Senior AI Engineer (f/m/x)

We are looking for an experienced AI/ML Engineer to join a long-term project delivered for a global leader in the banking sector. As part of a highly skilled international team, you will contribute to the development of innovative AI and Machine Learning solutions, transforming the Credit & Lending area for corporate and institutional clients worldwide. This role offers the opportunity to work in a stable yet fast-paced environment, where collaboration, innovation, and continuous learning are strongly valued. You will cooperate closely with business stakeholders and engineers across multiple global locations to deliver impactful, production-grade solutions. If you are passionate about applying modern AI technologies to solve complex real-world challenges, this opportunity may be the right fit for you.The role requires occasional visits to the client’s office in Kraków, approximately 4 times per month.Your tasksWrite and maintain exemplary, high-quality, testable, and reusable codeLead the design of AI/ML solutions, ensuring they are scalable, robust, and aligned with the platform's visionOwn the engineering execution for significant parts of our AI flagship projects, from technical design through to production deploymentCo-author and champion coding standards and AI best practices to ensure fairness, transparency, and accountability across our modelsCo-drive technical strategy by evaluating and prototyping new technologies, such as advanced RAG techniques, LLM optimization, and agentic architecturesCollaborate extensively with stakeholders across the AI Programmes, translating business requirements into technical solutions and communicating complex ideas to diverse audiencesDevelop and implement sophisticated solutions using Retrieval-Augmented Generation (RAG) and vector databases to unlock insights from complex financial dataRequirementsMinimum 5 years of experience in software or ML engineeringDeep expertise in Python and its ML/AI ecosystemFamiliarity with relational databases, vector databases, KV stores (Redis), Pub/SubStrong command of microservices architecture, observability, API design, and concurrency modelsExpert-level understanding of LLM architectures and extensive experience fine-tuning models on domain-specific dataHands-on mastery of Retrieval-Augmented Generation (RAG), advanced prompt engineering, and designing agentic architecturesIn-depth knowledge of machine learning, deep learning, and NLPProficiency with Azure or GCP, containers, Kubernetes, and CI/CD tools, e.g., Jenkins, Azure DevOps, GCP Cloud BuildPractical experience in TDD and BDDExceptional presentation and communication skills in EnglishResiding in Poland requiredNice-to-have requirementsLeadership or architectural experienceFamiliarity with Java for occasional middleware and integration tasksWhat we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People If you want to work on systems with high operational significance — apply now!