
Step into a leadership role in a forward-thinking organization dedicated to engineering excellence. As our Senior Kotlin Developer, you will spearhead the design, development, and optimization of Kotlin-based applications, ensuring security, scalability, and outstanding user experience for our core platforms. Collaborate across disciplines to deliver new features, drive modernization, and help shape how our digital products evolve.
We are looking for a proactive and experienced Kotlin Developer with a strong background in building enterprise-level applications on the JVM (Java Virtual Machine) and/or Android. In this senior position, you will play a key role in end-to-end product development, mentor fellow engineers, and work closely with cross-functional stakeholders to translate business needs into technical solutions.
19 Koninginnegracht, Centrum, 2514 AB, Den Haag

More than 250 Employees
Hiring on JOB TODAY since September, 2025
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Build and maintain APIs

Build and maintain APIs

Join a forward-thinking technology company passionate about creating innovative and user-friendly mobile applications. At our organization, we foster a diverse, inclusive, and collaborative culture where everyone's ideas are valued and professional growth is encouraged. As we continue to expand our engineering team, we are looking for motivated individuals who want to make a tangible impact in the world of iOS app development. 📱 Position Overview -- iOS Developer \| Swift \& Mobile Application Development As an iOS Developer, you will drive the design, development, and maintenance of high-quality mobile applications for the iOS platform. You'll collaborate closely with UX/UI designers, backend engineers, and product managers to deliver intuitive and performant user experiences. Your expertise in Swift, UIKit, and Apple's development best practices will be key as you help us build the next generation of impactful mobile solutions. 🎯 Key Responsibilities -- iOS App Development \& Technical Collaboration • Design, develop, and maintain scalable iOS applications using Swift and modern iOS frameworks., • Work cross-functionally with design, product, and engineering teams to deliver seamless mobile user experiences., • Write clean, maintainable, and testable code while contributing to code reviews and maintaining high development standards., • Implement innovative features

Be part of an innovative technology company dedicated to building impactful, scalable web and mobile platforms. We foster a collaborative, diverse, and inclusive environment where every team member is empowered to drive technical excellence and professional growth. As we expand our engineering team, you will have the unique chance to shape our backend systems and help deliver exceptional digital experiences. 💻 Role Overview -- Backend Developer: Server-Side Development, API Design, and System Scalability As a Backend Developer, you will design, develop, and maintain robust backend services and APIs that power our core applications. Working cross-functionally with frontend engineers, product managers, and UX/UI teams, you will create secure, scalable, and high-performance server-side solutions. Your attention to detail, problem-solving skills, and passion for code quality will help us continuously raise the standard for technical excellence. 🎯 Key Responsibilities -- Backend Engineering \& API Development • Develop, optimize, and maintain scalable backend systems and RESTful APIs to support web and mobile applications., • Collaborate with cross-functional teams to translate business requirements into technical solutions., • Implement best practices for database design, data modeling, and system integration., • Ensure application security, data protection, and reliability by following industry standards., • Write clean, maintainable, and testable code while performing code reviews for peers., • Troubleshoot, debug, and resolve backend issues to provide seamless user experiences., • Monitor application performance and proactively implement improvements for scalability and efficiency., • Contribute to ongoing architectural decisions and participate in sprint planning and agile ceremonies. ✅ Required Qualifications -- Backend Programming, Database, and Cloud Experience • Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience., • Solid hands-on experience with a modern backend programming language such as Node.js, Python, Java, or Go., • Knowledge of