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

Type of contract: Employment contract  Salary range: 14600-22300 PLN gross What will you do? You will build production-grade AI and GenAI solutions using Python, contributing to a large-scale enterprise technology transformation. You will work on LLM-based capabilities, RAG solutions, agentic workflows and integrations with an existing Java-based ecosystem while ensuring high standards of security, testing, governance and operational resilience. 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 Contribute to technical design and architecture decisions 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 and resolve technical risks, dependencies and delivery blockers Support releases, production readiness and incident response Collaborate with architects, Tech Leads, QA, platform and operations teams Contribute to engineering standards and continuous improvement Your skills 4+ years of professional software engineering experience in Python and Java Hands-on experience building AI and GenAI solutions Practical knowledge of LLM capabilities, limitations and safe usage patterns 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 Experience making pragmatic technical decisions in complex enterprise environments Strong understanding of secure software development and operational resilience Nice to have Previous strong hands-on Java and Spring Boot development experience Experience delivering solutions in regulated financial services Experience with…