Android Developer

Salary: 960 - 1200 PLN/MD + VAT (B2B) Work Model: remote   Why choose this offer? • Impact on the development of the largest e-commerce system in Poland • You can expect a flexible work organization • The Jit community will bring you a nice time during regular integration meetings   Project We are looking for a Mobile Developer to support a project in the Advertising domain for one of Poland’s leading e-commerce platforms. The engineer will work within a team responsible for the technological layer of ad delivery in a large-scale mobile application. You will contribute to building and optimizing advertising components in a performance-critical environment, balancing monetization goals with excellent user experience. This includes ensuring that advertising scripts and integrations do not negatively impact application performance (e.g., blocking the main thread). We are looking for a hybrid-minded developer who understands both native mobile development and web-based ad technologies—especially JavaScript execution within WebView contexts—while maintaining a strong foundation in the native Android stack.   Expected competences and knowledge • 3+ years of commercial experience in native Android development (Kotlin) • Strong understanding of mobile application architecture patterns (e.g., MVVM, MVI, Clean Architecture) • Hands-on experience with Android WebView, including native-to-web communication • Solid understanding of JavaScript, HTML, and CSS • Experience with REST APIs and asynchronous programming • Ability to write unit and integration tests • Strong understanding of software engineering principles, data structures, and algorithms • Proactive problem-solving mindset and passion for building high-quality user experiences (UX) • Nice to have: Experience with high-traffic mobile applications • Knowledge of RxJava/RxKotlin, Coroutines, or Jetpack Compose • Familiarity with A/B testing • Open-source contributions or active GitHub profile • Experience in Agile/Scrum environments   Technologies you'll work with • Kotlin (Android) • JavaScript • HTML / CSS • Android WebView • REST APIs • Git • Jetpack Compose • Coroutines / RxJava   Client – why choose this particular client from the Jit portfolio? Our Client dominates the Polish e-commerce arena as the market leader since 1999. With a user base of over 20 million and growing, this well-established platform is at the forefront of e-commerce, constantly striving for growth through market expansion and investment. As a major player in technology, our Client boasts a talented IT team of over 1,000 employees who focus on developing their own cutting-edge technologies.  Jit Team has had a successful partnership with our Client since spring 2021, with multiple software development teams dedicated to our Client's platforms. These teams operate autonomously, designing platform components through micro-services.  Working with our Client offers a chance to contribute to a solution used by millions on a daily basis and to tackle the challenge of delivering software at a massive scale, where even a single second of delay can have a significant impact. This project provides a unique opportunity to work with state-of-the-art technologies and tools, making it a rare and valuable experience.    About Jit Team The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme. Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.