Senior Java & IoT Back-end Developer

About the role

We are looking for an experienced Senior Java Backend Developer to join our engineering team in Cairo. You will lead the design and development of a high‑concurrency IoT PaaS platform, delivering scalable services for data collection, processing, and analysis.

Key responsibilities

• Develop and maintain high‑concurrency IoT services using SpringBoot.
• Design data collection endpoints for TCP, UDP, MQTT, HTTP protocols.
• Build real‑time data consumption and analysis pipelines.
• Create robust push APIs and business‑side integration services.
• Develop audio/video alarm file services and streaming components.
• Design loosely coupled architecture with protocol‑specific device access.
• Write protocol decoders for new IoT device integrations.
• Implement webhook and OpenAPI methods for third‑party integration.
• Optimize performance for high‑throughput IoT scenarios.
• Conduct code reviews, mentor junior developers, and lead architecture decisions.
• Collaborate with frontend, DevOps, and product teams in agile sprints.

Required profile

• Bachelor's degree in Computer Science, Software Engineering or equivalent.
• 7+ years of professional Java backend development experience.
• Proven experience building high‑concurrency distributed systems.
• Previous senior or lead developer role in an agile environment.
• Strong problem‑solving, communication and mentorship abilities.

Required skills

• Java (Java 8+) and Spring ecosystem (SpringBoot, Spring MVC, Spring Security).
• Netty framework for network programming.
• Message queues: RabbitMQ, Apache Kafka.
• Redis for caching and session management.
• MongoDB and MySQL database expertise.
• Understanding of IoT protocols: TCP, UDP, MQTT, HTTP, WebSocket.
• RESTful API design and OpenAPI specifications.
• Webhook implementation and third‑party integration.
• Streaming media protocols and audio/video processing.
• Git version control and collaborative workflows.
• Microservices architecture and distributed systems concepts.