Senior iOS Engineer

Flightradar24 is one of Stockholm’s most successful growth-stage tech companies, with over 5 million daily users across our mobile and web platforms. Our app is the world’s most popular flight tracking service, consistently ranking at the top of the App Store and Google Play charts. Alongside our consumer-facing products, we provide a wide range of commercial services trusted by leading airlines, airports, and aviation organizations worldwide.We are looking for a highly skilled senior iOS Engineer to join our mobile team in Stockholm. You’ll work hands-on at architectural scale - shaping our mobile architecture, guiding technical decisions, mentoring others, and building new features for millions of aviation enthusiasts. At Flightradar24, you’ll join a diverse, international team with over 30 nationalities represented, working together to push the boundaries of aviation data.Note that this position requires that you are able to work in Stockholm, Sweden. Relocation is not offered for this role.What you’ll doBuild new features and improve existing ones in our iOS app - used by millions of users every day.Write clean, efficient, and testable Swift code using both UIKit and SwiftUI.Collaborate closely with iOS and Android engineers, designers, QAs, backend engineers and product owners to deliver high-quality experiences.Contribute to architecture discussions and help shape how we build scalable, maintainable mobile software.Continuously refactor and modernize our codebase, adopting the latest iOS technologies and best practices.Improve and maintain automated testing, ensuring releases are fast, stable, and reliable.Participate in code reviews, mentor engineers, and share knowledge across the team.Take part in app release coordination and ensure smooth deployments through CI/CD pipelines.Who you areExperienced iOS engineer (5–8 years) with a strong track record of shipping high-quality consumer apps.Proficient in Swift, with solid understanding of UIKit, SwiftUI, and modern concurrency (async/await).Strong grasp of software architecture patterns (MVVM, Clean Architecture, or similar).Passionate about writing clean, maintainable, and well-documented code.Comfortable with testing frameworks (XCTest, Snapshot tests) and CI/CD tools (Fastlane, Codemagic, GitHub Actions, Xcode Cloud).Curious, proactive, and eager to improve developer experience and overall app performance.Great communicator and collaborator who enjoys teamwork, feedback, and shared success.Bonus: experience with Firebase, MapKit, or StoreKit.About Flightradar24With over 4 million daily users, Flightradar24 is the world’s most popular flight tracking service. Our app regularly tops the App Store and Google Play Travel charts. We also offer a wide range of commercial services and our customers include many of the biggest names in aviation.We're constantly adding new services and improving existing products. To help us meet those challenges, we're looking for creative, collaborative and tech-savvy applicants to join us.Benefits of working at Flightradar24 include:Opportunity to impact a service with millions of end users from all around the worldFlexible and social work environment with free beverages, fruit, and snacksModern office in the heart of beautiful downtown Stockholm, SwedenBeing part of a diverse team with +30 nationalities and 6 continents represented with English being our main languageFlightradar24 started as a hobby project in 2006 when two Swedish aviation geeks decided to build a network of ADS-B receivers in Northern and Central Europe. In 2009 we opened up the network, and made it possible for anyone with an ADS-B receiver to upload data to the network. Many parts of the world were quickly covered, but the quest to provide global ADS-B coverage is still ongoing.Flightradar24 at a glanceLargest ADS-B network in the world with over 50,000 connected receivers5+ million users per day100+ million app downloads