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DEVELOPPEUR EXPERT C# (H/F)

Expert Developer – Application Modernization & Generative AI

The Expert Developer – Application Modernization & Generative AI is responsible for designing, developing, and integrating generative AI solutions and agentic architectures into enterprise systems. This role plays a key part in modernizing existing applications by enriching them with intelligent capabilities (LLMs, RAG, AI agents, copilots) to enhance efficiency, automation, and user experience.

The expert serves as a technical reference, contributes to solution engineering, and ensures rigorous execution aligned with IT standards.

Design and develop generative AI-powered features within existing applications (intelligent assistants, content processing, automated resolution, etc.).

  • Refactor and modernize components to enable seamless integration of LLMs and AI agents.
  • Implement APIs, microservices, and AI integration modules within existing IT architectures.
  • Collaborate with architects to translate technical requirements into scalable, industrializable solutions.

Generative & Agentic AI Integration

  • Develop RAG pipelines (indexing, vectorization, retrieval) and advanced contextualization mechanisms.
  • Implement guardrails, robust prompting, security policies, and quality control mechanisms.

Engineering, Quality & Performance

  • Produce maintainable, tested, high-performance code aligned with industry standards.
  • Conduct technical code reviews, propose improvements, and solve complex engineering challenges.
  • Diagnose, optimize, and monitor the performance of AI solutions in production.
  • Contribute to DevOps/MLOps/GenAIOps practices: Collaboration & Technical Leadership
  • Contribute to technical workshops, demos, and proofs of concept.
  • Provide advanced technical support to development teams integrating AI.
  • Stay up to date with advancements in generative AI, agentic architectures, RAG, and orchestration frameworks.
  • Experiment with new models, tools, and techniques to assess enterprise applicability.
  • Technical Skills

Generative AI & Agents

  • Expertise in RAG pipelines, embeddings, vector stores, hybrid search.
  • Excellent knowledge of Python (mandatory) and ideally another language (C#, Java, TypeScript).
  • Good understanding of cloud architectures (Azure, AWS, or GCP).

DevOps / MLOps / GenAIOps

  • CI/CD pipelines.
  • Familiarity with MLOps tools (MLflow, Vertex AI, Azure ML) — a plus.
  • Observability, model evaluation, and monitoring.

Ability to explain AI concepts to developers and stakeholders.

  • Rigor, attention to detail, and quality-driven mindset.
  • 5–10 years of experience in software development.
  • Experience with generative AI, LLMs, or intelligent systems (or proven project-based experience).
  • Practical experience integrating AI into existing applications or services.
  • Contributions to PoCs, pilots, or AI production projects.

#At CGI, we value the strength that diversity brings and are committed to fostering a workplace where everyone belongs. Come join our team—one of the largest IT and business consulting services firms in the world.

Développeur Expert Modernisation Applicative & IA Générative

Le Développeur Expert – Modernisation Applicative & IA Générative est responsable de concevoir, développer et intégrer des solutions d’IA générative et d’architectures agentiques dans les systèmes et applications d’entreprise. Il agit comme un référent technique, participe à l’ingénierie des solutions et assure une exécution rigoureuse et alignée sur les standards TI.

Collaborer avec les architectes pour traduire les besoins techniques en solutions concrètes et industrialisables.

Mettre en œuvre des pipelines RAG (indexation, vectorisation, retrieval) et des mécanismes de contextualisation avancée.

• Développer des garde-fous (guardrails), prompts robustes, politiques de sécurité et mécanismes de contrôle de qualité.

Ingénierie, qualité et performance

  • Réaliser des revues de code techniques, proposer des améliorations et résoudre des problématiques complexes.
  • Diagnostiquer, optimiser et monitorer les performances des solutions IA en production.
  • Participer aux pratiques DevOps/MLOps/GenAIOps : Contribuer activement aux ateliers techniques, démonstrations et preuves de concept.
  • Offrir un soutien technique avancé aux équipes de développement lors de l’intégration IA.
  • Veille technologique et innovation
  • Expérimenter de nouveaux modèles, outils et techniques, et évaluer leur applicabilité dans un contexte d’entreprise.
  • Compétences techniques recherchées

Conception de pipelines RAG : embeddings, vector stores, retrieval optimisés, hybrid search.

  • Excellente maîtrise de Python (obligatoire) et idéalement d’un autre langage tel que C#, Java ou TypeScript
  • Bonne compréhension des architectures cloud (Azure, AWS ou GCP).

DevOps / MLOps / GenAIOps

  • Pipelines CI/CD.
  • Outils MLOps (MLflow, Vertex AI, Azure ML) — atout.
  • Observabilité, évaluation et monitoring de modèles IA.

Capacité à vulgariser des concepts IA auprès d’autres développeurs ou parties prenantes.

  • Rigueur, souci du détail et orientation qualité.
  • 5 à 10 ans d’expérience en développement logiciel.
  • Expérience en IA générative, LLMs ou systèmes intelligents (ou expérience équivalente démontrable via projets).
  • Expérience concrète en intégration IA dans des applications ou services existants.
  • Contributions à des PoCs, pilotes ou projets IA en production.

#Joignez-vous à nous, l’une des plus importantes entreprises de conseil en technologie de l’information (TI) et en management au monde.

Expert Developer – Application Modernization & Generative AI

The Expert Developer – Application Modernization & Generative AI is responsible for designing, developing, and integrating generative AI solutions and agentic architectures into enterprise systems. This role plays a key part in modernizing existing applications by enriching them with intelligent capabilities (LLMs, RAG, AI agents, copilots) to enhance efficiency, automation, and user experience.

The expert serves as a technical reference, contributes to solution engineering, and ensures rigorous execution aligned with IT standards.

Design and develop generative AI-powered features within existing applications (intelligent assistants, content processing, automated resolution, etc.).

  • Refactor and modernize components to enable seamless integration of LLMs and AI agents.
  • Implement APIs, microservices, and AI integration modules within existing IT architectures.
  • Collaborate with architects to translate technical requirements into scalable, industrializable solutions.

Generative & Agentic AI Integration

  • Develop RAG pipelines (indexing, vectorization, retrieval) and advanced contextualization mechanisms.
  • Implement guardrails, robust prompting, security policies, and quality control mechanisms.

Engineering, Quality & Performance

  • Produce maintainable, tested, high-performance code aligned with industry standards.
  • Conduct technical code reviews, propose improvements, and solve complex engineering challenges.
  • Diagnose, optimize, and monitor the performance of AI solutions in production.
  • Contribute to DevOps/MLOps/GenAIOps practices: Collaboration & Technical Leadership
  • Contribute to technical workshops, demos, and proofs of concept.
  • Provide advanced technical support to development teams integrating AI.
  • Stay up to date with advancements in generative AI, agentic architectures, RAG, and orchestration frameworks.
  • Experiment with new models, tools, and techniques to assess enterprise applicability.
  • Technical Skills

Generative AI & Agents

  • Expertise in RAG pipelines, embeddings, vector stores, hybrid search.
  • Excellent knowledge of Python (mandatory) and ideally another language (C#, Java, TypeScript).
  • Good understanding of cloud architectures (Azure, AWS, or GCP).

DevOps / MLOps / GenAIOps

  • CI/CD pipelines.
  • Familiarity with MLOps tools (MLflow, Vertex AI, Azure ML) — a plus.
  • Observability, model evaluation, and monitoring.

Ability to explain AI concepts to developers and stakeholders.

  • Rigor, attention to detail, and quality-driven mindset.
  • 5–10 years of experience in software development.
  • Experience with generative AI, LLMs, or intelligent systems (or proven project-based experience).
  • Practical experience integrating AI into existing applications or services.
  • Contributions to PoCs, pilots, or AI production projects.

#At CGI, we value the strength that diversity brings and are committed to fostering a workplace where everyone belongs. Come join our team—one of the largest IT and business consulting services firms in the world.

Développeur Expert Modernisation Applicative & IA Générative

Le Développeur Expert – Modernisation Applicative & IA Générative est responsable de concevoir, développer et intégrer des solutions d’IA générative et d’architectures agentiques dans les systèmes et applications d’entreprise. Il agit comme un référent technique, participe à l’ingénierie des solutions et assure une exécution rigoureuse et alignée sur les standards TI.

Collaborer avec les architectes pour traduire les besoins techniques en solutions concrètes et industrialisables.

Mettre en œuvre des pipelines RAG (indexation, vectorisation, retrieval) et des mécanismes de contextualisation avancée.

• Développer des garde-fous (guardrails), prompts robustes, politiques de sécurité et mécanismes de contrôle de qualité.

Ingénierie, qualité et performance

  • Réaliser des revues de code techniques, proposer des améliorations et résoudre des problématiques complexes.
  • Diagnostiquer, optimiser et monitorer les performances des solutions IA en production.
  • Participer aux pratiques DevOps/MLOps/GenAIOps : Contribuer activement aux ateliers techniques, démonstrations et preuves de concept.
  • Offrir un soutien technique avancé aux équipes de développement lors de l’intégration IA.
  • Veille technologique et innovation
  • Expérimenter de nouveaux modèles, outils et techniques, et évaluer leur applicabilité dans un contexte d’entreprise.
  • Compétences techniques recherchées

Conception de pipelines RAG : embeddings, vector stores, retrieval optimisés, hybrid search.

  • Excellente maîtrise de Python (obligatoire) et idéalement d’un autre langage tel que C#, Java ou TypeScript
  • Bonne compréhension des architectures cloud (Azure, AWS ou GCP).

DevOps / MLOps / GenAIOps

  • Pipelines CI/CD.
  • Outils MLOps (MLflow, Vertex AI, Azure ML) — atout.
  • Observabilité, évaluation et monitoring de modèles IA.

Capacité à vulgariser des concepts IA auprès d’autres développeurs ou parties prenantes.

  • Rigueur, souci du détail et orientation qualité.
  • 5 à 10 ans d’expérience en développement logiciel.
  • Expérience en IA générative, LLMs ou systèmes intelligents (ou expérience équivalente démontrable via projets).
  • Expérience concrète en intégration IA dans des applications ou services existants.
  • Contributions à des PoCs, pilotes ou projets IA en production.

#Joignez-vous à nous, l’une des plus importantes entreprises de conseil en technologie de l’information (TI) et en management au monde.

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