Remote Senior C++ Engineer — Mobile Networking & Core Stack

Randstad Technologies Recruitment; City Of London; On-site; GBP 70,000 - 110,000; Full time

Job summary

Randstad Technologies Recruitment is seeking a Senior C++ Engineer specializing in Mobile Infrastructure for a fully remote contract role. You will work on a mature C++ core shared library across iOS and Android, focusing on production-grade code and scalable architecture.

The role emphasizes refactoring, modernizing protocols, observable telemetry, and sunsetting legacy components without impacting hundreds of millions of users.

Qualifications

• 5+ years of production C++ experience in infrastructure or mobile engineering.
• Experience shipping multi-platform (Android/iOS) SDKs.
• Deep knowledge of HTTP/2, WebSockets, and network resilience.

Responsibilities

• Refactor and modularize a mature C++ core shared library across iOS and Android.
• Shape client-server contracts and optimize real-time messaging.
• Build telemetry and metrics to diagnose latency and performance across the stack.
• Sunset legacy networking components without interrupting user experience for hundreds of millions of clients.

Skills

C++

Mobile development

Android/iOS

HTTP/2

WebSockets

SDK development

Job description

Randstad Technologies Recruitment is seeking a Senior C++ Engineer specializing in Mobile Infrastructure for a fully remote contract role. You will work on a mature C++ core shared library across iOS and Android, focusing on production-grade code and scalable architecture.

The role emphasizes refactoring, modernizing protocols, observable telemetry, and sunsetting legacy components without impacting hundreds of millions of users.