---
title: 'Lead Software Engineer (F/H) at ILLUIN Technology'
canonical: 'https://feeny.ai/job/lead-software-engineer-f-h-illuin-technology-paris-q1tmqj30ket4'
type: 'job'
last_seen: '2026-10-18'
---

# Lead Software Engineer (F/H) at ILLUIN Technology

- **Company:** ILLUIN Technology
- **Location:** Paris, France
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-10-02
- **Last confirmed live:** 2026-10-18
- **Apply:** https://jobs.ashbyhq.com/illuin/b4946ee8-6359-4d96-83f3-6e5c032990ac

## Job description

ILLUIN est à la pointe de la technologie sur des sujets d'Intelligence Artificielle et de Software Engineering, menant des projets clients sur mesure ainsi que ses propres produits innovants (agents conversationnels, parsing de documents, traitement de la voix.). En tant que Lead Software Engineer, votre rôle sera de guider techniquement l'équipe, de garantir l'excellence de la conception et de contribuer au développement de solutions technologiques de pointe.

→ Votre mission En tant que Lead Software Engineer, vous êtes le pilier technique de votre équipe. Votre rôle est double : contribuer activement au développement des solutions technologiques de pointe tout en encadrant et faisant monter en compétence les Software Engineers de votre équipe, en assurant la qualité, la performance et l'évolutivité des architectures logicielles.

Vous pourriez intervenir sur différentes typologies de projets comme :

- La conception et développement d'une architecture software et Ops industrialisant un agent IA d'aide à la rédactions de documents métiers.
- Le développement d'une pipeline de traitement et de transformation de données à grande échelle pour un client du secteur de la logistique.
- L'évolution des fonctionnalités et au déploiement de notre produit dialogue pour la mise en place d'agents conversationnels (approches "agentiques", RAG, hybrides).

→ Vos responsabilités

- Définir, valider et faire appliquer les choix techniques et architecturaux (design patterns, technologies, bonnes pratiques) en collaboration avec les architectes.
- Garantir l'excellence technique et la maintenabilité du code (revues de code approfondies, standards de qualité, performance).
- Participer activement au développement des fonctionnalités les plus complexes ou stratégiques du produit/projet.
- Piloter les réunions techniques (revues d'architecture, choix d'outillage) et participer aux sprint reviews en lien direct avec le client/produit.
- Être force de proposition sur l'amélioration continue des outils, des méthodes et des processus de développement (CI/CD, DevOps).
- Encadrer et mentorer l'équipe projet, en favorisant leur développement technique.
- Contribuer à la stratégie technique long-terme et à l'industrialisation des projets internes transverses.

Profil recherché Nous cherchons le match parfait 💓 …mais nous croyons à la richesse des rencontres ! Alors si vous n’êtes pas certain.e de matcher notre recherche nous vous encourageons à nous contacter quand même ✉️

✅ Must have

- Diplôme d'une grande école d'Ingénieur ou d'une formation Bac + 5 en ingénierie logicielle
- Expérience significative (minimum 4 ans) en développement logiciel, sur des applications complexes en production.
- Expertise approfondie dans au moins un langage de programmation majeur (Java / Kotlin / PHP / TypeScript / Python/...).
- Maîtrise de la conception et de la validation d'architectures
- Expérience solide avec un framework back-end (Spring, Symfony, Nest.js, Django/Fast API) et/ou front-end (Angular, React, Vue.js)
- Capacité à définir une stratégie CI/CD et maîtrise avancée de Git et des outils d'intégration/déploiement continu.
- Expertise dans le fonctionnement des bases de données relationnelles (SQL) et NoSQL, et dans l'optimisation des requêtes.
- Maîtrise de Docker et des pratiques DevOps/Ops.
- Première expérience réussie dans l'encadrement technique d'un projet.

🌈 Nice to have

- Maîtrise de Kubernetes et des pratiques IaC (Terraform, Pulumi, Ansible...).
- Expérience significative sur des outils cloud majeurs (Google Cloud, AWS, Azure, OpenStack...).
- Expérience avec des outils de gestion d’évènements (Kafka, RabbitMQ, ActiveMQ…) et de systèmes distribués.
- Compétences de base en UI/UX pour pouvoir challenger les spécifications fonctionnelles.
- Connaissances ou intérêt marqué pour les technologies liées à l'Intelligence Artificielle/Machine Learning.

🤩 Les gens disent de vous que…

- Vous êtes un leader technique reconnu qui aime transmettre son savoir.
- Votre rigueur technique vous permet de prendre les meilleures décisions architecturales pour le long terme.
- Vous êtes engagé.e, autonome et possédez une forte capacité à résoudre des problèmes complexes.
- Vous faites preuve d'une bonne capacité de communication.

## About ILLUIN Technology

## Company Overview
- **One-liner**: ILLUIN Technology is a French AI and advanced digital solutions company that designs, deploys, and industrializes custom AI, data engineering, and software engineering projects for enterprises.
- **Entity Type**: Private (bootstrapped/profitable services company; no public funding rounds disclosed)
- **Headquarters**: Paris, France
- **Founded**: 2017
- **Founders**: Not publicly disclosed on the website or in major sources

## Core Business
- **Primary industry**: AI & Digital Services / AI Consulting & Engineering
- **Target customers**: B2B, Enterprise clients requiring custom AI, data, and software solutions
- **Mission statement**: "Changing the code(s) is creating with our customers the future of digital technology and AI that will have the greatest possible impact on society."

## Products & Services

- **nAIxt**: A low-code AI studio for developing, orchestrating, deploying, and monitoring custom agentic, generative, composite, and multimodal AI configurations.
- **Automated System**: A product suite for designing, deploying, and managing conversational assistants that combine GenAI AI Agents with guided decision trees.
- **Dialogue**: A state-of-the-art product suite for building conversational AI solutions.
- **Analyze**: A data analytics platform that connects various data sources, selects analytics engines, and generates customized dashboards for insights.
- **Custom AI, GenAI & Data Science Services**: End-to-end project design and industrialization, covering Data Science, Data Engineering, DataOps, MLOps, and Software Engineering.
- **Data Engineering Services**: Building reliable, scalable data pipelines integrated into existing systems.
- **Software Engineering Services**: From demonstrator to industrialized, IS-integrated, resilient, modular solutions.

## Market Standing
- **Valuation/Market Cap**: Not publicly available (private company).
- **Key Metric**: 100+ experts on the team; ranked #1 in its category in the HappyAtWork Index for 2024 and 2025.
- **Notable Investors/Partners**: Partners include Latitudes, Paris Digital Lab (for Tech4Good and student coaching), and an ecosystem of academic, scientific, technical, integration, and distribution partners.
- **Growth Signals**: Strong internal R&D focus (8 years of R&D); high employee satisfaction scores (100% for salary/recognition, 96.1% for agility/work organization); active open-source contributions (37 public repos on GitHub, including the popular ColPali project with 2,668 stars).

## Competitive Advantages
- **Technical Excellence**: Engineers come from top European training programs and are recognized as high-level experts in AI, Software Engineering, and Data Engineering.
- **Speed & Business Vision**: Teams combine deep technical expertise with rapid understanding of business challenges and sector specialization.
- **Maker DNA**: Described by customers as "pleasant, committed personalities working alongside in-house teams, who like to roll up their sleeves to find elegant solutions to complex problems."
- **Multidisciplinary Expertise**: Covers the full stack from Data Science to Software Engineering, enabling end-to-end project ownership.
- **Proprietary Technology Suite**: The nAIxt low-code AI studio and other internal products provide a competitive edge in delivering complex AI solutions quickly.

## Strategic Focus
- **Agentic AI**: Fully embracing the agentic AI paradigm, with the ILLUIN Technology suite designed to turn the potential of AI agents into reality (saving employee time, ultra-personalizing customer experience, advanced process automation).
- **R&D Innovation**: Significant investment in R&D (8 years of dedicated research) to push the boundaries of the state of the art and accelerate its application in organizations.
- **Positive Impact**: Committed to having a positive impact on customers, users, and society through high-performance, elegant, and useful products.
- **Talent Development**: Focus on selective recruitment, troop loyalty, and a fulfilling intellectual environment to maintain elite team quality.

## Why Work Here
- **Culture & Environment**: Ranked #1 in its category in the HappyAtWork Index for 2024 and 2025, with a commitment score of 81/100. Employee satisfaction scores include 100% for salary/recognition, 96.1% for agility/work organization, 94.6% for professional development, 94.1% for managerial relations, 90.5% for pride, and 100% for pleasure/fun.
- **Office & Perks**: Office in Paris with coffee, tea, snacks, fruit, board games, piano, gym, and library. Top-of-the-range equipment (Macbook Pro/DELL XPS, QHD screen). Choice to order additional equipment as needed.
- **Work Policy**: Not explicitly stated as remote-first, but the culture emphasizes agility and work organization (96.1% satisfaction). Likely hybrid or flexible based on consulting nature.
- **Career Development**: A development framework for rapid progression, in-house skills tracking tools for visibility, and the ability to shape one's own job through variety of customers, technologies, and programs (startup studio, student coaching, Tech4Good).
- **Engineering Culture**: Strong tech culture with emphasis on intellectual stimulation, initiative-taking, and technical excellence. Engineers work on varied technical challenges and technologies.
- **Diversity & Inclusion**: Committed to encouraging women in tech and AI careers, with an EGAPRO index (gender equality index) reported.
- **Profiles Sought**: Data Science (Data Scientist, Research Data Scientist, NLU/LLM Engineer, RAG Expert, GenAI Pipeline Designer), Data Engineering (Data Engineer, Data Architect, Data Ops, ML Engineer, LLM/MLOps Engineer), Software Engineering (Software Engineer, AI Architect, DevOps), and Business Development (Account Executive, Business Representative, Marketing Project Lead, Communication), plus Product & Design (Product Manager, UX Designer, UI Designer, DA).

## Sources
1. [ILLUIN Technology Official Website](https://www.illuin.tech/en/)
2. [ILLUIN Technology - About Us](https://www.illuin.tech/en/societe/notre-equipe/qui-sommes-nous/)
3. [ILLUIN Technology - Why Join Us](https://www.illuin.tech/en/societe/notre-equipe/pourquoi-nous-rejoindre/)
4. [ILLUIN Technology - Careers Page (Ashby)](https://jobs.ashbyhq.com/illuin)
5. [ILLUIN Technology GitHub Organization](https://github.com/illuin-tech)

## Other roles at ILLUIN Technology

- [Junior Applied AI Engineer](https://feeny.ai/job/junior-applied-ai-engineer-illuin-technology-paris-c47tz0wn4fcs) — Paris, France
- [Lead Applied AI Engineer (F/H)](https://feeny.ai/job/lead-applied-ai-engineer-f-h-illuin-technology-paris-0044y35dnv4j) — Paris, France
- [Senior Applied AI Engineer (F/H)](https://feeny.ai/job/senior-applied-ai-engineer-f-h-illuin-technology-paris-w7z137vqmgs7) — Paris, France
- [Lead Delivery /Senior Project Manager (F/H)](https://feeny.ai/job/lead-delivery-senior-project-manager-f-h-illuin-technology-paris-mpsmbfry0wvt) — Paris, France
- [Senior Applied AI Manager (F/H)](https://feeny.ai/job/senior-applied-ai-manager-f-h-illuin-technology-paris-1qs9ek89ebs6) — Paris, France
- [Applied IA Manager (F/H)](https://feeny.ai/job/applied-ia-manager-f-h-illuin-technology-paris-4cbmtqw1b7jy) — Paris, France
- [Software Engineer (F/H)](https://feeny.ai/job/software-engineer-f-h-illuin-technology-paris-3hm90gy55v69) — Paris, France
- [Senior Account Executive - Telecommunications (F/H)](https://feeny.ai/job/senior-account-executive-telecommunications-f-h-illuin-technology-paris-260kpjj2pdsj) — Paris, France
- [Senior Software & Data Engineering (H/F)](https://feeny.ai/job/senior-software-data-engineering-h-f-illuin-technology-paris-nxz91hb211jh) — Paris, France
- [Forward Deployment Strategist](https://feeny.ai/job/forward-deployment-strategist-illuin-technology-paris-13qf1qbyetr6) — Paris, France