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.
🔹 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
| 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 |
- ✅ WSO2 Certified Micro Integrator - V4
- ✅ Apache Airflow Fundamentals – Astronomer
- ✅ PingCAP TiDB Practitioner
- ✅ Oracle Cloud Infrastructure AI Foundations
- ✅ APIsec University Ambassador
- ✅ Scrum Fundamentals Certified
📌 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
- 🛰 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
If you're building APIs, securing telecom services, or deploying middleware in the cloud — feel free to reach out:
📧 [email protected]
📍 Tunis, Tunisia
🔗 linkedin.com/in/saifeddinelayouni
🛠️ 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