Senior AI & Agentic Systems Engineer (Java)

We are looking for a Senior AI & Agentic Systems Engineer (Java) to work at the intersection of enterprise Java development and AI. The role focuses on building intelligent, autonomous systems powered by Large Language Models and agentic architectures.

This position offers a hybrid work model, combining remote work with 3 days per week from an office in Kraków, Wrocław, or Gdańsk.

Responsibilities

• Design, develop, and deploy AI-powered applications and agentic systems built on robust Java/Spring Boot backends.
• Integrate Large Language Models (LLMs) into enterprise-grade applications, ensuring reliability, scalability, and security.
• Architect and implement autonomous AI agent workflows capable of reasoning, planning, and executing multi-step tasks.
• Design and build RESTful APIs that serve as interfaces between AI components and broader application ecosystems.
• Evaluate, select, and integrate AI frameworks and tools, such as Spring AI and LangChain4J, to accelerate intelligent-feature development.
• Collaborate with data scientists, ML engineers, and product teams to translate AI concepts into production-ready solutions.
• Develop and refine prompt-engineering strategies to optimize LLM outputs for specific business use cases.
• Contribute to architectural decisions on AI system design, model orchestration, and data pipelines.
• Participate in code reviews and ensure high-quality, maintainable code across AI and backend components.
• Stay current with the AI landscape and advocate for new tools, patterns, and best practices.
• Mentor team members on AI integration patterns and agentic system development approaches.

Requirements

• Minimum 5 years of professional software-development experience with a strong Java backend focus.
• Solid hands-on experience with Spring Boot for production-grade enterprise applications.
• Proven experience designing and developing REST APIs following industry best practices.
• Experience in AI agent development or LLM integration, including applications using large language models for reasoning, content generation, or task automation.
• Experience with Spring AI or LangChain4J for AI-powered Java applications.
• Practical knowledge of prompt-engineering techniques for crafting, testing, and optimizing prompts for consistent, reliable LLM behavior.
• Working knowledge of Python for AI/ML scripting, prototyping, or integration with Python-based AI tooling.
• Experience with AWS or GCP, especially AI/ML workload services and scalable application deployment.
• Strong understanding of software-architecture principles and the ability to design systems combining traditional backend services and AI components.
• Excellent communication skills and ability to work effectively in cross-functional, international Agile teams.
• English proficiency at B2+ level, written and spoken.

Nice to have

• Experience implementing Retrieval-Augmented Generation (RAG) pipelines to ground LLM responses in domain-specific knowledge.
• Familiarity with vector databases, such as Pinecone, Weaviate, pgvector, and Chroma, for storing and querying embeddings.
• Knowledge of Model Context Protocol (MCP) for standardized communication between AI models and external tools or data sources.
• Experience with Anthropic Claude Code or similar AI-assisted development tools.
• Familiarity with Google Agent Development Kit (ADK) for building and orchestrating multi-agent systems.

We offer

• Hybrid-by-design work mode and opportunity to work remotely within Poland.
• Opportunity to work abroad for up to 60 days annually.
• Business-driven relocation opportunities.
• Career development programs, thought leadership, mentoring, soft-skills, and well-being programs.
• Certification opportunities in Anthropic, Gemini, GCP, Azure, and AWS.
• English classes.
• Stable pay.
• Participation in the Employee Stock Purchase Plan with a 15% discount.
• Benefits package, including health insurance, multisport, and shopping vouchers.
• Referral bonuses up to $2,000.
• Offices with entertainment and relaxation zones, table tennis, football, free snacks, and coffee.
• Corporate, social, and well-being events.

Benefits listed above are available to employees only.

Contractor engagement is also possible; B2B cooperation terms are agreed individually.

Only selected candidates will be contacted.