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.

Industry field of expertise

Languages

Arabic
Native or bilingual
German
Fluent
English
Fluent
French
Basic

Workplace preferences

Can work on-site

Frankfurt am Main (up to 50km)

Generali Frankfurt AG
Senior Software Engineer – Policy Management Software
February 2024 - April 2025 (1 year and 2 months)
• 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
January 2023 - December 2023 (11 months)
• 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 –
May 2023 - August 2023 (3 months)
• 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