Senior iOS Engineer

For our client, a global technology and communications-platform company, we are looking for Senior iOS Engineers to join an experienced product team in Stockholm. This is an opportunity to work on a large-scale application used by hundreds of millions of users each month. You will take ownership across the full iOS development lifecycle; from technical design and architecture through implementation, testing and deployment. Key responsibilities Design, develop and maintain the iOS application. Deliver new features in close collaboration with product, design and backend teams.Ensure high application performance, quality, reliability and responsiveness.Contribute to architecture and technical-design decisions.Participate actively in code reviews and help maintain high engineering standards.Take part in planning, development, testing and deployment activities throughout the software development lifecycle. Ideal candidate profile At least 5 years of professional experience in iOS development.Advanced proficiency in Swift.Strong understanding of iOS architecture, SDKs, asynchronous server communication and UX optimisation.Proven experience debugging and troubleshooting complex systems.Experience planning, leading and delivering core functionality in large-scale applications.Ability to work effectively with requirements and collaborate in broad, cross-functional teams.Experience working in Agile development environments.Fluent English and Swedish, spoken and written.Nice to haveExperience with SwiftUI.Familiarity with automation tools such as GitHub Actions and Fastlane.Experience mentoring and onboarding junior developers. Conditions Location: Stockholm, Sweden.Work model: Hybrid, with up to 40% remote work.Workload: Full-time, 100%.Assignment period: September 2026 - December 2026.Rate: Up to 750 SEK per hour (B2B contract). Recruitment steps Initial call with a recruiter (up to 30 minutes).Interview(s) with the Client.Final decision and feedback.