Tooling Engineer

Summary

Join Modular, a company revolutionizing AI infrastructure, as a MAX Platform Tooling Engineer. You will lead debugging initiatives for Mojo, a high-performance AI development platform. Design and implement powerful debugging tools and interactive programming environments to empower developers. Collaborate with compiler and kernel teams to improve developer productivity. Ensure seamless integration of technologies with the platform and participate in design discussions and code reviews. Engage with the external Modular community and mentor junior engineers. This role offers the opportunity to shape the future of AI and make a real difference.

Requirements

• Typically 7+ years of experience in systems programming, debugging infrastructure, compilers, or related low-level tools
• Hands-on experience with modern debugger internals (like GDB or LLDB) and a strong understanding of the DWARF debugging format
• Familiarity with LLVM, and MLIR particularly in systems or compiler-related contexts
• Excellent programming skills in C++, or other relevant systems programming focused languages
• Strong understanding of computer architecture and operating systems
• A collaborative mindset, intellectual curiosity, and a drive to solve complex technical challenges as part of a high-performing team
• Clear and effective communication skills, both written and verbal
• Strong alignment with Modular’s cultural values and a desire to help build a thoughtful, inclusive engineering culture
• Deep knowledge of OS internals that matter for debugging — including process layout, threading models, and signal handling on Linux and macOS
• A bachelors degree in Computer Science or a related field or equivalent experience

Responsibilities

• Design, build, and maintain key technologies that support the Mojo compiler, such as the REPL, CPU/GPU debuggers, language servers (LSPs), and tracing tools
• Collaborate closely with compiler and kernel teams to create innovative debugging workflows that significantly improve developer productivity
• Ensure seamless integration of these technologies with our compiler and other parts of our platform
• Participate in design discussions and code reviews to uphold high engineering standards
• Engage with the external Modular community and open source community to support high-quality contributions and foster a welcoming, inclusive environment
• Mentor junior engineers and support their growth

Preferred Qualifications

• Experience working with Nvidia (nvgdb) or AMD (rocmgdb) debugging tools
• Prior experience with Mojo, especially with an accepted contribution to the Mojo open source repository
• Background in integrating debuggers like LLDB or GDB into IDEs, especially if you’ve worked with Debug Adapter Protocol (DAP) or LSP workflows
• In-depth understanding of GDB/LLDB features, including remote debugging setups using gdbserver or LLDB’s remote platform support
• Experience with LLVM’s JIT infrastructure (e.g., MCJIT, ORCJIT), particularly in interactive environments like REPLs
• Familiarity with writing or extending compiler grammars or parsers, especially in REPL-friendly languages
• Hands-on experience with GPU or AI kernel development, especially for high-performance compute workloads
• Proficiency in Python, especially if you've worked on Python debuggers , mixed-language debugging (C++/Python), or introspection tools that bridge dynamic and compiled code
• Experience building or extending developer tooling in VSCode, especially through custom extensions

Benefits

• Premier insurance plans
• Up to 5% 401k matching
• Flexible paid time off