Description

"Turning complexity into clarity. Designing value-driven digital solutions."

My name is Younes El Mestari, and I help companies build reliable, scalable, and intelligent software systems that solve real business problems. With over 20 years of experience as a Tech Lead, Fullstack Engineer, and AI Solution Architect, I combine deep technical skills with structured thinking and a passion for clean, effective software design.

Clients appreciate my ability to translate complex requirements into well-structured, secure, and scalable systems. I work across industries—from startups to enterprise clients—offering a calm, professional, and delivery-focused mindset.

🔹 What I do best:

Fullstack development (Java, Spring Boot, Vue.js, TypeScript)

Microservices, RESTful APIs, DevOps (Kubernetes, GitLab CI/CD)

Process modeling with BPMN, Camunda, Enterprise Architect

AI-driven automation with LLMs, agents (OpenAI, Claude, LangChain)

Architecture consulting aligned with GDPR, ISO27001, and AI governance

🔹 Why clients choose me:

I understand both technology and business logic

I deliver on time, with structure, integrity, and communication

I’m hands-on from concept to deployment & maintenance

I work with passion, empathy, and long-term vision

👉 Looking for someone who combines engineering expertise with clarity, structure, and a proactive mindset? Let’s build something great together.

Domaines d’expertise

Langues

Arabe
Bilingue ou natif
Allemand
Capacité professionnelle complète
Anglais
Capacité professionnelle complète
Français
Notions

Préférences en matière de lieu de travail

Accepte de travailler sur site

Frankfurt am Main (jusqu’à 50 km)

Generali Frankfurt AG
Senior Software Engineer – Policy Management Software
février 2024 - avril 2025 (1 an et 2 mois)
• Development and maintenance of programs within the policy management system KollVWS.
• Design and implementation of future-oriented web-based systems using Vaadin.
• Collaborate with business designers, developers, and testers on the evolution of the KollVWS policy management system.
• Technically contribute to the design of a new, web-based insurance platform using Java, Vaadin, Kafka, and Spring Boot
• Participation in sprint planning and backlog grooming with development teams.
• Evaluate architectural options and ensure compatibility with legacy Spring-based microservices.
• Support CI/CD rollouts and manage operational incident resolution and bug fixing.
• Interface with business analysts to convert business logic into technical implementations.
• Address compliance and GDPR-related implementation questions for insurance process automation.
• Oversaw technical QA and testing routines using JUnit, Mockito, and Groovy
• Support and resolution of production errors, liaison for operational incidents.
• Joint conceptual work with business departments and design teams.
Private Clients
Microservices Development and Management
janvier 2023 - décembre 2023 (11 mois)
• Led development of secure REST/JMS modules, data integration and performance testing.
• Technical documentation in Confluence.
• Sprint planning, release management in CI/CD pipelines, ensured data privacy compliance.
• Design and development of service-oriented applications.
• Business process automation and database migration from third party application.
• Conceptualization of microservice architecture, OpenAPI documentation. Security implementations using JWT, API integrations for migration.
LDI / T-Systems
Senior Fullstack Developer –
mai 2023 - août 2023 (3 mois)
• Technical Support for implementing OZG-compliant digital form applications under German environmental law.
• Architect and guide modular frontend structure using Vue3 with Quasar and backend microservices in Spring Boot.
• Support sprint planning, task management, and release coordination in a Scrum-based agile development team.
• Integrate complex interfaces such as ELSTER IdP (SAML2), Keycloak Clients (OIDC), CSV/XML file upload, REST APIs.
• Design secure authentication/authorization mechanisms using Keycloak and OAuth2 standards.
• Responsible to continue building and maintaining CI/CD pipelines, container orchestration via Docker, Kubernetes, Helm, Rancher.
• Defined and monitored testing strategies: unit tests, end-to-end tests with Cucumber, Vitest, TestContainers.
• Active participation in team retrospectives and quality assurance processes (code reviews, clean code practices).
• Responsible support as technical interface for DB architecture (PostgreSQL, Oracle), infrastructure, and DevOps engineers.

Technologies

Java 17, Oracle DB, Spring Boot, Vue.js TypeScript, REST/JSON, SOAP, JAXB, Git, Docker, JUnit, Mockito, Cucumber, Postgres, SonarQube