Software Engineer (AI-centric applications)

We are strategically positioned to build value, with a global footprint across 30 countries.We are as global and local as you need us to be, with strong best-in-class pan-European technological centers and unique best-shoring capabilities. We leverage a network of high value-adding affiliates in consulting and industrial excellence, and leading partners across multiple sectors to provide you with the most comprehensive services and solutions in an ever-changing environment.

• Design and implement AI-powered applications using LLMs, RAG, and agentic workflow patterns.
• Build backend services, APIs, and integrations needed for AI-centric applications.
• Design and improve retrieval pipelines, including chunking, embeddings, vector search, hybrid search, metadata filtering, and reranking.
• Work with LLM APIs and AI orchestration frameworks to build reliable workflows.
• Implement evaluation, testing, monitoring, and observability for AI applications.
• Help define safe and practical patterns for tool use, human-in-the-loop approval, and agentic behavior.
• Collaborate with other engineers and product/business stakeholders.
• Support model and framework selection based on quality, cost, latency, maintainability, and security.
• Help troubleshoot issues such as hallucinations, poor retrieval quality, high latency, cost inefficiency, and unreliable outputs.

• You are able to speak, read and write fluently English and French or Dutch.
• Minimum 5 years of experience as Software Engineer, preferably in backend or full-stack development.
• Minimum 1 to 2 years of experience integrating LLMs or other generative AI services into software applications.
• Practical knowledge of RAG, embeddings, vector search, and retrieval quality improvement.
• Strong programming skills in Python.
• Experience with MCP, A2A, tool calling, or multi-agent workflows.
• Experience designing maintainable services with proper testing, logging, CI/CD, and deployment practices.
• Understanding of AI application evaluation, including test datasets, quality metrics, regression testing, and user feedback.
• Good understanding of cloud-native application development.
• Security-conscious mindset when working with internal or sensitive data.
• Ability to communicate technical trade-offs clearly and pragmatically.
• Ability to distinguish when AI, RAG, or agents are useful and when a simpler deterministic solution is better.
• Nice to Have
• Experience with AI frameworks such as LangGraph, LangChain, Semantic Kernel.
• Experience with observability or evaluation tools.
• Familiarity with Azure cloud environment.
• Experience with Microsoft AI ecosystem tools such as Semantic Kernel, Microsoft
• Agent Framework, Microsoft Foundry, or Microsoft 365 Agents SDK.
• Experience with .NET / C#.
• Experience with vector databases or enterprise search platforms.
• Experience working in regulated, security-sensitive, or enterprise environments.

At Expleo, we are committed to providing a competitive salary and substantial benefits offering with unique wellbeing, financial and employee recognition programs.

We pride ourselves on our diverse and inclusive culture and offer a variety of family-friendly policies and enhanced leave to help you achieve a healthy work life balance.

By providing significant learning and development opportunities, we encourage individual growth and success throughout your career with us.

• Collaborative working environment - we stand shoulder to shoulder with our clients and our peers through good times and challenges
• We empower all passionate technology-loving professionals by allowing them to expand their skills and take part in inspiring projects
• Expleo Academy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses
• Enjoy a comprehensive benefits package, including hospitalization and outpatient insurance, a pension and group insurance plan, employee wellbeing initiatives, sports and social events, gifts for special occasions, and much more!
• Enjoy meal and eco vouchers to support your daily needs and sustainable purchases
• Receive monthly representation fees to support work-related expenses
• 32 vacation days (20 + 12 for a 40-hour week).
• Always working as one team, our people are not afraid to think big and question the status quo.
• Flexible homeworking policy - Balance your career and personal life

Expleo is a trusted partner for your innovation journey. As a global engineering, technology and consulting service provider, we are ideally positioned to help you achieve your ambitions and future-proof your business. With a smart blend of bold thinking and reliable execution, we're able to fast-track innovation through each step of your value chain.