Zakaria El Hayani

Senior Full Stack Developer with 17 years of experience, expert in Java/Spring Boot and Angular. Specialized in microservices architecture, REST API development, and scalable enterprise applications. Strong expertise in SQL and Data Engineering, with emerging skills in Big Data (Spark, Kafka) and Artificial Intelligence (RAG, MCP Server/Client, AI agents, chatbots).

🎯 TECHNICAL EXPERTISE

Architecture & Backend

- Microservices with Spring Boot/Cloud/Security, secure REST/GraphQL APIs

- Agent systems (MCP), advanced patterns (DDD, Clean Architecture, CQRS, API Gateway)

- Event-Driven Architecture with Apache Kafka (real-time streaming, high volume)

Big Data & Analytics

- Apache Spark pipelines (Spark SQL, Streaming) on distributed clusters (HDFS, Parquet)

- Data Lake architecture, Spark performance optimization

- Stack: Elasticsearch, PostgreSQL, MongoDB, Redis

DevOps & Cloud Native

- Kubernetes orchestration, Docker containerization, Helm

- CI/CD: GitLab CI, Jenkins, ArgoCD

- Observability: Prometheus, Grafana, ELK Stack

- AWS Cloud (EC2, S3, Lambda, EKS, RDS)

Frontend

- Angular 14-18, Vue.js 3+, TypeScript, RxJS

- Micro-frontend architecture, Material Design

💻 TECHNICAL STACK

Backend: Java 8-21 • Spring ecosystem • Kafka • Spark • Hibernate/JPA

Data: PostgreSQL • MongoDB • Redis • Elasticsearch • Cassandra

DevOps: Kubernetes • Docker • AWS • Terraform • GitLab CI • Jenkins

Monitoring: Prometheus • Grafana • ELK • Kibana

Frontend: Angular • Vue.js • PrimeNG, TypeScript • RxJS

Patterns: Microservices • Event-Driven • DDD • SOLID • TDD

🤝 CLIENTS

Société Générale • Renault • La Poste • Orange • Groupama • Hennessy • CAPDEEL • OXAND • EMERIA

My strength: combining technical excellence with business understanding. Pragmatic, maintainable, and scalable solutions that create real added value.