
Ismail OQAYL
Lead Java Developer | Payment Specialist
Salaire / Taux journalier
Île-de-France, France
Mobilité : Île-de-France
Freelance
Peut venir sur site
Expertises
Langues
À propos
Introduction
Lead Java Developer & Payment Specialist with 10+ years building high-performance, distributed systems in banking and fintech. Expert in modernizing legacy platforms to microservices architectures, reducing deployment time while scaling for high-traffic enterprise environments. Specialized in payment systems, fraud detection, and cloud-native solutions (Kubernetes/GCP) with proven success driving CI/CD excellence and system reliability.
Expérience de travail
Lead Java Developper - Payment Specialist
Sagilog
juin 2022 - Présent
4 ans 5 mois
Vétheuil, France
- Designed and developed large-scale, modern, distributed systems supporting end-to-end B2B business processes in a high-traffic enterprise environment. - Led the evolution toward a microservices architecture, modernizing legacy systems and ensuring clear service boundaries, scalability, and fault tolerance. - Drove CI/CD strategy and DevOps best practices, improving build, deployment, rollback, and release reliability across multiple environments. - Led source control and CI migration initiatives, standardizing development workflows and improving delivery efficiency. - Designed integration and routing solutions to ensure seamless communication between legacy platforms and modern event-driven systems. - Deployed and operated microservices on cloud-based Kubernetes platforms, focusing on high availability, resilience, and operational excellence. - Improved observability and monitoring, enabling faster root-cause analysis and significant performance and reliability gains. - Delivered performance optimizations at both application and data layers, improving throughput and scalability of critical services. - Conducted technical POCs to evaluate data storage and platform migration options based on performance, cost, and operational impact. - Kept platforms up to date with the latest Java and framework versions, introducing modern concurrency models to enhance scalability. - Introduced AI-assisted tools and intelligent agents to accelerate developer productivity and support product and business teams. - Automated delivery and operational tasks through scripting, ensuring consistency and reliability across all environments.
Tech Lead – Payment Specialist
Inetum
oct. 2021 - mai 2022
8 mois
Paris, France
- Maintained and developed system components for fraud detection, leveraging machine learning and big data approaches. - Participated in setting up and managing multiple environments to support data processing and analysis. - Collaborated closely with Data Scientists to identify and update key features impacting the detection of potentially fraudulent transactions. - Contributed to the continuous improvement of system components for enhanced accuracy and efficiency in fraud detection.
HPS
juil. 2016 - oct. 2021
5 ans 4 mois
Aix-en-Provence, France
Tech Lead – Payment Specialist
févr. 2020 - oct. 2021
1 an 9 mois
Aix-en-Provence, France
- Led the modernization of core payment systems, designing and implementing microservices architectures with distributed databases to ensure scalability and reliability. - Designed and implemented high-availability and disaster recovery strategies for critical data systems. - Improved corporate card functionalities and deployed services in cloud-based infrastructures for enhanced performance and availability. - Developed advanced indexing and search capabilities, significantly reducing response times across large-scale systems. - Managed migration and modernization of legacy platforms to modern frameworks and cloud-ready deployments, ensuring smooth transitions and system stability. - Created custom database upgrade tools to streamline schema evolution and support long-term system maintainability.
Senior Payment Specialist
juil. 2016 - mars 2020
3 ans 9 mois
Casablanca, Maroc
- Led the design and development of key components for integrating a payment platform into the broader banking ecosystem, ensuring end-to-end transaction processing reliability. - Developed advanced search and indexing features, significantly improving system response times. - Planned and executed migration of legacy payment systems to modern architectures and frameworks, ensuring continuity and stability. - Created custom database upgrade tools to streamline schema evolution and support long-term maintainability. - Oversaw implementation of scalable, reliable solutions across the payment system, enhancing operational efficiency and system performance.
Software Engineer
Sopra Banking Software
sept. 2015 - juil. 2016
11 mois
10046 Marocchi, Turin, Italie
- Designed and developed new functionalities to modernize and enhance core banking systems, supporting migration to modern architectures and technologies. - Implemented caching and database optimization strategies to improve performance and responsiveness of critical banking applications. - Led modernization initiatives including source control migration and tooling upgrades to streamline development workflows and improve operational efficiency. - Contributed to the development of scalable, high-performance APIs and services to support banking operations and credit management processes. - Delivered end-to-end solutions ensuring reliability, maintainability, and performance of core banking platforms.
Software Engineer
GIOPLEX
nov. 2014 - oct. 2015
1 an
Casablanca, Maroc
- Designed and developed a platform to streamline collaboration between agencies for vehicle rental and fleet tracking. - Implemented a CRM solution to manage rental contracts and customer relationships efficiently. - Developed a real-time vehicle tracking application using Java sockets to monitor cars in circulation. - Contributed to the evolution and enhancement of existing modules, improving system functionality and user experience. - Collaborated closely in a small team, ensuring timely delivery of high-quality software solutions.
Formation
Ecole Nationale Supérieure d'Informatique et d'Analyse des Systèmes - ENSIAS
Cycle d'ingénierie d'état en génie informatique, option génie logiciel
2011 - 2014
3 ans 1 mois
Université Hassan II Mohammedia
Licence d'Études Fondamentales, Mathématiques et informatique
2008 - 2011
3 ans 1 mois
Lycée Jaafar EL Fassi El Fihri
Baccalauréat Sciences Mathématiques, Sciences Mathématiques
2007 - 2008
1 an 1 mois
Licences et certifications
IBM Generative AI Engineering
Délivré le : déc. 2025
Generative AI Applications Specialist
Délivré le : déc. 2025
CKAD: Certified Kubernetes Application Developer
Délivré le : mars 2023
Oracle Certified Professional, Java SE 8 Programmer
Délivré le : avr. 2022
Oracle Certified Associate, Java SE 8 Programmer
Délivré le : déc. 2020
Devops jenkins
Délivré le : oct. 2020
Apache kafka
Délivré le : août 2020
Spring boot microservices & spring cloud
Délivré le : avr. 2020
Building Scalable Java Microservices with Spring Boot and Spring Cloud
Délivré le : mars 2020