Senior AI Engineer (f/m/x)

Expected, Python, LLM, RAG, Agentic AI, Vector Databases, Prompt Engineering, Kubernetes, Microsoft Azure, Google Cloud Platform

Optional, Java

About the project, 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 responsibilities, Write and maintain exemplary, high-quality, testable, and reusable code, Lead the design of AI/ML solutions, ensuring they are scalable, robust, and aligned with the platform's vision, Own the engineering execution for significant parts of our AI flagship projects, from technical design through to production deployment, Co-author and champion coding standards and AI best practices to ensure fairness, transparency, and accountability across our models, Co-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

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/Sub, Strong 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 data, Hands-on mastery of Retrieval-Augmented Generation (RAG), advanced prompt engineering, and designing agentic architectures, In-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

Optional, Leadership or architectural experience, Familiarity with Java for occasional middleware and integration tasks

What 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 – you can change them thanks to Job Changer application, 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

This is how we work on a project, BDD, TDD, Continuous Deployment, Continuous Integration

Recruitment stages, Send your CV, Talk to us about your expectations, Learn more about our projects and choose the best, Start your adventure with Sii!

Sii Sp. z o.o., Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment., , Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.

This is how we work,