Senior iOS engineer with Strong C++ experience

We’re now looking for a Senior iOS engineer with strong C++ experience to join as a contractor, and help with modularization, modernization, and integration work in the Connectivity SDK.

The Opportunity
Platform Mission creates the technology that enables the company to scale globally, experiment rapidly, and build for a billion users. From client connectivity to infrastructure, we amplify innovation, productivity, and quality across all engineering teams.
This is a chance to work on the core connectivity foundation - improving the reliability, latency, and efficiency of how every client talks to our backend systems. You’ll join early in the formation of a new squad, shaping the technical direction and helping Core Infra build out mobile expertise.
As a senior consultant of the new Connectivity squad, you’d be expected to:
Help shape the technical direction for their client-to-backend networking stack.
Influence Core Infra’s mobile infrastructure capabilities and long-term architecture.
Work on systems that directly impact app reliability, startup time, latency, and user experience across platforms.

Key responsibilities:
Refactor and modularize existing SDK components (iOS and C++), defining interfaces, ownership boundaries, testing strategies, and build/CI hygiene.
Design robust interfaces and ownership boundaries across mobile and backend systems.
Implement and maintain metrics and telemetry to enable end-to-end debugging and observability.
Collaborate with other engineers, PM, EM and partner teams to align on technical priorities and squad goals.
Contribute to long-term architectural decisions for the Connectivity SDK, sharing knowledge and establishing best practices for mobile infrastructure within Core Infra.

What we are looking for
5+ years of experience in mobile or platform engineering, with deep iOS expertise (Objective-C / Swift).
Solid C++ experience and ability to navigate large, multi-platform codebases.
Proven track record of building and shipping production-grade SDKs or mobile infrastructure components.
Deep understanding of networking fundamentals: HTTP/2+, WebSockets, retries/backoff, caching, and offline resilience.
Strong debugging, profiling, and performance optimization skills.
Experience with CI/CD systems, build automation, and modularization at scale.
Comfortable working in a fast-moving, forming team with a mix of permanent and contract engineers.
Strong communication skills; comfortable collaborating across mobile, backend, and infrastructure domains.

Start: ASAP
End: 2026-12-31
Workplace: Sweden