Expert Backend Engineer (Python&Java) with AI/ML skills

Type of contract: Employment  contract  Salary range: 17400-26700 PLN gross What will you do? You will design and develop production-grade AI and GenAI solutions built primarily in Python, contributing to a large-scale enterprise technology transformation. You will work on LLM-based capabilities, RAG solutions and agentic workflows, ensuring secure integration with an existing Java-based ecosystem. You will contribute to architecture discussions and help deliver scalable, secure and reliable AI solutions that meet enterprise standards. Your tasks Design and develop production-grade AI and GenAI solutions in Python Build and integrate LLM-based applications, RAG pipelines and agentic workflows Develop secure APIs, microservices and integration components Integrate Python-based solutions with existing Java services and enterprise platforms Evaluate and validate AI-generated outputs using measurable quality criteria Apply human-in-the-loop controls, traceability and auditability practices Contribute to solution design and architecture discussions Develop unit, integration, contract and automated evaluation tests Follow secure coding standards and AI governance requirements Contribute to CI/CD pipelines, quality gates and automated security checks Implement logging, monitoring, metrics and tracing Identify technical risks, dependencies and delivery blockers and propose mitigation approaches Support releases, production readiness and incident resolution Collaborate with architects, Tech Leads, QA, platform and operations teams Contribute to engineering standards and continuous improvement initiatives Your skills 5+ years of professional software engineering experience with strong expertise in Python Hands-on experience building and delivering AI and GenAI solutions in production environments Practical knowledge of LLM capabilities, limitations and safe usage patterns Strong experience designing and implementing RAG solutions Experience with agentic or tool-using AI workflows Experience with prompt engineering, evaluation and validation approaches Knowledge of AI governance, security, traceability and auditability Experience developing microservices and APIs Previous commercial experience with Java and Java-based enterprise systems Ability to understand, review and occasionally modify Java code Experience with relational databases such as PostgreSQL or Oracle Knowledge of schema design, transactional integrity and performance optimization Strong unit, integration and contract testing practices Experience with CI/CD pipelines and quality gates Hands-on experience with cloud platforms (Azure preferred) Knowledge of REST, messaging and event-driven integration patterns Ability to independently design and deliver complex technical solutions in enterprise environments Strong understanding of secure software…