Mid Prompt Engineering Specialist

🏒 InventYOU AB · all 4 jobs
πŸ“ Greece
πŸ“… Posted Sep 28, 2026 Β· via WorkableBoard
🏷 Remote
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We are looking for a Prompt Engineering Specialist to design, optimize, evaluate, and maintain prompts for Large Language Model (LLM) applications .

In this role, you will work with modern LLM platforms and orchestration frameworks, collaborating with Business Analysts, domain experts, and technical teams to translate functional requirements into effective and reliable prompt strategies.

Key Responsibilities
- Design, test, and iteratively refine prompts for LLM-based applications
- Develop and maintain prompt libraries, templates, and reusable prompt components
- Evaluate and benchmark prompt performance across different LLM platforms and model versions
- Translate functional and business requirements into effective prompt strategies
- Apply advanced prompt-engineering techniques, including zero-shot, few-shot, RAG, role prompting, and structured output prompting
- Identify and mitigate risks such as hallucinations, prompt injection, data leakage, bias, and inconsistent outputs
- Define and document prompt design decisions, evaluation criteria, and version history
- Support testing, Quality Assurance, and User Acceptance Testing activities for LLM solutions
- Develop automation and testing pipelines for prompt evaluation
- Integrate prompts and LLM capabilities through APIs
- Provide guidance and knowledge transfer to technical and non-technical stakeholders on effective LLM interaction patterns

- Minimum 2 years of professional experience working with and optimizing LLMs and/or prompt development and engineering
- Bachelor’s degree in Computer Science, Artificial Intelligence, Data Science, IT , or a closely related field; alternatively, a non-university degree with at least 5 years of IT experience
- Hands-on experience with major LLM platforms and APIs , such as:
- OpenAI / GPT
- Anthropic / Claude
- Mistral
- Meta LLaMA
- Equivalent commercial or open-source models

- Strong knowledge of prompt design techniques, including zero-shot, few-shot, RAG, role prompting, and structured output prompting
- Experience with LLM orchestration frameworks
- Programming skills for prompt automation, testing pipelines, and API integration
- Experience with methodologies for evaluating LLM outputs, including human evaluation and automated metrics
- Understanding of LLM architecture and tokenization sufficient to support effective prompt-design decisions
- Understanding of common LLM risks, including hallucination, prompt injection, data leakage, and bias

You will be a great candidate for us if you
- Have a strong understanding of how different LLMs respond to prompt design and context
- Enjoy experimenting, evaluating, and systematically improving AI outputs
- Can translate business requirements into structured and reusable prompt strategies
- Have a quality-focused approach to LLM testing and evaluation
- Understand both the technical and business aspects of Generative AI solutions
- Can communicate AI concepts effectively to technical and non-technical stakeholders

Why join inventYOU
- Work on innovative Generative AI and LLM-based solutions
- Gain hands-on exposure to multiple commercial and open-source LLM platforms
- Work with modern prompt engineering, RAG, orchestration, and evaluation techniques
- Collaborate with experienced AI, technology, and business professionals
- Continue developing your expertise in LLM engineering and enterprise Generative AI

Flights + hotels

This role requires you to be in Greece. If that means relocating or flying in, it is worth checking fares before you commit to a start date.

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