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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on delivering AI/ML solutions for Credit & Lending for corporate and institutional clients at a global bank. Required technologies include Python, ML/AI ecosystem, LLMs with fine-tuning, RAG and vector databases, KV stores (Redis), relational DBs and Pub/Sub. Responsibilities cover designing and delivering production-grade solutions, owning engineering for major AI flagship projects, implementing RAG and agentic architectures, writing high-quality testable code, and collaborating with stakeholders while shaping AI best practices. Minimum 5 years of experience, hands-on with Azure or GCP, containers, Kubernetes, CI/CD and TDD/BDD. Residency in Poland is required and occasional on-site visits to Kraków (~4x/month).
from: 21 October 2026
to: 20 November 2026
salary not specifiedB2B contract (full-time)
salary not specifiedcontract of employment
Offer parameters
level:senior
working mode:hybrid • full office
Katowice, Silesian
Katowice, SilesianView on map
Requirements
Expected technologies
Python
LLM
RAG
Agentic AI
AI/ML
Vector Databases
CI/CD
Azure/GCP
Prompt Engineering
Kubernetes
Optional technologies
Java
Our 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), and 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
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
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.
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
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.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
Senior AI Engineer (f/m/x)
I apply to:
Sii Sp. z o.o.
Katowice, Silesian
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