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

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

Job no. 260615-3FYFN

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care