iOS Engineer

Start date: ASAP Scope: Full-time Location: Malmö (5 days onsite) Assignment Description An international organization is seeking an iOS Engineer specializing in system-level development, background services, and platform logic. This role is well suited for someone who enjoys understanding how systems work under the hood and building stable, scalable components that run reliably at scale. The assignment is a consulting engagement where you will be employed by Zcelero AB and work on-site with one of Zcelero’s clients in Malmö. You will work with long-running processes and services where robustness, performance, and reliability are critical. The role involves designing and implementing components that handle asynchronous flows, concurrency, and low-level system interactions in an efficient and secure way. You will collaborate closely with other engineers and stakeholders, contributing to architectural decisions, code quality, and the continuous evolution of the platform. Key Responsibilities Develop and maintain system-level components and background services within iOS Design and implement robust and efficient solutions for long-running processes Work with concurrency and asynchronous programming (e.g. async/await, GCD) Ensure high standards of code quality, performance, and reliability Analyze and optimize system behavior at a low level Collaborate with engineers on architecture and technical solutions Contribute to continuous improvement of development practices and codebase Requirements (Must-have) Several years of experience in iOS development (Swift, Objective-C, or similar) Strong foundation in computer science fundamentals (algorithms, data structures, system architecture) Strong algorithmic skills and solid theoretical computer science knowledge Experience with threading, concurrency, and asynchronous programming (e.g. async/await, GCD) Ability to write robust, efficient, and fault-tolerant code for long-running processes Strong communication skills and fluency in English A genuine curiosity about how modern platforms and frameworks evolve Nice to Have Experience developing system services, frameworks, or daemons on iOS or macOS Knowledge of security, privacy, encryption, or communication protocols Experience working with complex or distributed systems Familiarity with Bluetooth or other low-level communication layers Deep understanding of modern Swift concurrency (structured concurrency, actors, async/await) We look forward to receiving your application!