifting the team's overall capability there. LOCATION: Candidates based in the US, Canada, and UK are welcome to apply. You can work in our office in Los Altos, CA, or Edinburgh, or remotely from home. Onboarding for new hires is conducted in-person at the appropriate office. What you will do: Own the technical strategy and architecture for the Mojo compiler backend: IR lowering, optimization passes, and code generation targeting heterogeneous hardware. In Mojo, this spawns from MLIR all the way to LLVM backend or custom compilers. Act as tech lead for a team of backend compiler engineers, breaking down ambiguous problems, driving design reviews, setting technical standards, and multiplying the team's output. Drive performance: use and extend profiling tools to find optimization opportunities, then design the compiler passes that capture them. Lead the team's developer-tooling effort, debuggers (LLDB and the GDB family), profilers, debug-info generation, and data introspection / visualizers — and bring other engineers up to speed as contributors and owners in that space. Steer the editor and language-tooling experience in partnership with the rest of the compiler team, where the boundary between the language server (LSP) and the IDE extension is deliberately blurry. Partner across the Mojo language, MAX, kernel, and hardware-enablement teams, and engage Modular's open-source community. Mentor engineers, raise the technical bar, and influence direction beyond your immediate team. What you bring to the table: Deep,…