Build Systems Engineer (Bazel)

Job description

What MatX Is Building MatX builds custom AI accelerator silicon. The build system is the backbone: it wires together RTL, a stack of commercial EDA tools (simulation, synthesis, place-and-route, lint/CDC), and a Rust/Python software stack into one hermetic, reproducible pipeline. We run on Bazel with bzlmod, RBE, custom rules, and a small but tight set of platform-level abstractions. You'll join a small group that owns the build graph, the toolchains, the rules that wrap each EDA tool, and the CI infrastructure that keeps thousands of targets green. What You’ll Do Here: - New EDA tool integrations. Wrap a closed-source tool in a hermetic Bazel rule with proper providers, runfiles, and execution constraints. Add a new front-end stage to an existing toolchain; add a rule for test variants that share configuration; wire a third-party generator into our verilog graph as a first-class dep - Bazel version migrations. Lead upgrades (8.x → 9.x) and the bzlmod/MODULE.bazel housekeeping that comes with them - Hermeticity work. Hunt down the implicit assumptions: system Python, system gcc, leaked /usr/bin deps, host-state in tests. Replace them with hermetic toolchains and tracked inputs - Re...