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 architectures

• Collaborate extensively with stakeholders across the AI Programmes, translating business requirements into technical solutions and communicating complex ideas to diverse audiences
• Develop and implement sophisticated solutions using Retrieval-Augmented Generation (RAG) and vector databases to unlock insights from complex financial data
• Requirements
• Minimum 5 years of experience in software or ML engineering
• Deep expertise in Python and its ML/AI ecosystem
• Familiarity with relational databases, vector databases, KV stores (Redis), Pub/SubStrong command of microservices architecture, observability, API design, and concurrency models
• Expert-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 NLP
• Proficiency with Azure or GCP, containers, Kubernetes, and CI/CD tools, e.g., Jenkins, Azure DevOps, GCP Cloud Build
• Practical experience in TDD and BDD
• Exceptional presentation and communication skills in English
• Residing in Poland required
• Nice-to-have requirements
• Leadership or architectural experience
• Familiarity 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!