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 tasks

• 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

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/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

Nice-to-have requirements

• 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

• 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!