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

Technologies we use

Expected

• Python
• Java
• FastAPI
• LangChain
• Spring Framework
• SQL
• PostgreSQL
• Redis
• Kubernetes
• Jenkins
• Azure DevOps
• Google Cloud Platform
• T-SQL

Optional

• Microsoft Azure
• Google Cloud Platform

About the project

Unleash innovation in AI — shape the future of Credit & Lending solutions!

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, developing cutting-edge AI-driven applications for Credit & Lending fields. You will contribute to building sophisticated models leveraging Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and cloud solutions, driving impactful innovations in financial services.

This is how we organize our work

This is how we work

• you develop several projects simultaneously
• you have influence on the technological solutions applied
• you focus on product development

Team members

• backend developer
• technical leader
• devOps
• product owner
• project manager

Your responsibilities

• Design, test, and optimize prompts for LLMs to ensure high-quality outputs for Credit & Lending use cases.
• Develop and implement 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 and scaling.
• Apply AI best practices to promote fairness, transparency, and accountability across models and applications.
• Collaborate with cross-functional teams to align technical efforts with strategic business goals.
• Write and maintain high-quality, reusable, and testable code utilizing cloud platforms (Azure, GCP).
• Co-author solutions architecture and maintain products in production environments.

Our requirements

• 3+ years of experience in Python and Java development.
• Proficiency with frameworks like FastAPI, LangChain, and Spring.
• Strong knowledge of SQL (PostgreSQL), Vector Databases, and KV stores such as Redis.
• Experience with Microservices architecture, API design, Kubernetes, CI/CD tools (Jenkins, Azure DevOps, GCP Cloud Build).
• Practical expertise in TDD, BDD, and working with LLM architectures in domain-specific data.
• Knowledge of RAG, Prompt Engineering, and Agentic architectures.
• Background in machine learning, deep learning, NLP, and experimenting with LLMs for AI solutions.
• Fluent English communication skills, with the ability to present technical solutions clearly to business stakeholders.
• Eligibility to work in Europe: Only candidates with an existing legal right to work in the European Union will be considered for this role.

Optional

• Certifications or experience in cloud infrastructure, microservices, or advanced NLP techniques.

What we offer

• Stable and long-term cooperation with very good conditions
• Enhance your skills and develop your expertise in the financial industry
• Work on the most strategic projects available in the market
• Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years
• Participate in Social Events, training, and work in an international environment
• Access to attractive Medical Package
• Access to Multisport Program
• Access to Pluralsight
• Flexible hours

This is how we work on a project

• BDD
• TDD
• Continuous Deployment
• Continuous Integration
• test automation

Benefits

• access to +100 projects
• access to Pluralsight
• sharing the costs of sports activities
• private medical care
• flexible working time
• fruits
• integration events
• corporate gym
• saving & investment scheme
• no dress code
• coffee / tea
• drinks
• christmas gifts
• birthday celebration
• sharing the costs of a streaming platform subscription

Recruitment stages

• online interview
• online interview

#GETREADY to meet with us!

ITDS Business Consultants is involved in many various, innovative and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people.

We would like to meet you. If you are interested please apply and attach your CV in English or Polish, including a statement that you agree to our processing and storing of your personal data.

ITDS’s Whistleblower Procedure

📌 You can report violations in accordance with ITDS’s Whistleblower Procedure available here: https://itds.pl/wp-content/uploads/2025/03/INFORMATION-ON-PROCEDURE-FOR-REPORTING-BREACHES-AND-PROTECTION-OF-WHISTLEBLOWERS-AT-ITDS-POLSKA.pdf

ITDS Polska Sp. z o.o.

ITDS supports financial service providers to take the next steps.

We identify what’s possible, every day. Opportunities in the areas of technology, organization, and digitization.

We see where banks, insurers, payment companies, or fintech can go and how they can get there.

That’s why we want to stimulate you to ramp up your ambition. Forget what you perceive as restraints and step towards the new reality.

ITDS in Poland - Pure player in new Technologies & Financial Industry

+300 IT implementation professionals

+20 clients in the Banking, Insurance, Payment & Fintech Industry

ITDS excels in digital strategy delivery and implementation of best-of-breed lending solutions. ITDS has delivered successful strategic projects throughout Europe since 1998. We combine the experience we’ve accumulated with in-depth knowledge of technologies, business processes, and EU legislation to unlock new business opportunities.

This is how we work