Djimera Sileymane

Payplug is a French payment solution designed for merchants, e-commerce merchants of all sizes, and fintech companies. As an architect and backend developer in a financial services context, I supported the team's digital transformation by migrating to microservice architectures, implementing event-driven systems, and integrating IAM solutions (Ory). I focused on API design to ensure secure, scalable payment integrations. • Spearheaded digital transformation by designing RESTful APIs for merchant onboarding, defining standards for naming, security (OAuth2/JWT), and versioning to align with business needs. • Conceived functional and technical architecture using Ory (Kratos, Hydra, Keto), including API specifications via OpenAPI/Swagger for seamless integration and governance. • Collaborated with development, architecture, and business teams to define API lifecycle processes, ensuring compliance and scalability in a fintech environment. • Designed functional and technical architecture for merchant onboarding using Ory (Kratos, Hydra, Keto). • Integrated IAM solutions to enhance security and access control. Technologies: Python (FastAPI), DDD, Ory, GCP, AWS, RabbitMQ

Diaspo App is the first app that enables easy management of tontines. It consolidates all types of tontines for better use by communities and addresses all their needs in managing financial flows. As Head of Architecture and Back-end, I designed the entire platform for core banking, payment services, and wallet integrations, emphasizing API design for secure financial transactions and external BaaS integrations. • Designed and implemented APIs for the Diaspo App, including RESTful endpoints for tontine management, core banking, and wallet services, adhering to standards for security (OAuth2/JWT) and versioning • Architected API integrations with external BaaS providers, defining specifications via Swagger/OpenAPI, and ensuring compliance with financial protocols like HTTP. • Developed KYC systems and compliance rule management APIs, incorporating event-driven architectures for real-time financial flows • Architected core banking, payment, and wallet platforms with integrations to external BaaS providers. • Collaborated with development and business teams on API governance, from initial design to lifecycle management, including cash-in/cash-out and fundraising mechanisms • Implemented cash-in/cash-out systems and fundraising mechanisms. • Utilized tools like Postman for API testing and validation, maintaining high communication standards in a multilingual, technical English environment Technologies. :Python (FastAPI), Kafka, PHP (Laravel), DDD, CQRS, Ory, JavaScript, Typescript, Kafka

Diaspo App is the first app that enables easy management of tontines. It consolidates all types of tontines for better use by communities and addresses all their needs in managing financial flows. As Head of Architecture and Back-end, I designed the entire platform for core banking, payment services, and wallet integrations, emphasizing API design for secure financial transactions and external BaaS integrations. • Designed and implemented APIs for the Diaspo App, including RESTful endpoints for tontine management, core banking, and wallet services, adhering to standards for security (OAuth2/JWT) and versioning • Architected API integrations with external BaaS providers, defining specifications via Swagger/OpenAPI, and ensuring compliance with financial protocols like HTTP. • Developed KYC systems and compliance rule management APIs, incorporating event-driven architectures for real-time financial flows • Architected core banking, payment, and wallet platforms with integrations to external BaaS providers. • Collaborated with development and business teams on API governance, from initial design to lifecycle management, including cash-in/cash-out and fundraising mechanisms • Implemented cash-in/cash-out systems and fundraising mechanisms. • Utilized tools like Postman for API testing and validation, maintaining high communication standards in a multilingual, technical English environment Technologies : Python (FastAPI), PHP (Laravel), DDD, CQRS, JavaScript, Typescript, AWS(Eventbrudge, EKS,ECS, S3)

- Migration of monolithic services to microservice architecture - Integration of a single sign-on system with ORY (Hydra, Kratos, Keto): #- Passkeys & passwordless #- Multifactor Authentication (MFA) #- Enterprise Social Sign On (SSO) #- Social Sign On (SSO) Plus-Que-Pro: the network to identify quality companies recommended by their customers: As Head Architect and Backend in a services-oriented company, I led the digital transformation of all platforms, migrating over a dozen monolithic projects to a distributed, microservice-oriented architecture. This enhanced API communication between services and leveraged event-driven solutions for flexibility. Working with a team of over 35 developers across nine squads, I collaborated with tech leads to implement API-centric designs, meeting company needs • Led the migration of 40+ monolithic projects to a distributed microservice architecture, designing REST and event-driven APIs to improve scalability, maintainability, and interoperability. • Defined event-driven API architecture (using Kafka) to enhance flexibility, with standards for security (JWT/OAuth2), versioning, and naming conventions. • Implemented a unified IAM system with Ory (Kratos, Hydra, Keto), drafting OpenAPI/Swagger specifications for authentication and access rights APIs. • Collaborated on API governance, participating in the full lifecycle from conception to deployment, and documented architectures for cross-team alignment • Ensured excellent communication with squads to translate business requirements into technical API designs, incorporating principles like DDD and CQRS. • Drafted comprehensive architecture and service documentation for a team of 35+ developers across nine squads. Technologies : Python (FastAPI), Kafka, PHP (Laravel), DDD, CQRS, Ory, JavaScript, Typescript

Shadow has been innovating to make technology more accessible to all, allowing you to access a full PC in the cloud. shadow.tech : “YOUR PC, IN THE CLOUD” As the second architect and backend developer on the team known as CBP (Core Business Platform), my role within the team was to help build Europe's first sovereign cloud. In doing so, my primary task was to first think through what was needed to define the best microservice-oriented distributed architecture. My focus was on scalable API designs that allow flexible component addition/removal. • Contributed to designing microservice APIs for Europe's sovereign cloud, incorporating REST and event-driven principles for subscription and payment platforms • Developed and released Shadow Drive APIs in six months, supporting France and Spain, with standards for naming, security (JWT/OAuth2), and versioning documented in OpenAPI/Swagger. • Built API-centric subscription and payment services, collaborating with teams on governance and lifecycle to ensure maintainability • Defined architecture for scalable, flexible APIs using tools like Postman for validation and ensuring protocol compliance (HTTP). • Facilitated cross-team communication to align API designs with business needs in an Agile environment • Developed and released Shadow Drive in six months, supporting France and Spain. • Built subscription and payment platforms for cloud services. Technologies: Python (FastAPI, Flask, Django), PostgreSQL, Celery, RabbitMQ, MongoDB, GCP, ReactJS, JavaScript, Typescript

Sentinel Bee Hive est une entreprise de solution innovante dans le domaine de l’apiculture. - Développement de la plateforme de suivi et de Reporting des ruches connectées - Développement infrastructure serveur pour les outils internes. - Réalisation de modules métiers pour le data processing et le suivi du comportement des abeilles. Stack: PHP LARAVEL, MariaDB, RUST, AWS (SQS, SNS, Lambda, COGNITO) DDD – TDD – BEHATJQUERY, AJAX, SWAGGER, OPENAPI

Fintech : Développement de solution de paiement. Stack: PHP LARAVEL, MariaDB,ReactJs, AWS (SQS, SNS, Lambda, COGNITO.) ARCHITECTURE MICROSERVICE DDD – TDD – BEHAT, , SWAGGER, OPENAPI API/REST development with laravel of the following services : - Wallet-service - Voucher-service - ExchangeRate-service - Transaction-service - KYC service integration - Fees service management

TSI Payment is one of the very first French FinTechs with more than 14 years of experience and innovation in the field of payments and electronic money offering a full range of payment solutions to respond to clients needs: e-money (creation, distribution, and consumption), payment services (acceptance, processing, and acquiring), and cross-channel marketplace payments (pay-in, pay-out, commissions online/offline). The extent of TSI range of services offers the most comprehensive set of solutions, offering a unique single point of contact for merchants. Refonte du service payment-service de Paiement CB (Carte Bancaire) :SYMFONY Etude et implémentation de Passerelle de paiement (Checkout) :LARAVEL Evolution solution monitoring (Watcher service) : LARAVEL Etude et implementation du service notification-service : PYTHON-SERVELESS - KYC service integration - Fees service management - Payment gateway service