Principal Mobile Developer (iOS) - Berlin / Remote

Get to know us

At eyeo, we transform the internet into a trusted, sustainable and accessible place where users regain control over their experience, content creators and publishers are rewarded for their content, and advertisers and consumers can connect on mutually agreed terms. 

With multiple brands across the ad tech space, eyeo offers solutions for publishers, advertisers, ad-tech solutions providers and over 400 million ad-filtering users worldwide. eyeo’s market-leading ad-filtering technology powers products like Adblock Plus and AdBlock as well as technical integrations for popular browsers and smartphone OEMs. 

Our subsidiary, Blockthrough, is the most popular ad block recovery solution among the Comscore-150, offering premium demand via direct seats with top-tier SSPs, allowing effective content monetization and providing a platform where publishers and advertisers can efficiently transact.

We believe in creating a positive and empowering workplace where work-life balance is a priority. With a dedicated learning and development budget, you'll have the tools to grow and advance your skills, while contributing to clearly defined personal and company goals. Our people-first culture ensures you feel appreciated for your work and know that your contributions truly matter.

Your day-to-day activities

Bad ad experiences and malicious sites are killing the internet. We are taking on the fight to restore user’s sanity, privacy and choice from the desktop browser to mobile; and we need you to help us!  It’s a huge mission as we will have to tackle multiple integration points and partnerships and provide this all at scale to a massive user base. Your knowledge and experience providing technical guidance and leadership over large complex projects is exactly what we need to bring this new project to life.  Also essential will be your experience of collaborating with multiple product owners and other teams. 

• Design and implement high-quality iOS features using Swift, SwiftUI, Combine, and modern architectures
• Build sophisticated solutions that integrate with network protocols (HTTP/S, DNS, VPN/WireGuard) and Web Extensions to deliver robust content filtering and privacy enhancements
• Continuously improve app performance, scalability, and stability through proactive optimization and rigorous testing
• Collaborate with other engineers, Product Managers, UI/UX Designers, and cross-functional leaders to drive strategic alignment on product goals, ensuring cohesive user experiences across multiple teams and products
• Guide senior developers in advancing their technical expertise and drive high-impact code review processes
• Lead the adoption of evolving Apple frameworks, guidelines, and industry best practices to drive innovation and ensure compliance across the organization

What you bring to the table

• 8+ years of professional iOS development experience, with deep proficiency in Swift and SwiftUI
• Demonstrated experience implementing and optimizing solutions that leverage complex networking (HTTP/S, DNS, VPN/WireGuard) and security measures (encryption, secure communication, and data handling)
• Knowledge and experience shaping requirements and interfaces with backend service teams
• Strong familiarity with Network Extensions, Web Extensions, URLSession, and Core Data, as well as advanced performance optimization
• Commitment to maintaining a high bar for code quality with unit tests (XCTest) and adherence to Apple’s Human Interface Guidelines and security standards
• Excellent ability to translate technical concepts across teams, provide mentorship, and maintain collaborative and effective working relationships
• Passionate about app performance, logging, analytics, monitoring and system health
• Able to work directly with product and UX to prototype, test and develop concepts

It’s awesome if you have

• Experience using NEKit or similar frameworks
• Cross-platform iOS/macOS development experience
• Experience using UIKit and AppKit UI frameworks
• Knowledge of JavaScript for Web Extensions
• Background in VPNs, network security, or privacy-focused applications
• Familiarity with Swift Package Manager
• Contributions to open-source projects or a strong technical blog presence
• Implement features that utilize iOS accessibility APIs to create inclusive user experiences for all users

How and where we work

eyeo is a global employer with over 300 colleagues based all over the world. We love our diversity and take great pride in our company culture. We practice an independent, remote workstyle with work distributed in cross-functional matrix teams that span predominantly EST and CET time zones. If working remotely isn’t for you, we also have our HQ in Berlin and offices in Cologne, Toronto and soon in NYC that you can choose to work from. Our in-person team and company meetings foster community and collaboration. By enabling remote work and in-person sessions, we have built a culture that provides a unique dynamic of flexibility and belonging.

What we offer

• Work remotely or from one of our offices —we trust you to find what works best for you 
• Full package of benefits* (health insurance, choice of hardware, paid vacation days, professional development and relocation budget, sabbatical leave, etc.)

*Some benefits vary subject to the hiring location.

Equal Opportunity Statement 

At eyeo, we are committed to fostering an inclusive environment where every employee is empowered to thrive. We believe that the diversity of our backgrounds and experiences enhances our products and services, and we take pride in being a safe space for everyone. 

All qualified applicants will receive equal consideration for employment, regardless of race, color, nationality, religion, sexual orientation, gender, gender identity, age, physical ability, or duration of unemployment. We celebrate diversity and are dedicated to creating a workplace where everyone feels valued and respected.

Privacy Notice

When you apply, you’ll be automatically forwarded to our recruitment platform operated by an external service provider called Greenhouse (seated in the US). Greenhouse collects some information on its website, such as anonymous usage statistics, by using cookies, server logs, and other similar technology. For more information, please refer to Greenhouse’s Privacy Policy. All documents and information provided by you are stored with Greenhouse. In order to ensure an adequate level of data protection, eyeo and Greenhouse have entered into the EU Standard Contractual Clauses (“processors”) - Commission Decision C(2010)593. You can request a copy of this by contacting us at privacy[at]eyeo.com. If you don’t want your data forwarded to Greenhouse, please do not apply. For detailed and further information, please refer to our Privacy Policy at https://eyeo.com/en/privacy.