Prompt Engineer

Make this the place where you grow. As a global leader in business and technology innovation, we work with top organizations worldwide to deliver solutions that create meaningful impact. With 190,000+ professionals across 70+ countries, we blend deep expertise with a culture that values learning, curiosity, and collaboration. NTT DATA Belgium is implementing the project "Support for Programme Management and Implementation of Information Systems for External Relations DGs", with Particip GmbH. The overall objective of the contract is to deliver and make operational required information systems addressing gaps, supporting the DG INTPA, DG ENEST, DG MENA, FPI and EC strategies as well as engaging in a business transformation, starting with the harmonisation/simplification of business processes. The Prompt Engineer will support the business owner in the design, development, testing, and optimisation of generative AI solutions by translating business needs into effective prompt-based workflows and AI-assisted processes. The role will contribute to prompt engineering, quality assurance, user support, capacity building, and the adoption of AI-enabled tools, while ensuring alignment with responsible AI principles, data governance requirements, and organisational objectives. The role will also provide business-oriented support to digital teams and service providers, particularly in the areas of AI output evaluation, workflow design, knowledge management, user guidance, and continuous improvement of AI-driven services. Your role: Design, test, refine, and maintain prompts, prompt libraries, templates, and prompt chains for generative AI tools. Translate business or operational needs into prompt-based workflows, including defining use cases, expected outputs, guardrails, and human review points. Evaluate AI outputs for relevance, consistency, completeness, bias, hallucination risk, and usability, and adjust prompts accordingly. Collaborate with subject-matter experts, digital teams, and service providers to improve output quality and ensure contextual accuracy. Prepare user guidance, standard operating procedures, prompt documentation, and training materials. Support the rollout of AI-enabled solutions through testing, feedback collection, user support, and continuous improvement. Contribute to responsible AI governance by embedding safeguards related to privacy, confidentiality, transparency, safety, and human oversight. Monitor developments in generative AI, prompt engineering methods, and relevant EU digital and AI policy frameworks Maintain and update the AI website and communication channels, and support the publication and dissemination of news, updates, communication materials, and key information to relevant audiences. Close coordination with Team Leaders within the Sector. Any other tasks identified during the project implementation in line with the project needs.

Your profile
must have: Qualifications and

skills:
Master degree or equivalent diploma in a field linked to the assignment OR bachelor level degree in the same field plus equivalent professional experience of minimum four years. Fluency in English for oral and written communication as well as comprehension (C1 level). Fluency in French will be considered an asset. General professional

experience:
At least 4 years of professional experience in a similar field. Previous experience in business analysis and/or in project and/or operational management. Previous experience in international cooperation. Specific professional

experience:
Proven experience in prompt design, testing, and optimisation for large language models and generative AI systems. Experience in designing AI-assisted workflows for tasks such as drafting, summarisation, question-answering, document analysis, or knowledge retrieval. Understanding of responsible and human-centric AI principles, including transparency, safety, non-discrimination, privacy, and respect for fundamental rights. Familiarity with data governance, confidentiality requirements, and secure handling of sensitive information. Experience in evaluating AI performance through structured testing, benchmarking, and iterative refinement. Ability to work in institutional, public-sector, donor-funded, or regulated environments where traceability and accountability are important. Experience in capacity building, user training, or supporting organisational uptake of digital tools is highly desirable Prompt engineering certifications such as: Google Cloud Professional Machine Learning Engineer, AWS Machine Learning Specialty, DeepLearning.
AI Generative AI with LLMs, Databricks Generative AI Engineer Associate, Microsoft Azure AI Engineer Associate, or equivalent are required. Please note that only candidates with a Belgian work permit or European working rights can be considered for this position. Category: Medium Expert Dedication: 100% Start date: at earliest possible time Duration: TBD Remuneration: Commensurate with the position and experience. Type of contract: Freelance Location of assignment: Brussels, Belgium

How to apply
Please send an up-to-date copy of your CV to Karin Valverde at karin.valverde@nttdata.com and Effrosyni Papantoniou at effrosyni.papantoniou@nttdata.com.