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Founded in 2012 by cyber-security experts Eduardo Cruz, Josep Gaspar, and Josh Gabel, Qustodio is the global leader in online safety and digital wellbeing for families. In 2022, Qustodio became part of the Qoria group, protecting every child's digital journey through a world-class collaboration between schools, parents, and educators in cyber safety. Qoria's mission is to support families and schools to live and navigate smarter in an increasingly connected world. Together, we help millions of families and educators across the globe protect children from online harm, while promoting healthy digital habits and awareness.
We are seeking a passionate Senior i OS Engineer, skilled in building secure and high-performance applications, to join our dynamic team. As part of our mission to enhance digital safety, you will help shape our next-generation security services for millions of users worldwide.
What you will be doing with us :
Develop top-tier security-focused i OS applications to help users protect their mobile devices.
Tackle complex technical challenges related to network protocols, MDM integrations, and advanced i OS API interactions.
Own end-to-end i OS development across the entire stack, from UI / UX to backend integration.
Collaborate closely with cross-functional teams to design and implement scalable, maintainable, and secure mobile solutions.
Stay up-to-date with the latest i OS trends, tools, and industry best practices.
Drive R&D initiatives to push the boundaries of digital safety and mobile app performance.
What we’re looking for :
BSc / MSc academic background or equivalent experience.
5+ years of experience in i OS development, including building and releasing security-focused applications.
Expertise in Swift and modern i OS frameworks (Swift UI, Combine, Core Data, Cloud Kit).
Expertise in Clean Architecture and software design patterns to build scalable and maintainable apps.
Expertise in using tools to measure and optimize code performance (e.g., Instruments, Xcode Profiler).
Passion for networking and security problems.
Familiarity with CI / CD pipelines, Fastlane, and automation tools.
Knowledge of RESTful APIs and integrating i OS apps with cloud services.
Expertise in developing various types of tests, including unit tests, functional tests, and automated tests, as required.
Ability to document technical decisions clearly, including Architectural Decision Records (ADRs) and non-technical documentation for internal and external stakeholders.
Experience for shipping our software to a high number of users.
Result oriented person with good communication skills.
Fluency in English, the company’s official language.
Bonus Points :
Experience with Backend development.
What can we offer you :
Great culture - friendly and emphasizes both teamwork and fun.
Our company is home to over 18 nationalities.
Flexible working hours - and there are possibilities to work from home.
Interesting challenges in a fast-growing technology company for you to grind your skills.
Competitive salary range.
Private health insurance.
In-house training and team building events.
A modern and fully equipped office headquarters in Barcelona city center.
Daily fruit and beverages supply.
Daily catering for lunch.
23 days of holidays per year. Half day off on your birthday.

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