Senior AI Engineer — Production ML for Global Banking

Sii Poland; Wrocław; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

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

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 on innovative AI/ML solutions transforming Credit & Lending for corporate clients, contributing to production-grade systems and high-quality code.

Occasional travel to Kraków (~4 times a month) is expected. The role emphasizes collaboration, modern AI techniques, and continuous learning in a fast-paced environment with opportunities to

Qualifications

• Minimum 5 years of experience in software or ML engineering.
• Deep Python and ML ecosystem knowledge.
• Relational databases, vector databases, KV stores (Redis), Pub/Sub.
• Strong microservices, observability, API design and concurrency.
• Expert in LLM architectures and fine-tuning on domain data.
• Hands-on RAG, prompt engineering, agentic architectures.
• ML, deep learning, NLP fundamentals.
• Experience with Azure or GCP, containers, Kubernetes, CI/CD tools.
• Experience with TDD and BDD.
• Excellent English presentation and communication skills.
• Residence in Poland is required.

Responsibilities

• Write and maintain high-quality, testable, reusable code.
• Lead design of AI/ML solutions that are scalable and aligned with platform vision.
• Own engineering execution for major AI projects from design to production deployment.
• Co-author and promote coding standards and AI best practices for fairness and transparency.
• Co-drive technical strategy by prototyping new technologies (RAG, LLM opt, agentic architectures).
• Collaborate with stakeholders across AI Programmes to translate requirements into tech solutions.

Skills

Python

ML engineering

LLM architectures

RAG

Vector databases

Redis Pub/Sub

Microservices

API design

Concurrency

Azure/GCP

Containers

Kubernetes

CI/CD

TDD/BDD

English

Residence in Poland

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 on innovative AI/ML solutions transforming Credit & Lending for corporate clients, contributing to production-grade systems and high-quality code.

Occasional travel to Kraków (~4 times a month) is expected. The role emphasizes collaboration, modern AI techniques, and continuous learning in a fast-paced environment with opportunities to