Senior AI/ML Backend Engineer – Large Language Models & RAG

Project overview

Ignite the Future of AI — Develop Groundbreaking Credit & Lending Solutions with Large Language Models!

Kraków-based opportunity with hybrid work model.

As a Senior AI/ML Backend Engineer, you will be working for our client, a leader in financial technology, dedicated to transforming Credit & Lending services through innovative AI-driven applications. You will contribute to building sophisticated, scalable solutions leveraging Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and cloud technologies, driving impactful change in the financial industry. Join us in shaping the future of intelligent finance.

Responsibilities

You're ideal for this role if you have:

• Design, test, and optimize prompts for LLMs to deliver high-quality, reliable results for Credit & Lending use cases
• Develop and implement advanced solutions using RAG and vector databases to extract insights from complex financial data
• Participate in the full lifecycle of AI solutions — from problem discovery and prototyping to deployment in production
• Apply best practices in AI to ensure fairness, transparency, and accountability across all models and applications
• Collaborate with cross-functional teams to align technical efforts with strategic business objectives
• Write and maintain high-quality, reusable, and testable code
• Utilize cloud platforms (Azure, GCP) for deployment, scaling, and management of AI models
• Co-author solution architectures and maintain products post-deployment
• 3+ years of experience in Python and Java development in an AI or ML environment
• Hands-on experience with FastAPI, LangChain, Spring, and data containers
• Strong knowledge of SQL (PostgreSQL), vector databases, and key-value stores (Redis)
• Understanding of Microservices architecture, API design, and concurrency models
• Practical experience with Azure and GCP cloud platforms, containers, Kubernetes, and CI/CD tools (Jenkins, Azure DevOps, GCP Cloud Build)
• Proven background in TDD and BDD methodologies
• Deep understanding of LLM architectures, RAG, Prompt Engineering, and Agentic architecture
• Knowledge of machine learning, NLP, deep learning, and AI experimentation with LLMs
• Excellent communication and presentation skills in English, capable of explaining complex solutions to business stakeholders

Nice to have

Language Required for the role:

Eligibility to work in Europe:

Only candidates with an existing legal right to work in the European Union will be considered for this role.

#MAKEYourCareerBETTER

Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

• Certifications in cloud platforms or AI/ML techniques
• Experience working in financial services or credit lending sectors
• Fluent English

Project details

• Start: flexible
• Remote: hybrid
• Location: Krakow, PL