AI / ML Engineer (Mid / Senior) – LLM, RAG, Python
📍 Kraków, Poland | Hybrid model (2 days per week in the office)
Rate: 180-220PLN netto
For our client, we are looking for AI / ML Engineers (Mid and Senior level) to join a small, highly skilled engineering team building cutting-edge AI solutions for complex financial data and decision-making systems.
This is an exciting opportunity to work on flagship Artificial Intelligence and Machine Learning initiatives, leveraging Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and modern ML techniques to solve real-world business challenges within the Credit & Lending domain.
You will be involved in the full lifecycle of AI solutions—from discovery and experimentation through design, development, deployment, and optimization.
Key Responsibilities
As an AI / ML Engineer, you will:
- Design, test, and optimize prompts for Large Language Models (LLMs)
- Build intelligent solutions using Retrieval-Augmented Generation (RAG) and vector databases
- Develop scalable services and APIs powering AI-driven applications
- Work across the full AI solution lifecycle, from ideation and prototyping to production deployment
- Collaborate closely with engineering, product, and business teams to translate complex business needs into technical solutions
- Write clean, maintainable, and well-tested code
- Deploy and scale AI workloads using cloud platforms (Azure or GCP)
- Apply AI best practices to ensure fairness, transparency, reliability, and performance of ML systems
Additional Responsibilities for Senior Engineers
- Lead architecture and technical design decisions
- Drive the technical direction of AI initiatives
- Mentor and support other engineers within the team
- Evaluate, prototype, and introduce new AI technologies and approaches
- Contribute to engineering best practices and standards
Requirements
Essential Skills and Experience
- Strong software development experience in Python, particularly within the AI/ML ecosystem
- Experience with frameworks such as FastAPI, LangChain, or similar
- Knowledge of PostgreSQL and vector databases
- Experience designing microservices, APIs, observability solutions, and concurrent systems
- Hands-on experience with Azure or GCP
- Practical knowledge of containers, Kubernetes, and CI/CD practices
- Understanding of LLM architectures and working with domain-specific datasets
- Experience with RAG, prompt engineering, or agent-based AI architectures
- Solid understanding of Machine Learning, NLP, and Deep Learning concepts
- Experience working with TDD and/or BDD
- Strong English communication skills and the ability to explain technical concepts to non-technical stakeholders
- Familiarity with Java will be considered an advantage
Additional Requirements for Senior Candidates
- Experience leading technical projects and initiatives
- Proven track record in architecture and technology decision-making
- Mentoring and coaching engineers
- Driving innovation and experimentation in AI-powered systems
What We Offer
- Opportunity to work on advanced AI and LLM solutions addressing real business challenges
- Significant influence over architecture and AI strategy
- Collaboration within a highly skilled, high-impact engineering team
- Exposure to modern technologies across LLM, RAG, Machine Learning, and cloud infrastructure
- Stable yet innovative environment where AI solutions are delivered into production
- Hybrid working model with 2 days per week in the Kraków office
- The chance to design, build, and scale AI systems that create measurable business value
If you are passionate about building production-grade AI solutions—not just experimenting with models—and want to work on systems that make a real impact, we would love to hear from you.