Regular Kotlin Developer

Salary: 700-960 pln/day on B2B Work mode: elastic hybrid (1 day per week from Gdynia/Warszawa/Kraków/Rzeszów)   Why choose this offer? Opportunity to work on high-complexity, AI-driven solutions Influence on engineering standards and technical best practices Contribute to the development of a leading e-commerce advertising platform Work in a cross-functional environment with Engineers, Product Managers, and Designers   Project You will join the Language Intelligence team, responsible for building and scaling intelligent solutions supporting language-driven features within the product ecosystem. The team works in a cross-functional setup, closely collaborating with Product, UX, and Business stakeholders. In this role, you will contribute to the design, development, and improvement of system components, ensuring high-quality code and reliable delivery. You will actively participate in technical discussions, support architectural decisions, and help align technical solutions with business requirements. This position offers the opportunity to work on impactful product features and contribute to the evolution of intelligent, scalable systems.   Expected competences and knowledge Min. 4 years of experience with Kotlin Basic experience and strong interest in AI-driven solutions, specifically LLM integration and Agentic Systems/Frameworks Ability to design and implement complex features and system components Strong ownership of delivered solutions (code quality, stability, scalability, observability) Experience making architectural decisions and evaluating technical trade-offs Ability to identify and manage technical risks, dependencies, and technical debt Product-oriented mindset - evaluating technical choices through user impact High level of autonomy and accountability   Nice to have Hands-on experience with Cloud environments (GCP preferred) and Kubernetes Experience working in large-scale, distributed systems Cross-team collaboration experience in complex organizational environments Experience providing technical consultancy and knowledge sharing   Responsibilities you'll have Drive the design and implementation of complex features and system components Contribute to architectural decisions and evaluate technical trade-offs Ensure high quality, scalability, stability, and observability of delivered solutions Identify and manage technical risks, dependencies, and technical debt Collaborate closely with Engineers, Product Managers, and Designers Support knowledge sharing and promote engineering best practices Contribute to AI-driven initiatives, including LLM integration and agent-based systems   Technologies you'll work with Kotlin AI LLM GCP Kubernetes   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.