Responsibilities Develop and maintain backend services using Kotlin Collaborate with cross-functional teams to design and implement scalable solutions Integrate applications with AWS cloud services Participate in code reviews and contribute to continuous improvement initiatives Benefits Motivizer Benefits Platform to choose and manage all your benefits in one place. You receive a budget (550 PLN monthly). You can choose a medical care package, meal tickets, sports cards (we have Multisport and on preferential terms, we have membership cards to one of the most popular Gyms), cinema tickets, shop vouchers, discounts and many more. Language Courses – you'll have access to a multi-language learning platform enabling you to practice your language skills and learn new ones! Regular and systematic further training opportunities - both internally and from external providers. We support your ongoing learning and development. Cooperation within an internal community is our everyday reality. We have networking events, coding challenges, and company parties for different occasions. Qualifications Successfully completed studies in computer science or a comparable course of study At least 2 years of experience working with Kotlin Basic understanding of AWS (e.g., S3, EC2, Lambda) Strong problem-solving skills and attention to detail Very good English and Polish skills Availability to work in a hybrid mode or remotely with at least 2 visits in the Katowice office per month (Nice to have) Experience or familiarity with automotive systems About Concept ReplyConcept Reply is an IoT software developer specializing in the research, development and validation of innovative solutions and supports its customers in the automotive, manufacturing, smart infrastructure and other industries in all matters relating to the Internet of Things (IoT) and cloud computing. The goal is to offer end-to-end solutions along the entire value chain: from the definition of an IoT strategy, through testing and quality assurance, to the implementation of a concrete solution.