{"id":3079,"date":"2024-05-12T16:58:29","date_gmt":"2024-05-12T14:58:29","guid":{"rendered":"https:\/\/www.5thfloor.be\/"},"modified":"2026-05-19T11:28:42","modified_gmt":"2026-05-19T09:28:42","slug":"plateforme-de-paiement-secteur-public-belge","status":"publish","type":"post","link":"https:\/\/www.5thfloor.be\/fr\/plateforme-de-paiement-secteur-public-belge\/","title":{"rendered":"Une plateforme de paiement pour le secteur public belge"},"content":{"rendered":"<p>Une ancienne version de SAP aux capacit\u00e9s d'int\u00e9gration limit\u00e9es. Plusieurs applications m\u00e9tier, chacune g\u00e9rant ses propres paiements vers SAP avec des niveaux d'int\u00e9gration variables. Une exigence l\u00e9gale pour une double validation de chaque ordre de paiement. Et aucune possibilit\u00e9 de visualiser, en un seul endroit, ce qui \u00e9tait pay\u00e9 dans toute l'organisation.<\/p>\n\n\n\n<p>C'est \u00e0 cette situation qu'une institution publique belge a demand\u00e9 \u00e0 5th floor d'apporter une solution. Cette institution traite un volume important de paiements li\u00e9s \u00e0 plusieurs processus m\u00e9tier : subsides, primes exceptionnelles, remboursements de frais, paiements ponctuels. SAP \u00e9tait au c\u0153ur de ce syst\u00e8me, mais chaque application m\u00e9tier devait s'int\u00e9grer \u00e0 SAP selon ses propres modalit\u00e9s. Il en r\u00e9sultait une couverture in\u00e9gale, une charge administrative importante li\u00e9e \u00e0 la conformit\u00e9 et l'absence de vue d'ensemble des flux de paiement.<\/p>\n\n\n\n<p>5th floor a con\u00e7u et d\u00e9velopp\u00e9 le \u00ab Hub de Finance \u00bb : une plateforme interm\u00e9diaire qui se situe entre les applications m\u00e9tier et SAP, centralise les flux de paiement et assure la conformit\u00e9 \u00e0 un seul niveau plut\u00f4t que dans chaque application. Le Hub traite environ 30 millions d'euros de paiements par mois, soit quelque 350 ordres de paiement par jour. SAP reste le syst\u00e8me comptable de r\u00e9f\u00e9rence. Le reste du portefeuille d'applications ne d\u00e9pend plus directement de lui.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les quatre probl\u00e8mes que le Hub r\u00e9soud<\/h2>\n\n\n\n<p>La phase de cadrage a identifi\u00e9 quatre obstacles structurels :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Une version obsol\u00e8te de SAP<\/strong> avec des capacit\u00e9s d'int\u00e9gration limit\u00e9es, ce qui faisait de chaque nouvelle connexion un projet personnalis\u00e9.<\/li>\n\n\n\n<li><strong>Une gestion d\u00e9centralis\u00e9e des paiements.<\/strong> Chaque application d'entreprise avait sa propre int\u00e9gration avec SAP, avec une couverture qui variait d'une \u00e0 l'autre.<\/li>\n\n\n\n<li><strong>Une difficult\u00e9 de conformit\u00e9.<\/strong> Le principe des quatre yeux (double validation lors de la liquidation des paiements) est une exigence l\u00e9gale, mais son application coh\u00e9rente \u00e0 travers les applications \u00e9tait difficile.<\/li>\n\n\n\n<li><strong>Pas de vue consolid\u00e9e<\/strong> des flux financiers transitant par l'organisation.<\/li>\n<\/ul>\n\n\n\n<p>Ces quatre contraintes ont fa\u00e7onn\u00e9 quatre objectifs strat\u00e9giques : centraliser les donn\u00e9es financi\u00e8res et comptables, simplifier les op\u00e9rations quotidiennes pour les \u00e9quipes financi\u00e8res et les responsables budg\u00e9taires, s\u00e9curiser et automatiser les contr\u00f4les avec une gestion fine des acc\u00e8s, et r\u00e9duire la d\u00e9pendance directe \u00e0 SAP pour le reste du portefeuille.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Le Hub de Finance : une plateforme entre les applications m\u00e9tier et SAP<\/h2>\n\n\n\n<p>Le Hub agit comme un interm\u00e9diaire strat\u00e9gique entre les applications m\u00e9tier et SAP. Il expose une API standardis\u00e9e et orient\u00e9e m\u00e9tier d'un c\u00f4t\u00e9, et g\u00e8re toutes les interactions SAP de l'autre. Les applications m\u00e9tier ne parlent plus SAP. Elles parlent Hub.<\/p>\n\n\n\n<p>La plateforme est construite autour de quatre briques fonctionnelles :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>R\u00e9ception et validation.<\/strong> Tous les ordres de paiement, quelle que soit leur origine commerciale, entrent par un point d'entr\u00e9e unique. Le Hub valide la structure, les r\u00e8gles m\u00e9tier et les r\u00e9f\u00e9rences budg\u00e9taires avant toute autre chose.<\/li>\n\n\n\n<li><strong>Flux de travail de liquidation avec double validation.<\/strong> Le principe des quatre yeux est appliqu\u00e9 \u00e0 l'int\u00e9rieur du Hub, avec une piste d'audit compl\u00e8te.<\/li>\n\n\n\n<li><strong>Transfert vers SAP.<\/strong> Une fois la commande valid\u00e9e, le Hub g\u00e9n\u00e8re automatiquement le rapport d'ordonnancement et le transf\u00e8re vers SAP.<\/li>\n\n\n\n<li><strong>Suivi en temps r\u00e9el.<\/strong> Toute application m\u00e9tier peut v\u00e9rifier le statut d'un paiement \u00e0 tout moment, via l'API.<\/li>\n<\/ul>\n\n\n\n<p>Autour de ces quatre briques, le Hub centralise \u00e9galement les donn\u00e9es financi\u00e8res de r\u00e9f\u00e9rence qui \u00e9taient pr\u00e9c\u00e9demment configur\u00e9es dans SAP : comptes g\u00e9n\u00e9raux, postes budg\u00e9taires, programmes, engag\u00e9s. Les agents financiers g\u00e8rent ces donn\u00e9es via une interface unifi\u00e9e, directement dans le Hub. La d\u00e9pendance vis-\u00e0-vis de SAP pour la configuration quotidienne est drastiquement r\u00e9duite.<\/p>\n\n\n\n<p>Chaque transaction transitant par le Hub est trac\u00e9e et disponible pour analyse. Cet historique consolid\u00e9 alimente le reporting et la business intelligence de l'institution, offrant aux d\u00e9cideurs une vision des flux financiers qui n'existait pas auparavant.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment 5th floor a men\u00e9 \u00e0 bien ce projet<\/h2>\n\n\n\n<p>Le Hub a \u00e9t\u00e9 construit dans une approche agile et it\u00e9rative.<\/p>\n\n\n\n<p><strong>D\u00e9couverte et conception.<\/strong> Des ateliers collaboratifs avec les \u00e9quipes m\u00e9tiers et financi\u00e8res ont permis de cartographier en profondeur les processus de paiement existants. L'objectif \u00e9tait de concevoir une solution adapt\u00e9e au contexte op\u00e9rationnel, et non d'imposer un mod\u00e8le.<\/p>\n\n\n\n<p><strong>MVP \u00e0 partir du flux le plus volumineux.<\/strong> La premi\u00e8re version de production couvrait les subsides, le type de paiement le plus important en volume financier. Mettre ce flux en production en premier a rapidement apport\u00e9 une valeur visible et a r\u00e9duit les risques pour le reste de la feuille de route.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D\u00e9ploiement progressif en quatre phases.<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Phase 1 : Fonctionnalit\u00e9s de liquidation et de validation de base, avec g\u00e9n\u00e9ration de rapports SAP.<\/li>\n\n\n\n<li>Phase 2 : Extension \u00e0 d'autres types de paiement (remboursements, primes, paiements exceptionnels).<\/li>\n\n\n\n<li>Phase 3 : Fonctionnalit\u00e9 d'historique de recherche et de commande.<\/li>\n\n\n\n<li>Phase 4 : Modules de gestion et de configuration des donn\u00e9es de r\u00e9f\u00e9rence financi\u00e8res.<\/li>\n<\/ul>\n\n\n\n<p><strong>Co-cr\u00e9ation UX.<\/strong> Chaque \u00e9cran a \u00e9t\u00e9 con\u00e7u en collaboration avec les agents financiers et les experts m\u00e9tier qui allaient l'utiliser. Le r\u00e9sultat est une interface que les utilisateurs ont adopt\u00e9e sans programme de formation formel.<\/p>\n\n\n\n<p><strong>DevOps et livraison continue.<\/strong> Des cycles de d\u00e9veloppement courts, des tests utilisateurs r\u00e9guliers et des mises en production fr\u00e9quentes ont \u00e9t\u00e9 accompagn\u00e9s d&#x27;un soutien \u00e9troit de la part de l&#x27;\u00e9quipe 5th floor \u00e0 chaque mise en service. Les retours recueillis apr\u00e8s chaque mise en production ont \u00e9t\u00e9 directement pris en compte dans l&#x27;it\u00e9ration suivante.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Architecture technique<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Composant<\/strong><\/td><td><strong>Technologies<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Backend<\/td><td>Microservices REST Java<\/td><\/tr><tr><td>Frontend<\/td><td>Angular<\/td><\/tr><tr><td>DevOps<\/td><td>Pipelines CI\/CD<\/td><\/tr><tr><td>Architecture<\/td><td>Microservices modulaires et \u00e9volutifs<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Les microservices sont organis\u00e9s par domaine m\u00e9tier, ce qui permet \u00e0 chaque module d'\u00eatre maintenable ind\u00e9pendamment. Le Hub s'int\u00e8gre \u00e9galement \u00e0 l'environnement num\u00e9rique plus large de l'institution : la gestion \u00e9lectronique des documents (GED) pour les pi\u00e8ces justificatives, la r\u00e9f\u00e9rence centralis\u00e9e des b\u00e9n\u00e9ficiaires et de l'organigramme, ainsi que les outils de Business Intelligence (BI) qui consomment les donn\u00e9es de paiement consolid\u00e9es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sultats<\/h2>\n\n\n\n<figure class=\"wp-block-table aligncenter\"><table class=\"has-fixed-layout\"><thead><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>30M\u20ac par mois<\/strong><\/td><td><strong>350 ordres \/ jour<\/strong><\/td><td><strong>Principe des quatre yeux<\/strong><\/td><td><strong>D\u00e9pendance SAP<\/strong><\/td><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">de paiement achemin\u00e9 via le Hub<\/td><td>trait\u00e9s avec une tra\u00e7abilit\u00e9 compl\u00e8te<\/td><td>appliqu\u00e9 syst\u00e9matiquement, avec journal d'audit<\/td><td>drastiquement r\u00e9duite pour les applications m\u00e9tier<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Au-del\u00e0 des indicateurs de volume, les avantages op\u00e9rationnels sont tangibles :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>La conformit\u00e9 r\u00e9glementaire<\/strong> est d\u00e9sormais syst\u00e9matique, avec une piste d'audit compl\u00e8te plut\u00f4t que des impl\u00e9mentations application par application.<\/li>\n\n\n\n<li><strong>Efficacit\u00e9 op\u00e9rationnelle.<\/strong> La validation et la liquidation sont rationalis\u00e9es et acc\u00e9l\u00e9r\u00e9es.<\/li>\n\n\n\n<li><strong>Autonomie des \u00e9quipes m\u00e9tier.<\/strong> Les applications n'ont plus besoin d'expertise SAP pour g\u00e9rer leurs paiements.<\/li>\n\n\n\n<li><strong>Visibilit\u00e9.<\/strong> Une vue consolid\u00e9e en temps r\u00e9el de chaque flux financier, disponible pour les d\u00e9cideurs.<\/li>\n\n\n\n<li><strong>R\u00e9duction des risques.<\/strong> L'automatisation du contr\u00f4le \u00e9limine les erreurs manuelles qui passaient auparavant inaper\u00e7ues.<\/li>\n<\/ul>\n\n\n\n<p>L'adoption a \u00e9t\u00e9 large. La co-construction avec les utilisateurs finaux a entra\u00een\u00e9 une courbe d'apprentissage minimale et une adoption rapide par les parties prenantes.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-uagb-image uagb-block-e5c6cb42 wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><noscript><img decoding=\"async\" srcset=\"https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/case-study-finance-hub-768x1024.png ,https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/case-study-finance-hub.png 780w, https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/case-study-finance-hub.png 360w\" sizes=\"auto, (max-width: 480px) 150px\" src=\"https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/case-study-finance-hub-768x1024.png\" alt class=\"uag-image-3083\" width=\"896\" height=\"1194\" title=\"centre-d&#039;\u00e9tude-de-cas-finance\" loading=\"lazy\" role=\"img\"><\/noscript><img decoding=\"async\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20896%201194%22%3E%3C%2Fsvg%3E 896w\" sizes=\"auto, (max-width: 480px) 150px\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20896%201194%22%3E%3C%2Fsvg%3E\" alt class=\"uag-image-3083 lazyload\" width=\"896\" height=\"1194\" title=\"centre-d&#039;\u00e9tude-de-cas-finance\" loading=\"lazy\" role=\"img\" data-srcset=\"https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/case-study-finance-hub-768x1024.png ,https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/case-study-finance-hub.png 780w, https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/case-study-finance-hub.png 360w\" data-src=\"https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/case-study-finance-hub-768x1024.png\"><\/figure><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p><\/p>\n\n\n\n<div class=\"wp-block-uagb-buttons uagb-buttons__outer-wrap uagb-btn__medium-btn uagb-btn-tablet__default-btn uagb-btn-mobile__default-btn uagb-block-c2e57e2d\"><div class=\"uagb-buttons__wrap uagb-buttons-layout-wrap\">\n<div class=\"wp-block-uagb-buttons-child uagb-buttons__outer-wrap uagb-block-76e3aff5 wp-block-button\"><div class=\"uagb-button__wrapper\"><a class=\"uagb-buttons-repeater wp-block-button__link\" aria-label href=\"https:\/\/www.5thfloor.be\/wp-content\/uploads\/2026\/05\/5thfloor_CaseStudies_flux-de-paiement-centralise\u0301s-2.pdf\" rel=\"follow noopener\" target=\"_self\" role=\"button\"><div class=\"uagb-button__link\">T\u00e9l\u00e9charger l&#x27;\u00e9tude de cas<\/div><\/a><\/div><\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">O\u00f9 en est le projet<\/h2>\n\n\n\n<p>Le Hub de Finance est un produit abouti. L'essentiel des fonctionnalit\u00e9s est couvert et la plateforme est stable. 5th floor poursuit ce partenariat en assurant la maintenance corrective, les \u00e9volutions fonctionnelles mineures lorsque de nouveaux besoins apparaissent, les mises \u00e0 niveau technologiques des frameworks (Angular et autres) et des d\u00e9pendances, ainsi que l'assistance quotidienne aux utilisateurs afin de garantir la productivit\u00e9 des \u00e9quipes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ce que ce projet d\u00e9montre<\/h2>\n\n\n\n<p>Le Hub de Finance illustre la mani\u00e8re dont 5th floor aborde les environnements commerciaux et r\u00e9glementaires complexes :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Comprendre en profondeur les contraintes commerciales et de conformit\u00e9 avant d'\u00e9crire du code.<\/li>\n\n\n\n<li>Concevoir des solutions robustes pour des volumes financiers critiques.<\/li>\n\n\n\n<li>Appliquer une m\u00e9thode agile avec de la co-cr\u00e9ation r\u00e9elle et des it\u00e9rations courtes.<\/li>\n\n\n\n<li>S'int\u00e9grer proprement dans les \u00e9cosyst\u00e8mes existants plut\u00f4t que de les remplacer.<\/li>\n\n\n\n<li>Rester impliqu\u00e9 bien apr\u00e8s le lancement, afin que la solution continue de produire des r\u00e9sultats.<\/li>\n<\/ul>\n\n\n\n<p>Au-del\u00e0 de la technologie, le projet est une \u00e9tude de cas en mati\u00e8re de collaboration. Les utilisateurs ont \u00e9t\u00e9 au centre du processus de conception tout au long. Le succ\u00e8s du Hub repose autant sur la relation de travail avec le client que sur l'ex\u00e9cution technique.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Envie d\u2019en savoir plus ?<\/h2>\n\n\n\n<p>Contactez-nous par <a href=\"mailto:sales@5thfloor.be\">sales@5thfloor.be<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>An older SAP version with limited integration capabilities. Several business applications, each managing its own payments to SAP with varying levels of integration. A legal requirement for dual validation on every payment order. And no way to see, in one place, what was being paid across the organization. That was the situation a Belgian public [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":3084,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_uag_custom_page_level_css":"","_post_is_featured":"","_post_subtitle":"How 5th floor centralized 30M\u20ac in monthly payment flows","_post_team_members":[],"_post_wp_authors":[6],"_post_external_authors":[],"footnotes":""},"categories":[49],"tags":[],"class_list":["post-3079","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Payment hub for the Belgian public sector | 5th floor<\/title>\n<meta name=\"description\" content=\"The Finance Hub, a payment hub built by 5th floor for the Belgian public sector. 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