Senior AI & Agentic Systems Engineer (Java)

This is a hybrid role 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 development of intelligent features.
• 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 regarding AI system design, model orchestration, and data pipelines.
• Participate in code reviews, ensuring high-quality and maintainable code across AI and backend components.
• Stay current with the rapidly evolving AI landscape and advocate for adoption of new tools, patterns, and best practices.
• Mentor team members on AI integration patterns and agentic system development approaches.

Requirements

• Minimum of 5 years of professional software development experience with a strong Java backend focus.
• Solid hands-on experience with Spring Boot for building 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 that use large language models for reasoning, content generation, or task automation.
• Experience with Spring AI or LangChain4J frameworks for AI-powered Java applications.
• Practical knowledge of prompt engineering techniques, including 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, particularly AI/ML workload services and scalable application deployment.
• Strong understanding of software architecture principles and ability to design systems combining traditional backend services with 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, including Pinecone, Weaviate, pgvector, and Chroma, for storing and querying embedding representations.
• 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 in engineering workflows.
• Familiarity with Google Agent Development Kit (ADK) for building and orchestrating multi-agent systems.

We offer

• Hybrid work model and the 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 an 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 collaboration is also available. Terms of B2B cooperation agreements are agreed individually.

Only selected candidates will be contacted.