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Selected role

Senior AI Engineer (LLMs, Prompt Engineering)

EPAM Systems Kraków, ML, PL

Senior Full-time

We are seeking a Senior AI Engineer to join a fast-paced and innovative team focused on developing and optimizing generative AI solutions, leveraging cutting-edge technologies like LLMs and prompt engineering. In this role, you will work closely with cross-functional experts to design solutions for document understanding and data extraction, driving impactful results in a cloud-native environment.

*This role offers a hybrid model, with 3 days per week working from the client's office in Krakow, Poland.

Responsibilities**

Design and optimize advanced prompts tailored for document understanding and data extraction use cases
Collaborate with stakeholders to deeply understand document structures, semantics, and key-value relationships
Create PoCs (Proofs of Concept) using Python to validate prompt effectiveness and iterate quickly
Maintain a prompt library, ensuring quality, reusability, and compliance with security and privacy guidelines
Perform prompt validation, stress testing, and failover scenario modeling for different LLMs
Analyze LLM output quality, fine-tune prompts accordingly, and propose model-specific prompt strategies
Work with ML engineers on potential fine-tuning initiatives to improve model accuracy on specific document domains
Document best practices, prompt strategies, and experiment results in a structured and maintainable format
Identify and mitigate risks related to prompt injection, hallucination, or other LLM-specific vulnerabilities

Requirements

3+ years of experience in AI Engineering, with proven expertise in designing and deploying prompts in real-world applications (including 2+ LLM production projects)
Excellent understanding of prompt structures and contexts
Proficiency in Python, including experience with LLM APIs, prompt engineering frameworks, and data manipulation tools like Pandas
Experience with at least one fine-tuning or retrieval-augmented generation (RAG) pipeline implementation
Familiarity with prompt evaluation tools, metrics like BLEU and ROUGE, and human-in-the-loop validation
Understanding of LLM-related security concerns such as prompt injection, output filtering, API limitations, and structured output
Excellent communication skills and ability to translate complex document requirements into actionable prompt logic
Strong analytical mindset with attention to both high-level design and low-level output consistency
English level of minimum B2 (Upper-Intermediate) for effective communication

Nice to have

Experience with vector databases and retrieval-augmented generation
Exposure to tools like LangChain, LlamaIndex, or similar
Prior work with OCR, NLP, or intelligent document processing (IDP) pipelines

We offer

We gather like-minded people:
- Engineering community of industry professionals
- Friendly team and enjoyable working environment
- Flexible schedule and opportunity to work remotely within Poland
- Chance to work abroad for up to 60 days annually
- Business-driven relocation opportunities
We provide growth opportunities:
- Outstanding career roadmap
- Leadership development, career advising, soft skills, and well-being programs
- Certification (GCP, Azure, AWS)
- Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru
- English classes
We cover it all:
- Stable income (Employment Contract or B2B)
- Participation in the Employee Stock Purchase Plan
- Benefits package (health insurance, multisport, shopping vouchers)
- Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more
- Referral bonuses
- Corporate, social and well-being events
Please, note:
- The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview.
- We will reach out to selected candidates exclusively.

EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

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