Performance Systems Engineer - Rust & Linux I/O

Sourcedev; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

AI-Native Infrastructure

Direct Impact

Early Ownership

Tier-One Partnerships

Elite Engineering Culture

Job summary

Source.dev in the United Kingdom is seeking a Performance / Systems Engineer to drive speed and efficiency in SourceFS. You will dissect execution paths, reduce kernel-space costs, optimize memory layouts, and push performance toward hardware limits in Rust or C/C++.

You will profile bottlenecks, tune Linux kernel interactions (FUSE, io_uring, VFS), improve memory and cache efficiency, and design robust benchmarking for high-concurrency builds (Android, Yocto).

Qualifications

• Deep understanding of computer architecture and system calls.
• Experience with large-scale build systems and developer tooling.
• Ownership mentality and problem-solving drive.
• Curious and collaborative with strong communication.
• No prior Rust experience required; willingness to learn.

Responsibilities

• Profile, trace, and eliminate latency across CPU, memory, and disk I/O bottlenecks in Rust/C/C++ systems.
• Tune Linux kernel interactions, FUSE drivers, VFS caches, and asynchronous I/O.
• Optimize data structures for cache locality and memory efficiency.
• Design robust benchmarking suites for high-concurrency environments.
• Scale build primitives for large graphs on high-core hardware.

Skills

Performance Systems Mindset

Scale-Obsessed

Rust/C++ Expertise

Kernel Tuning

Profiling & Benchmarking

Tools

perf

eBPF

valgrind

io_uring

Job description

Source.dev in the United Kingdom is seeking a Performance / Systems Engineer to drive speed and efficiency in SourceFS. You will dissect execution paths, reduce kernel-space costs, optimize memory layouts, and push performance toward hardware limits in Rust or C/C++.

You will profile bottlenecks, tune Linux kernel interactions (FUSE, io_uring, VFS), improve memory and cache efficiency, and design robust benchmarking for high-concurrency builds (Android, Yocto).