👨‍💻 Saif Eddine Layouni

Junior Middleware & Integration Engineer | WSO2 MI, APIM, IS | Spring Boot | Angular | Kubernetes | Telecom Use Cases

🎯 Passionate about system integration, full-stack solutions, and cloud-native architectures — especially for telecom and enterprise environments.

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🧠 About Me

🔹 Junior Integration Consultant working hands-on with WSO2 products:
 • Micro Integrator (MI) – mediation, orchestration, logging
 • API Manager (APIM) – API publishing, security policies
 • Identity Server (IS) – SSO, token introspection, OAuth2

🔹 Experience with full-stack apps using Spring Boot (backend) and Angular (frontend)
🔹 Strong DevOps culture: Kubernetes, Docker, Prometheus, Grafana
🔹 Focused on telecom use cases: eSIM, VoLTE, Entitlement, NSX, DSG

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🚀 Use Cases & Workflows

Use Case	Description
🛰 eSIM Transfer	Validate IMSI/token/correlation ID + call OSS backend via WSO2 MI
📡 VoLTE	Diameter authentication + provisioning via DSG/HSS
📲 Baseline Entitlement	Logger API, device validation (Apple/Android) + OAuth2/mTLS via IS
🔄 Carrier Auth	Token introspection via WSO2 Identity Server to extract IMSI
⚙️ Workflow Automation	Airflow pipeline to rotate logs, track KPIs, and generate daily reports

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🧰 Technologies

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📜 Certifications

• ✅ WSO2 Certified Micro Integrator - V4
• ✅ Apache Airflow Fundamentals – Astronomer
• ✅ PingCAP TiDB Practitioner
• ✅ Oracle Cloud Infrastructure AI Foundations
• ✅ APIsec University Ambassador
• ✅ Scrum Fundamentals Certified

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📌 Real production architecture with telecom-grade components:

• API Gateway: WSO2 APIM
• Mediation Layer: WSO2 Micro Integrator
• Authentication & Token Validation: WSO2 Identity Server
• Load balancing via F5, secure transport with mTLS
• Interaction with Entitlement Server, HSS, DSG, OSS

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💼 Projects

• 🛰 Telecom PoCs: eSIM Transfer, Watch Entitlement, VoWiFi, API Logger
• 📦 Full Stack Development: Node.js/PostgreSQL backend + Angular/Spring Boot frontend
• 📈 Observability & Analytics: WSO2 logs → SQL DB → Grafana dashboards
• ☸️ Kubernetes Deployments: WSO2 stack with HAProxy & Prometheus
• 🔄 Airflow Workflows: Log management, alerting, automation

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🔗 Useful Links

• 🔹 GitHub
• 🔹 LinkedIn
• 🔹 Airflow Certification
• 🔹 TiDB Certification

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📩 Let's Connect

If you're building APIs, securing telecom services, or deploying middleware in the cloud — feel free to reach out:

📧 saiflayouni77@gmail.com
📍 Tunis, Tunisia
🔗 linkedin.com/in/saifeddinelayouni

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🛠️ Additional Skills

• Languages: Java, Python, SQL, JavaScript, Bash
• Middleware & APIs: WSO2 MI / APIM / IS, Swagger, Postman
• Cloud & DevOps: Docker, Kubernetes, GitHub Actions, Jenkins
• Monitoring: ELK, Prometheus, Grafana
• Databases: PostgreSQL, MySQL, MongoDB, TiDB
• Frontend/Backend: Angular, React, FastAPI, Spring Boot