Staff Mobile Engineer - Tech Lead

Flightradar24 is one of the most successful growth-stage tech companies in Stockholm. Each month more than 50 million aviation enthusiasts visit Flightradar24 (app/website) and our Commercial services team has many of the biggest names in aviation on its customer list.

We’re looking for a seasoned Staff Mobile Engineer, Tech Lead to take ownership of our mobile technical direction across both iOS and Android.

In this role, you will act as the technical anchor for our mobile teams, driving architecture decisions, shaping our long-term strategy, and mentoring a team of 10 engineers. While your core expertise is within iOS, you bring a cross-platform mindset and are comfortable bridging the gap between iOS and Android to ensure consistency, scalability, and excellence across both platforms.

The position requires that you are able to work from our office in Stockholm, Sweden. Relocation is not offered for this role.

What you’ll do

• In this role, you will take end-to-end ownership of our mobile technical direction, shaping how we build, scale, and evolve our apps across both iOS and Android. You’ll operate at the intersection of hands-on engineering, architecture, and leadership – setting the standards for how a high-performing mobile team works.

You will play a key role in modernizing our mobile platforms, driving architectural decisions, and ensuring a consistent and scalable approach across both ecosystems. At the same time, you’ll collaborate closely with cross-functional teams to deliver seamless user experiences to millions of users worldwide.

Your responsibilities include:

• Owning the mobile technical roadmap, including architecture, engineering standards, and long-term scalability across iOS and Android
• Leading the evolution of our iOS platform while driving cross-platform alignment in architecture, patterns, and best practices
• Modernizing and refactoring our codebase into a modular, testable setup, while improving CI/CD, build performance, and release workflows
• Collaborating closely with engineering, product, design, and QA to deliver high-quality user experiences at a global scale
• Mentoring and guiding engineers, fostering a culture of technical excellence, ownership, and continuous improvement

Current tech stack

• iOS: Swift, SwiftUI, UIKit, async/await
• Android: Kotlin, Jetpack Compose
• Architecture: MVVM, Clean Architecture, modularization
• CI/CD: Fastlane, Xcode Cloud, GitLab

Who you are

• You are a senior mobile engineer with a strong foundation in iOS development and a genuine interest in building scalable, high-quality mobile products. To succeed in this role, you have experience from mentoring engineers, and ideally have previous experience working in a Tech Lead or similar leadership role.

You have experience working with complex systems and understand what it takes to modernize and evolve a mobile codebase over time. While iOS is your core strength, you are confident navigating cross-platform environments and contributing to alignment across iOS and Android teams.

You care deeply about code quality, testing, and developer experience, and you take pride in building maintainable, well-structured solutions and great end-user experience. At the same time, you are a collaborative and communicative team player who enjoys mentoring others and creating alignment across teams.

We believe you bring:

• Deep expertise in iOS development, including Swift, UIKit, SwiftUI, and modern concurrency
• Experience contributing to or leading architectural decisions in large-scale mobile applications
• A solid understanding of cross-platform development, with the ability to collaborate with and guide Android teams
• Strong knowledge of software design principles, testing practices, and CI/CD workflows
• A proactive mindset, with a drive to improve performance, reliability, and ways of working

We see it as a bonus if you have…

• Experience working with real-time data or high-frequency data rendering
• Knowledge of map and geospatial technologies (e.g. MapKit, Google Maps SDK)
• Experience optimizing performance for large datasets and animations on mobile
• Familiarity with background processes, location services, and push notification systems
• An interest in aviation, flight tracking, or real-time data products

About Flightradar24

With over 6 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 world
• Flexible and social work environment with free beverages, fruit, and snacks
• Modern office in the heart of beautiful downtown Stockholm, Sweden
• Being part of a diverse team with +30 nationalities and 6 continents represented with English being our main language

Flightradar24 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 glance

• Largest ADS-B network in the world with over 55,000 connected receivers
• 5+ million users per day
• 100+ million app downloads