Senior iOS Engineer

Project overview

Framework:

For an international client, we are looking for an experienced Senior iOS Engineer (m/f/d) for freelance support. In this role, you will develop and optimize business-critical iOS applications and work closely with product managers, designers, and fellow developers in a purely English-speaking, agile setting.

• Project type: Nearshore
• Hourly rate max. €40/h
• Project language: English
• Project start: 01.01.2027
• Duration: 6 months (option to extend available)
• Utilization: 100% (full-time)
• Location: 100% Remote (no on-site requirement; open to freelancers residing/working in Spain or countries within the GMT+1 time zone)

Responsibilities

Our Requirements

• Feature Development: Conception, design, and implementation of new native features for existing and future iOS applications.
• Performance Optimization: Analysis of bottlenecks, profiling, and optimization of existing systems to ensure current Apple standards and minimal latency.
• Architecture & Scalability: Close collaboration with the development team to establish robust, maintainable, and future-proof software architectures.
• Business Translation: Coordination with product managers to translate business requirements into viable technical solutions.
• Platform Compatibility: Ensuring consistent functionality and display across various end devices, screen sizes, and iOS versions.
• Quality Assurance: Active performance of code reviews to maintain the highest quality, clean code, and testing standards.
• Development Experience: At least 3 years of professional practical experience in native iOS development.
• Language Stack: Expert knowledge in Swift and sound knowledge of Objective-C.
• Architecture: Solid understanding of modern iOS architecture components and design patterns (e.g., MVVM, Clean Swift, VIPER).
• Performance & Profiling: Strong knowledge in mobile performance optimization and routine use of profiling tools (e.g., Instruments).
• Engineering Practice: Experience with Clean Code, modular code structuring, and agile working methods (Scrum/Kanban).
• Communication: Fluent English, both spoken and written.
• Work Location / Time Zone: Residing in Spain or in a country within the GMT+1 time zone.

Nice to have

• Domain Knowledge: More than 1 year of experience with event booking platforms, booking software, or corresponding admin products.
• Education: Completed degree in Computer Science, Software Development, or a comparable qualification.

Project details

• Start: date 1/2027
• Duration: 6 months
• Remote: remote
• Location: Barcelona, Spain, ES
• Languages: German