Senior Software Engineer (Build Systems)

TL;DR

Senior Software Engineer (Build Systems): Designing and building scalable, hermetic build infrastructure for a large monorepo with an accent on remote build execution, content-addressable storage, and dependency management. Focus on optimizing build times, ensuring hermeticity and reproducibility across multiple languages and accelerator platforms.

Location: Hybrid, in San Francisco, CA or New York City, NY. Expectation to be in office at least 25% of the time. Visa sponsorship is available.

Salary: $320,000–$485,000 USD

Company

hirify.global is a public benefit corporation focused on creating reliable, interpretable, and steerable AI systems.

What you will do

• Design and build scalable, hermetic build infrastructure including remote build execution (RBE) and content-addressable storage (CAS).
• Own and evolve Nix-based build environments and package management, keeping nixpkgs and language runtimes current.
• Drive fine-grained dependency management across the monorepo to enable incremental builds.
• Build and maintain language-specific build toolchains and accelerator SDK/runtime builds.
• Reduce container image build times through architectural improvements to build pipelines.
• Partner with CI, Languages, and Developer Acceleration teams to ensure seamless integration.

Requirements

• 6+ years of relevant industry experience building and operating large-scale build systems and infrastructure.
• Deep experience with hermetic, reproducible build systems (Bazel, Buck, Nix, or similar) in a large monorepo environment.
• Strong understanding of build caching strategies, remote execution, and content-addressable storage.
• Experience with containerized build environments and image build pipelines.
• Strong proficiency in at least one of Python, Rust, or Go.
• Excellent communication skills and enjoyment in supporting internal partners.
• At least a Bachelor's degree in a related field or equivalent experience.
• Ability to work in San Francisco, CA or New York City, NY offices at least 25% of the time.

Nice to have

• Experience with Nix/NixOS and managing large Nix package sets at scale.
• Experience with Rust build toolchains (cargo, maturin) and Python-Rust interop.
• Experience building or operating remote build execution systems (Bazel Remote Execution API, BuildBarn, BuildBuddy, or similar).
• Experience managing accelerator SDK builds (CUDA, Neuron SDK, JAX/XLA).
• Experience with fine-grained dependency graph analysis and incremental build optimization at monorepo scale.

Culture & Benefits

• Work as a single cohesive team on a few large-scale research efforts with a focus on impact.
• Highly collaborative group with frequent research discussions.
• Competitive compensation and benefits, optional equity donation matching.
• Generous vacation and parental leave, flexible working hours.
• Lovely office spaces in San Francisco and New York City.