AI Engineer (M/F/X)

What you will do

• Design, develop, and test AI-powered applications, from proof of concept to production-ready solutions
• Build and integrate LLM-based solutions, including use cases around RAG, document analysis, and text comparison, while connecting AI components to client systems and data sources
• Develop back-end services, APIs, and user-facing interfaces or dashboards that make AI solutions accessible and usable for business teams
• Design and run evaluation frameworks for AI outputs, including test sets, metrics, baselines, and traceability, especially in regulated environments
• Collaborate with business teams, data scientists, and engineers across client organizations and the Reply network to translate business needs into robust technical solutions
• Contribute to internal accelerators and help grow the AI practice in Luxembourg through technical input, knowledge sharing, and continuous improvement

Benefits

• A key role within a newly created AI team, with strong involvement in technical decisions alongside the team lead
• Hands-on AI projects for leading financial services clients, with real business impact
• Continuous learning opportunities through internal knowledge sharing and external certifications
• Access to the wider Reply network of AI and technology specialists across Europe
• A collaborative and non-hierarchical organization that promotes openness, teamwork, and knowledge sharing within the firm and the Reply Group
• A competitive compensation package, including a strong base salary and performance-based bonuses

Qualifications

• 2 to 4 years of experience in software development or AI, including at least one AI or LLM-based application used by real users
• Degree in Computer Science, Software Engineering, Data Science, Artificial Intelligence, or another relevant field
• Strong skills in Python, with solid knowledge of JavaScript/TypeScript and web fundamentals
• Experience with LLM applications, including prompt design, retrieval strategies, evaluation, and production-oriented safeguards
• Good knowledge of Docker, one cloud platform (Azure, AWS, or GCP), as well as SQL, REST APIs, and Git workflows
• Professional fluency in English and French, combined with an analytical, autonomous, and curious mindset

About Reply

Reply specialises in the design and implementation of solutions based on new communication channels and digital media. As a network of highly specialised companies, Reply defines and develops business models enabled by the new models of AI, big data, cloud computing, digital media and the internet of things. Reply delivers consulting, system integration and digital services to organisations across the telecom and media; industry and services; banking and insurance; and public sectors. www.reply.com