Software Engineer (AI-centric applications)

Overview:

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.

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.
Responsibilities:

• 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

*“We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age”*

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