> Markdown version of [/jobs/ext/1687524-senior-ios-developer](https://www.wearedevelopers.com/jobs/ext/1687524-senior-ios-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Ios Developer - **Company:** Smadex SLU - **Location:** Laza, Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Android Software Development, Apple IOS, Mobile Application Development, Software Quality, Code Review, Software Debugging, Interoperability, IOS SDK, Performance Tuning, Multithreading, Ios Frameworks, Cocoapods, Objective C++ - **Published:** July 31, 2026 - **Apply:** https://www.buscojobs.com.es/senior-ios-developer-en-laza-ID-365016849 ## About the Role 5+ years of professional iOS development experience. Expertise in Swift Good understanding of multithreading, networking, and iOS internals. Deep knowledge of XCFramework distribution and dependency managers (SPM, CocoaPods). Familiarity with performance optimization, debugging, and mobile development best practices. Strong communication and collaboration skills, with a willingness to learn and contribute to team knowledge. A genuine passion for mobile technology, staying updated with the latest advancements, and contributing to the iOS ecosystem. Bonus Points Experience with mobile advertising technologies such as MRAID and VAST. Deep understanding of Objective-C interoperability . Experience with SkadNetwork Knowledge of building and distributing iOS libraries or SDKs. Familiarity with Unity plugins for iOS. Please note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered. ## Description Smadex is a cutting-edge ad-tech company: we process more than4.5 million ad requests per second, replying inunder 100ms. Every day, we generate several TBs of data that need to be processed, analyzed, and aggregated so that our real-time components get smarter every day.?This is a full-time hybrid position based in Barcelona.As a pivotaliOS SDK Developer, you'll be instrumental in transforming our foundational SDK prototype into a robust, market-ready product. This new SDK is strategically vital, designed to expand the functionality and provide critical insights into the supply chain of our pre-established and robust DSP.This is a full-time, hands-on role where you'll join an established iOS team. You'll own the development of the iOS SDK, focusing on completing core functionalities, architecting for optimal performance, and building out essential features. Your work will directly define the future and quality of our mobile ecosystem, working in close alignment with our Android SDK development to ensure a unified product experience.The OpportunityCollaborate in the design and full-lifecycle development of our new iOS Ads SDK.Proactively drive performance optimization, quality enhancements, and robust testing for the SDK.Stay at the forefront of iOS advancements, integrating latest platform capabilities and industry best practices.Ensure seamless integration of the SDK with the broader Smadex platform through close collaboration with cross-functional teams.Champion code quality, actively participating in rigorous code reviews, comprehensive testing, and effective debugging processes.Requirements and Qualifications5+ yearsof professional iOS development experience.Expertise inSwiftGood understanding of multithreading, networking, and iOS internals.Deep knowledge ofXCFrameworkdistribution and dependency managers (SPM, CocoaPods).Familiarity with performance optimization, debugging, and mobile development best practices.Strong communication and collaboration skills, with a willingness to learn and contribute to team knowledge.A genuine passion for mobile technology, staying updated with the latest advancements, and contributing to the iOS ecosystem.Bonus PointsExperience with mobile advertising technologies such as MRAID and VAST.Deep understanding ofObjective-C interoperability.Experience with SkadNetworkKnowledge of building and distributing iOS libraries or SDKs.Familiarity with Unity plugins for iOS.Please note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered.What's in it for youIntegrate a highly motivated and young team.Great compensation package.Top location at the heart of Barcelona in a penthouse office with a rooftop terrace, barbeque, and a fully stocked fridge.Work from home: 2 days/weekPrivate Health InsuranceAccess to LinkedIn LearningMeal vouchers - Tickets Restaurant monthly allowance.Monthly gym allowance: Choose between DiR Gym and WellhubMonthly TGIF events.Regular team-building events.Fun and friendly work environment with talented marketers and engineers from over 40+ countriesAnd more! ## Related Videos - [Hacking iOS and Developing for Airbnb with Nicolas Haunold, Software Engineer at Airbnb](https://www.wearedevelopers.com/videos/100361-hacking-ios-and-developing-for-airbnb-with-nicolas-haunold-software-engineer-at-airbnb) - [Unleash your web skills on native!](https://www.wearedevelopers.com/videos/122-unleash-your-web-skills-on-native) - [Xcode development redefAIned](https://www.wearedevelopers.com/videos/100195-xcode-development-redefained) - [The perfect CI/CD React Native pipeline with Fastlane](https://www.wearedevelopers.com/videos/556-the-perfect-ci-cd-react-native-pipeline-with-fastlane) - [Introducing Kotlin Multiplatform in an existing project](https://www.wearedevelopers.com/videos/276-introducing-kotlin-multiplatform-in-an-existing-project) - [From Zero to Mobile Developer in 45 Minutes With SwiftUI](https://www.wearedevelopers.com/videos/183-from-zero-to-mobile-developer-in-45-minutes-with-swiftui) ## Related Articles - [Cross Platform Mobile Development Frameworks to Use in 2025](https://www.wearedevelopers.com/magazine/404-cross-platform-mobile-development-frameworks-to-use-in-2025) - [Spanish Business Culture and Etiquette](https://www.wearedevelopers.com/magazine/353-spanish-business-culture-and-etiquette) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [A Guide to Choosing the Right Tools for App Developers](https://www.wearedevelopers.com/magazine/391-a-guide-to-choosing-the-right-tools-for-app-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)