Freelancer profile translated to English.
Back to original languageAbout Tantchonta
Enterprise architect with over 15 years of experience, I transform the complexity of information systems into performance levers.
Specializing in IT modernization – from legacy to cloud – I support SMEs and large groups in their digital transformation and data valorization challenges, by designing modern, scalable, and ultra-secure architectures.
My main objective is to align technology with business challenges to create high-performing, coherent, and future-ready systems.
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 50km)
Experience
- Agence des Systemes d'Information etdu Numérique- BéninEnterprise Architect | National Chief Architect OfficerDIGITAL AND ITMarch 2025 - August 2025 (5 months)Cotonou, BeninSituationFounded in 2017, ASIN is the Beninese government agency responsible for digital transformation, interoperability of public systems, data governance, and steering smart administration cross-functional projects.The country aims to build a sovereign, agile, and interconnected digital state to support its socio-economic development.Tasks• Steer the national digital strategy and define IS architecture standards for the State.• Design and maintain IT architectures (sovereign cloud, national data lake, X-Road interoperability, eID, PKI).• Lead and manage the architecture committee and office• Analyze and provide technical and compliance opinions on architecture designs• Ensure state data governance and alignment of public IS with international standards.• Optimize costs, reduce timelines, and strengthen the security of critical systems.Actions• Development and implementation of the national governmental architecture framework (TOGAF 9.2).• Design and deployment of the national interoperability platform based on X-Road.• Definition of the national PKI and integration with digital identity.• Pooling of IT infrastructures to reduce redundancies.• Leading the architecture office and the national architecture committee to align methodologies and technical priorities.Results• +40% compliance of public IS with international standards (TOGAF 9.2).• 20-30% savings on IT budgets through pooling.• -20 to -40% reduction in deployment times for strategic projects.• Inter-agency exchanges accelerated from several days to a few minutes via X-Road.• Complete dematerialization of numerous public services thanks to PKI and eID.• Significant improvement in data quality and reliability → faster and better-informed public decisions.
- LocamIS ArchitectBANKING AND INSURANCEFebruary 2019 - June 2021 (2 years and 4 months)Lyon, France
Technical redesign of Locam Web and back office applications,
- significant improvement in response times- redesign of application solutions- collection and centralization of production data for intelligent analysis- statistics management- anonymization and non-repudiation of sensitive personal data- backward compatibility with the entire ecosystemDesign and implementation of a service-oriented hybrid architecture:
- process-oriented microservices and integrated business solutions for back-office operations- Design a microservices architecture for a high-availability sensitive platform- Design application and hardware architecture- Identification of generic and specific application parts- Design of microservices according to company needs and existing functionalities - Data storage in heterogeneous systems- Study, benchmark of suitable API management solutions- Microservices orchestration- Design a multidimensional migration plan (applications / data / flows and interconnections with third-party IS)- Design and implementation of an interconnection engine to sensitive third-party systems in the fields of probative electronic document management, banking, and electronic signature - AudiSoftware Architect | Project Manager | CRM Web Platform ManagerAUTOMOBILEJanuary 2017 - June 2019 (2 years and 6 months)Paris, FranceSituationAudi France, a subsidiary of the Volkswagen Group, needed to modernize its critical business software to improve performance, security, and compliance, while ensuring full compatibility with the existing ecosystem.The context involved massive data processing, export management, personal data anonymization, and non-repudiation of user actions.Tasks• Design a new software architecture focused on performance and security.• Functional support• Preparation of technical and functional elements for implementation• Ensure backward compatibility with all existing systems.• Define and implement a security plan and a migration plan.• Manage an international technical team of 34 people.• Ensure budget monitoring and IT security training.Actions• Complete technical overhaul through an event-sensitive microservices architecture for asynchronous massive data processing.• Deployment of a high-performance infrastructure with anonymization and non-repudiation mechanisms.• Implementation of IT security tools and methods adapted to the Volkswagen group.• Management of the progressive migration to the new architecture, minimizing service interruptions.• Coordination of teams spread across 3 countries and optimization of development processes.Results• Significant improvement in application response times, reduced from several seconds to less than 500 ms.• Complete security of sensitive data and GDPR compliance achieved.• Zero major interruptions during migration thanks to the progressive strategy.• Improved team productivity through a modular architecture and adapted tools.• Budget optimization with reduced operating costs and better IT expenditure forecasting.
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Education
- Engineer in Advanced Information SystemsInstitute of Business Administration | Jean Moulin University Lyon 3
Certifications
- TOGAFOpen Group2016