Salary: 800 - 1200/ MD + VAT (B2B) Remote: flexible hybrid from Warszawa/ Gdynia   Why choose this offer? Working in a team you can always count on we have on board top-class specialists and experts in their areas of expertise A high degree of autonomy in terms of organizing your teams work - we encourage you to develop continuously and try out new things Work on a consumer-focused mobile project improving category experience and user interactions, directly impacting business results   Project As a Mobile Software Engineer, you will be a key contributor to the development of new features and improvements for our mobile applications. You will work closely with product owners, designers, and other engineers to translate user needs into robust, high-performance mobile experiences. This role is ideal for someone with solid experience in mobile development, a strong understanding of software engineering principles, and a desire to grow their expertise in a fast-paced e-commerce environment.   What you will be doing on this postion: Design, develop, test, and deploy features for the Allegro Android, ensuring high quality, performance, and responsiveness Collaborate with product, design, and other engineering teams to define and implement innovative solutions Participate in code reviews, contribute to technical discussions, and help maintain high code quality standards Identify and resolve performance and scalability issues Continuously improve our development processes, tools, and infrastructure Share knowledge and mentor junior engineers, contributing to the growth of the team Stay up-to-date with the latest mobile technologies and industry trends   Expected competences and knowledge 5+ years of professional experience in native Android (Kotlin) mobile application development Strong understanding of mobile application architecture patterns (e.g., MVVM, MVI, Clean Architecture) Experience with RESTful APIs, asynchronous programming, and efficient data handling Proficiency in writing unit and integration tests Familiarity with version control systems (e.g., Git) Solid understanding of software engineering principles, data structures, and algorithms Experience with continuous integration and continuous delivery (CI/CD) pipelines Good communication skills in English, both written and spoken A proactive approach to problem-solving and a passion for creating excellent user experiences    Nice to have: Experience with large-scale, high-traffic mobile applications Knowledge of reactive programming (e.g., RxJava/RxKotlin, Combine) Familiarity with Jetpack Compose and Coroutines Experience with A/B testing frameworks Contributions to open-source projects or a strong GitHub profile Experience working in an Agile/Scrum environment   Technologies you'll work with Kotlin (native Android development) RESTful APIs MVVM, MVI, Clean Architecture (mobile architecture patterns) Unit and integration testing Git (version control) CI/CD pipelines   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.