Performance Engineer

The Core Product: SourceFS

SourceFS is a high-performance virtual filesystem designed to turn multi-hour workflows into minutes.

10x Faster Builds: Intelligent caching and virtualization that only materializes files when they are actually needed.

10x Lower Costs: Enabling a standard 16-vCPU machine to outperform even a 128-vCPU machine.

True Engineering Productivity: Replaying hundreds of thousands of build steps instantly when inputs match.

The Cultural Anchor: Own It

We operate with a high degree of trust and a shared value of End-to-End Ownership :

"We own our work end-to-end, from spark to finish. It’s about more than just tasks; it’s the dedication to see things through, staying curious to solve problems, thinking from first principles and ensuring we fix our customer’s problems in the best possible way.”

The Role: Pushing the Speed Limits of Rust, Linux & I/O

We are looking for a Performance / Systems Engineer to join us at Source.dev . In this role, your primary metric of success is speed. You will dissect execution paths, eliminate kernel-space context-switching costs, optimize memory layouts, and ensure SourceFS runs as close to the hardware limits as physically possible.

What You’ll Work On

System Bottleneck Hunting: Profile, trace, and eliminate latency across CPU, memory, and disk I/O bottlenecks in Rust systems code using tools like perf, eBPF, valgrind, and custom microbenchmarks.

Kernel & File System Tuning: Deep dive into Linux kernel interactions, optimizing FUSE drivers, VFS caches, asynchronous I/O (io_uring), memory-mapped execution, and thread scheduling.

Memory & Cache Efficiency: Optimize data structures for cache locality, minimize allocation overhead, and eliminate unnecessary memory copies across boundary transitions.

Benchmarking Infrastructure: Design robust, reproducible benchmarking suites to measure micro- and macro-performance regression in high-concurrency environments.

Scaling Build Primitives: Squeeze peak performance out of massive build graphs (Android, Yocto, and more) running on high-core hardware configurations.

Ideal Candidate Profile:

The Performance Systems Mindset: You have a deep understanding of computer architecture (CPU caches, memory barriers, SIMD, system calls) and proven experience writing hyper-optimized code in Rust or C/C++.(or other). No prior experience with Rust required, just a willingness to learn is all we are looking for.

Scale-Obsessed: You have experience with (or a burning desire to fix) large-scale build systems and developer tooling.

Impact-Driven: You embody the "Own It" mentality - you see a friction point in the developer journey and you don’t stop until it’s gone.

Curious & Collaborative: You enjoy translating real-world customer problems into robust, production-grade solutions.

Low Ego, High Impact: Beyond being a brilliant coder, you are a thoughtful and empathetic teammate - someone who leads with kindness

Feedback Culture Champion: You embrace feedback and provide it thoughtfully; you see open, honest communication as the foundation of great teamwork.

A Note on Our Search

We are looking for the best talent, wherever it may be. If you’re on the fence about whether you’re a perfect fit, please do apply - we value diverse backgrounds and unique problem-solving approaches.

Why Join Source.dev ?

AI-Native Infrastructure: We merge deep systems expertise with AI to solve the "impossible" - using AI to automate complex merges and conflict resolution for the next generation of devices.

Architect the Future: Have a direct, visible impact on the infrastructure used to build the world’s most advanced hardware.

Early-Stage Ownership : You’ll have a seat at the table to shape our technical roadmap, product direction, and culture from day one.

Tier-One Partnerships: Work side-by-side with world-class customers, from global automotive giants to leading cloud providers.

Elite Engineering Culture: Join a high-trust & passionate team of engineers

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