Toolchain Engineer

o Type: Full-Time

o Comp: Open (in the truest sense of the word — the firm is looking for Subject Matter Experts)

o Location: Philadelphia Metro Area

o Location Requirement: This role is based on site at our Philadelphia area office. We believe in the power of in-person collaboration for building next-generation infrastructure at scale.

o Relocation & Visa: Visa transfer available for the right candidate. Very generous relocation package provided.

o Company: Where Google-Level Engineering Meets Scientific Discovery Meets Financial Precision

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Important for the Role

This is a role for engineers who care deeply about software correctness, reproducibility, and performance. We’re not looking for someone who dabbles in compilers — we want someone who owns the toolchain.

You’re a great fit if:

· You’ve broken a build because you caught the wrong ABI version — and were proud to be the one who did.

· You love toolchains because they are the foundation of everything else.

· You believe no researcher or developer should ever have to debug toolchain issues. That’s your job.

· You’ve worked in environments with hundreds of developers, thousands of builds, and no room for error.

If this sounds like your kind of challenge, read on.

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About the Firm

We operate at the cutting edge of machine learning, scientific computing, and advanced infrastructure engineering. Think Google-scale tooling, NVIDIA-level hardware, and mission-critical financial workloads—all under one roof.

With hundreds of in-house and open-source applications, a Perforce-based monorepo, and active deployments in 150+ datacenters around the world, we are redefining what it means to operate at global scale.

We support a growing base of researchers, engineers, and algorithm developers—and the platform they build on starts with our custom, correct, and high-performance toolchains.

About the Role

As a Toolchain Engineer, you’ll take ownership of the design, build, and deployment of our Linux-based C++ and Python toolchains. These toolchains power over 400 internal and open-source-based applications and are used every day across on-prem and cloud infrastructure around the globe.

You’ll be the engineer who makes sure everything builds, runs, and scales as it should—no surprises, no hidden incompatibilities, and no late-night ABI debugging.

This is a full-time, onsite role at our Philadelphia-area office. Visa transfers and generous relocation packages are available.

Key Focus Areas

· Toolchain Engineering: Build and maintain Linux-based C++ and Python toolchains used globally in high-performance research and production environments.

· Cross-Environment Stability: Ensure builds and applications run reliably across 150+ distributed datacenters and hybrid cloud setups.

· Package & Dependency Management: Manage software stacks using Spack, Conda, and other ecosystem tools to integrate internal code with PyData and open-source C++ libraries.

· ABI Correctness & API Stability: Prevent compatibility issues before they happen. Your work ensures that no one downstream pays the cost of compiler mismatches.

· Build System Automation: Develop systems to validate, test, and distribute toolchains using CI/CD pipelines and reproducible build frameworks.

Responsibilities

· Design and deliver production-grade Linux toolchains for C++ and Python codebases.

· Integrate and manage open source and internal libraries, ensuring they compile and run correctly in highly distributed, performance-sensitive environments.

· Handle dependency resolution, versioning, and patch management across complex, multi-layered build stacks.

· Automate validation, benchmarking, and deployment of toolchains to developers and researchers globally.

· Proactively detect and resolve toolchain issues, from linker problems to hidden ABI drift.

· Serve as a go-to subject matter expert for tooling and build reproducibility in the engineering organization.

Requirements

Must-Have:

· Deep experience building and maintaining Linux toolchains in a production software environment.

· Strong working knowledge of compiler/linker behavior, building flags, binary compatibility, and performance tuning.

· Experience using Spack, Conda, or other build/package systems for managing custom environments.

· Fluency in C++ and Python environments, including open-source ecosystems (Boost, PyData stack, etc.).

· Proven track record supporting large developer organizations (100+ engineers).

· Strong automation mindset — especially around refactoring, reproducible builds, and dependency hygiene.

· Familiarity with cloud-native environments and container-based packaging strategies.

· Hands-on experience with binary distribution, build cache systems, or cross-compilation setups.

· Knowledge of infrastructure at scale, including deployments to high-performance clusters or research supercomputers.

· Contributions to open-source compiler, packaging, or toolchain-related projects.

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What We Offer

· A rare opportunity to work at the intersection of Google-level engineering, scientific computing, and financial precision.

· Impact across thousands of deployments, hundreds of applications, and a truly global engineering footprint.

· Competitive compensation includes:

o Full-time employment with elite salary and performance bonuses

o Visa sponsorship and transfer support

o Extensive relocation assistance for domestic and international hires