Senior AI Engineer: Lead Production ML in Banking (RAG/LLM)

Sii Poland; Wrocław; On-site; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Great Place to Work

Centre of internal trainings

Profit sharing

Medical care

Regular integration events

Job summary

Sii Poland is seeking an experienced AI/ML Engineer to join a long-term project for a global leader in banking. You will work with an international team to develop scalable AI/ML solutions for Credit & Lending.

The role involves production deployment, RAG and vector databases, and collaboration with stakeholders across locations. Occasional travel to Kraków (about 4 times per month) is expected. Fluency in English is essential.

Qualifications

• 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.

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

Skills

Python

LLM architectures

NLP

RAG techniques

Vector databases

English communication

Tools

Azure

GCP

Kubernetes

CI/CD tools

Redis

Job description

Sii Poland is seeking an experienced AI/ML Engineer to join a long-term project for a global leader in banking. You will work with an international team to develop scalable AI/ML solutions for Credit & Lending.

The role involves production deployment, RAG and vector databases, and collaboration with stakeholders across locations. Occasional travel to Kraków (about 4 times per month) is expected. Fluency in English is essential.