Rust Edge & Mobile Systems Engineer (Remote)

Jobgether; España; Remote; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Fully remote

Flexible hours

International team

Open-source tech

Conference attendance

Technical ownership

Advanced infrastructure

Job summary

Jobgether, on behalf of a partner company, seeks a Software Engineer (Edge – Devices & Mobile) based in Spain. You will design and maintain a cross‑platform Rust peer runtime across Windows, Android, and Linux, with future macOS support, focusing on security and reliability.

You will work at the intersection of systems, mobile platforms, and distributed infrastructure, owning components, improving observability, and collaborating with global teams.

Qualifications

• 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 Windows, macOS, and Android, including 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 OS APIs, including JNI/NDK, Win32, and POSIX interfaces.
• Solid knowledge of networking protocols, particularly TCP, TLS, and HTTP, with ability to inspect traffic and analyze fingerprint differences.
• Experience with asynchronous programming and networking in Rust (e.g., Tokio, Tonic).
• Strong focus on reliability, observability, performance monitoring, and production operations for distributed device fleets.
• Good understanding of secure software design for third-party devices and environments.
• Excellent written communication and ability to collaborate in a remote-first, globally distributed team.
• Interest in reverse engineering, networking, and complex systems; familiarity with gRPC, Protocol Buffers, mTLS, Chromium networking, Kotlin/Java, Prometheus, Grafana, OpenTelemetry, Kubernetes, and cloud infra is advantageous.

Responsibilities

• Design, develop, and maintain a cross-platform Rust peer runtime across Windows, Android, Linux, with macOS in scope.
• Manage process lifecycles, background execution, networking, updates, and stability across diverse hardware.
• Lead platform expansion to Android devices using NDK and JNI, addressing foreground services and battery considerations.
• Integrate native networking technologies (Cronet, C++) and HTTP clients into Rust libraries.
• Work with OS APIs and FFI, ensuring safe memory management and cross-language interoperability.
• Collect and analyze hardware and OS signals (TCP, TLS, HTTP) to improve realism and support cross-team collaboration.
• Develop device-level observability and performance metrics (uptime, bandwidth, availability, drop-offs, success rates).
• Expand capabilities to support additional workloads while maintaining security boundaries around untrusted content.
• Participate in on-call rotations, investigate incidents, and drive reliability and deployment improvements.
• Contribute to documentation, architecture proposals, design reviews, and Rust development standards.

Skills

Rust

FFI

JNI/NDK

Cross-platform development

Networking

Tokio

Tonic

OpenTelemetry

Kubernetes

Prometheus

Grafana

gRPC

Protocol Buffers

mTLS

Kotlin/Java

Chromium networking

Tools

Cronet

JNI/NDK

Win32

POSIX

OpenTelemetry

Kubernetes

Prometheus

Grafana

Chromium networking

Job description

Jobgether, on behalf of a partner company, seeks a Software Engineer (Edge – Devices & Mobile) based in Spain. You will design and maintain a cross‑platform Rust peer runtime across Windows, Android, and Linux, with future macOS support, focusing on security and reliability.

You will work at the intersection of systems, mobile platforms, and distributed infrastructure, owning components, improving observability, and collaborating with global teams.