Senior Java Backend Developer

Location: Egypt - Cairo
Job Type: Full Time 

Position Overview

We are seeking an experienced Senior Java
Backend Developer to join our dynamic engineering team working on a
high-concurrency IoT PaaS platform. This role requires a technical leader who
can design and develop scalable backend systems for IoT data collection,
processing, and analysis while mentoring junior developers and collaborating
cross-functionally to deliver robust enterprise solutions.

Key Responsibilities

• Develop and maintain high-concurrency IoT PaaS services using
  SpringBoot framework
• Design and implement IoT data collection endpoints for various
  communication protocols (TCP, UDP, MQTT, HTTP)
• Build scalable data consumption and analysis endpoints for
  real-time IoT data processing
• Create robust data push endpoints and business-side APIs for
  seamless integration
• Develop audio/video alarm file services and streaming media
  components
• Design loosely coupled architecture with protocol-specific
  device access components
• Write protocol decoders following predefined rules for new IoT
  device integrations
• Implement webhook and OpenAPI methods for third-party platform
  integration
• Optimize system performance for high-throughput IoT data
  scenarios
• Conduct comprehensive code reviews and provide technical
  mentorship
• Collaborate with frontend developers, DevOps engineers, and
  product managers
• Lead backend architecture decisions and technical initiatives
• Implement comprehensive testing strategies and monitoring
  solutions
• Champion development best practices and coding standards
• Participate in agile development processes and sprint planning

Required Qualifications

Experience & Education

• Bachelor's degree in Computer Science, Software Engineering, or
  related field, or equivalent experience
• 7+ years of professional Java backend development experience
• Proven track record of building high-concurrency distributed
  systems
• Experience working in agile development environments
• Experience in a senior or lead developer role

Technical Skills

• Expert proficiency in Java (Java 8+) and Spring ecosystem
  (SpringBoot, Spring MVC, Spring Security)
• Strong experience with Netty framework for network programming
  and protocol handling
• Proficiency with message queue systems (RabbitMQ, Apache Kafka)
• Experience with Redis for caching and session management
• Knowledge of MongoDB for document-based data storage
• Proficiency with MySQL and relational database design
• Understanding of IoT communication protocols (TCP, UDP, MQTT,
  HTTP, WebSocket)
• Experience with RESTful API design and OpenAPI specifications
• Knowledge of webhook implementation and third-party system
  integration
• Familiarity with streaming media protocols and audio/video
  processing
• Experience with version control systems (Git) and collaborative
  workflows
• Understanding of microservices architecture and distributed
  systems

Core Competencies

• Exceptional problem-solving abilities and analytical thinking
• Strong attention to detail and commitment to code quality
• Excellent communication and mentorship skills
• Ability to translate business requirements into scalable
  technical solutions
• Strong collaborative mindset and cross-functional teamwork
• Experience with high-concurrency and high-availability system
  design

Preferred Qualifications

• Experience with Docker and Kubernetes for containerized
  deployments
• Knowledge of Linux/Ubuntu server administration and deployment
• Familiarity with Apache Kafka or other distributed streaming
  platforms
• Experience with Elasticsearch for log analysis and search
  capabilities
• Knowledge of time-series databases (InfluxDB, TimescaleDB)
• Understanding of IoT device management and protocol translation
• Experience with real-time data processing frameworks (Apache
  Storm, Apache Flink)
• Familiarity with monitoring tools (Prometheus, Grafana, ELK
  stack)
• Knowledge of security best practices for IoT systems
• Experience with CI/CD pipelines and DevOps practices
• Contribution to open-source Java projects
• Experience with cross-platform deployment scenarios

What We Offer

• Competitive salary package
• Comprehensive health insurance
• Professional development opportunities
• Collaborative and innovative work environment
• Opportunity to work on cutting-edge IoT platform serving
  millions of devices
• Exposure to latest technologies in IoT and distributed systems

Application Process

Please submit your resume along with a
portfolio or GitHub profile showcasing your Java backend projects, including
examples that demonstrate your expertise with distributed systems, IoT
protocols, and high-concurrency applications. Include links to live
applications or services you've built and any contributions to Java/IoT
community projects.