Senior Java Developer

Company Description Our mission as an IT services company is to deliver the best solutions to our clients worldwide. We achieve this by analyzing our clients' needs and matching them with the skills and aspirations of our employees. Therefore, one of our main motivations is to provide every Employee and Consultant with a satisfying experience. Joining us means being part of a community with diverse personalities. Start your adventure with act digital! Project Description We are looking for a Senior Java Developer (AI). This role is for someone who combines very good Java knowledge with practical experience in using LLM models and AI tools in a production environment. You will develop backend applications and support teams in implementing modern solutions based on artificial intelligence. Your Tasks Development of backend applications in Java and Spring Boot technology. Integration of AI solutions with existing systems. Implementation of AI tools supporting the software development process (including GitHub Copilot, Claude Code). Design and development of agent solutions based on LLM models. Conducting technical workshops and supporting development teams in using AI. Collaboration with architects and developers in designing modern solutions. Requirements Minimum 5 years of experience in Java and Spring Boot programming. Minimum 1 year of practical experience with LLM models in a production environment. Experience with Spring AI or LangChain4j. Knowledge of LLM API, embeddings, and vector databases. Experience in designing agent architectures (e.g., ReAct, MCP). Knowledge of issues related to AI Observability and Specification-Driven Development. Experience in conducting technical workshops and sharing knowledge. Higher education in a relevant field (STEM – Computer Science, Mathematics, Physics, or related). Nice to have Knowledge of Angular. Experience with Python or TypeScript. Experience with Enterprise LLM Integrations. Additional Information Work model: Remote (office visits max 2 times per month Poznań/Warsaw/Wrocław) Type of cooperation: B2B Rate: up to 190 PLN/H Net + VAT We Offer Access to local and international projects – clients from France, Germany, Portugal, Great Britain, and the Benelux countries. Support in professional development - training, technical certifications, participation in conferences, foreign language courses, and soft skills training subsidized up to PLN 2,000. Flexibility - you choose the form of cooperation: employment contract or business-to-business contract. Bonus for recommending candidates up to PLN 6,000. Fully paid Medicover card. Multisport card. Regular integration events and gifts. Mobility Program. Long-term cooperation. If You applied for this position the Controller of your personal will be ACT DIGITAL POLSKA Sp. z o.o., with its registered office at Przyokopowa 31, 01-208 Warsaw. The personal data provided by you will be processed for the purpose of the recruitment process and for future recruitment processes. You have the right to access the content of your data, request their rectification, erasure, restriction of processing, the right to data portability, the right to object to the processing of your data and the right to lodge a complaint to the President of the Personal Data Protection Office.