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Expert Splunk - Secteur bancaire (H/F)

ALTEN

Boulogne-Billancourt, IDF, France permanent

Posted: February 27, 2026

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Quick Summary

Leader européen de l'ingénierie et du conseil en technologies, ALTEN accompagne depuis plus de 35 ans les grands acteurs de l'industrie, des services et des télécommunications dans leurs projets de transformation et d'innovation.

Job Description

🚀 À propos d’ALTEN

Leader europĂ©en de l’ingĂ©nierie et du conseil en technologies, ALTEN accompagne depuis plus de 35 ans les grands acteurs de l’industrie, des services et des tĂ©lĂ©communications dans leurs projets de transformation et d’innovation.

Avec plus de 57 000 collaborateurs Ă  travers le monde, dont une part significative d’ingĂ©nieurs IT et experts en systĂšmes d’information, ALTEN intervient sur des projets Ă  forte valeur ajoutĂ©e dans les domaines du cloud, de la cybersĂ©curitĂ©, des infrastructures, de la data et de la transformation digitale.

Rejoindre ALTEN, c’est intĂ©grer un groupe international offrant des perspectives d’évolution, des projets stratĂ©giques et un environnement stimulant.

🎯 Contexte de la mission

Vous intĂ©grerez une Ă©quipe SĂ©curitĂ© / ObservabilitĂ© en charge de la gestion, de l’optimisation et de l’évolution d’une plateforme Splunk Enterprise / Splunk ES en environnement de production critique.

Les enjeux portent sur la performance, la sĂ©curitĂ©, la scalabilitĂ© et l’exploitation de donnĂ©es massives.

 Missions techniques :

đŸ—ïž Architecture & Design

‱ Concevoir et faire Ă©voluer l’architecture Splunk (indexers, search heads, forwarders, cluster manager)

‱ Participer au dimensionnement des infrastructures

‱ Assurer la haute disponibilitĂ© et la scalabilitĂ© de la plateforme

⚙ Build & Administration

‱ Installer, configurer et administrer les environnements Splunk Enterprise / Splunk ES

‱ Mettre en place et optimiser les flux d’ingestion (logs, mĂ©triques, Ă©vĂ©nements sĂ©curitĂ©)

‱ DĂ©velopper des dashboards avancĂ©s et des requĂȘtes SPL complexes

🔐 SĂ©curitĂ© & SIEM

‱ ImplĂ©menter et optimiser les cas d’usage de sĂ©curitĂ© (SIEM)

‱ Mettre en place des alertes et corrĂ©lations avancĂ©es

‱ Participer aux investigations sĂ©curitĂ© et Ă  l’analyse d’incidents

📊 Performance & Optimisation

‱ Optimiser l’indexation et la rĂ©tention des donnĂ©es

‱ AmĂ©liorer les performances des recherches et des tableaux de bord

‱ Assurer le capacity planning

đŸ€ Collaboration internationale

‱ Travailler avec des Ă©quipes SOC, Infra et DevOps

‱ Participer aux comitĂ©s techniques en anglais

‱ RĂ©diger la documentation technique et les standards

 

Compétences techniques attendues :

‱ Splunk Enterprise & Splunk Enterprise Security

‱ MaĂźtrise avancĂ©e du langage SPL

‱ Architecture distribuĂ©e Splunk (cluster, indexer cluster, SH cluster)

‱ Linux (RedHat / CentOS / Ubuntu)

‱ Scripts : Python, Bash

‱ Notions rĂ©seaux & sĂ©curitĂ© (firewall, proxy, flux, SIEM)

‱ IntĂ©gration avec outils tiers (SOAR, ITSM, outils de monitoring)

🎓 Profil recherchĂ©

‱ Bac +5 (Master Informatique) ou DiplĂŽme d’ingĂ©nieur en informatique

‱ Minimum 7 ans d’expĂ©rience en tant qu’Expert Splunk / IngĂ©nieur Splunk

‱ ExpĂ©rience confirmĂ©e en environnement de production critique

‱ Anglais professionnel (Ă©crit et oral)

‱ Une certification Splunk est un plus (Splunk Architect / Admin / ES)

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