Software Engineer (Edge - Devices & Mobile)

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Software Engineer (Edge – Devices & Mobile) based in Belgium. We are looking for an experienced Software Engineer with strong Rust expertise to help build and scale a sophisticated, cross-platform device infrastructure. In this role, you will develop and maintain a reliable peer runtime across Windows, Android, and Linux, with future expansion to macOS. You will work at the intersection of systems engineering, mobile platforms, networking, and distributed infrastructure. A key focus will be bringing advanced capabilities to mobile devices while ensuring seamless performance, security, and reliability across a globally distributed fleet. You will collaborate closely with senior engineers and cross-functional teams to solve complex technical challenges. This is an opportunity to take significant ownership of critical infrastructure, influence architectural decisions, and contribute to innovative large-scale data collection systems. Accountabilities: - Design, develop, and maintain a cross-platform Rust peer runtime supporting Windows, Android, and Linux, with future compatibility for macOS. - Manage process lifecycles, background execution, networking, automatic updates, and operational stability across diverse and unmanaged hardware environments. - Lead the expansion of the platform to Android devices using NDK and JNI, addressing foreground services, battery optimization, mobile network constraints, and integration with real and emulated device environments. - Integrate native networking technologies, including Chromium's network stack (Cronet and C++), and browserless clients into well-structured, reliable Rust libraries.

- Work with native operating system APIs and foreign function interfaces (FFI), ensuring safe memory management, ownership, and cross-language interoperability. - Collect and analyze hardware and operating system signals, including TCP, TLS, and fingerprints, to improve network realism and support collaboration with browser and anti-detection engineering teams. - Develop comprehensive device-level observability and performance metrics, monitoring uptime, bandwidth consumption, device availability, drop-off rates, and task success rates. - Expand peer capabilities to support additional workloads, including CAPTCHA solving and browser rendering, while maintaining strong security boundaries around untrusted content and environments. - Participate in on-call rotations, investigate production incidents, conduct post-mortems, and implement improvements to system reliability and deployment processes. - Contribute to technical documentation, architecture proposals, design reviews, and engineering standards, helping establish best practices for cross-platform Rust development. Requirements: - At least 5 years of professional experience developing, shipping, and maintaining production-grade software using Rust. - Proven experience building and deploying cross-platform Rust applications on at least two operating systems among Windows, macOS, and Android, including experience with at least one mobile platform. - Strong understanding of operating system internals, process management, permissions, background execution, and platform-specific constraints. - Hands-on experience with FFI and integrating Rust with C/C++ libraries and native operating system APIs, including JNI/NDK, Win32, and POSIX interfaces. - Solid knowledge of networking protocols, particularly TCP, TLS, and with the ability to inspect network traffic, understand protocol-level behavior, and analyze client fingerprint differences. - Experience with asynchronous programming and networking in Rust, ideally using technologies such as Tokio and Tonic.