Job Description:

We are seeking a highly skilled Java Developer to join our dynamic team. The ideal candidate will have a strong background in Java programming, along with experience in working with various technologies including JSMPP, Redis, MySQL, Linux, RabbitMQ, Celery, Apache, and Docker/Kubernetes. This role requires an individual who is proficient in developing robust, scalable, and efficient applications and can seamlessly integrate multiple systems.

Responsibilities:

• Craft and implement the architecture for the backend of our messaging platform, focusing on modularity, scalability, and maintainability.
• Integrate and manage SMS gateways using SMPP and JSMPP.
• Develop unit tests and perform thorough testing of the backend components to ensure reliability and performance.
• Debug and resolve any issues that arise during the development and testing phases.
• Establish and manage SMPP connections to various SMS gateways.
• Implement logic for sending and receiving SMS messages through SMPP connections.
• Ensure that messages are correctly formatted, encoded, and decoded according to SMPP specifications.
• Develop robust error-handling mechanisms to manage issues such as message delivery failures, connection timeouts, and protocol errors.
• Implement retry logic and fallback strategies to ensure high message delivery success rates.
• Design and implement solutions to scale the messaging platform to handle increasing volumes of SMS traffic.
• Conduct load testing and performance benchmarking to identify bottlenecks and optimize system performance.
• Use tools and techniques to simulate high-traffic scenarios and ensure the platform can handle peak loads.
• Monitor and manage system resources, such as CPU, memory, and network bandwidth, to ensure efficient utilization and prevent resource exhaustion.
• Conduct post-incident analysis to identify improvements and prevent recurrence.
• Proactively identify areas for improvement in the backend systems and SMPP integrations.
• Implement enhancements and optimizations to improve reliability, performance, and maintainability.

Education Required:

• Bachelor's degree in Computer Science, Software Engineering, or a related field.

Requirements:

• Minimum of 2 years of professional experience in SMS messaging with Java, specifically using the Java-smpp library.
• Understanding and knowledge of the SMPP protocol and experience with SMPP client and server implementations is a plus.
• Utilize JSMPP (Java SMPP) for additional integration and functionality.
• Expertise in HTML, CSS, JavaScript.
• Experience with RESTful APIs and web services.
• Familiarity with Celery and Apache.
• Proficiency in JSMPP (Java SMPP) and its applications in SMS messaging.
• Experience with the Spring Framework (Spring Boot, Spring MVC, Spring Security, Spring Data).
• Familiarity with message queuing systems and databases (e.g., RabbitMQ, Redis, MySQL).
• Excellent problem-solving skills and the ability to troubleshoot complex issues related to messaging systems.
• Hands-on experience with Object-Oriented Programming (OOP) concepts.
• Proficiency with Data Types, Variables, and Operators.
• Strong verbal and written communication skills, with the ability to explain technical concepts to non-technical stakeholders.
• Ability to work effectively in a collaborative team environment.
• In-depth knowledge of SMS messaging protocols and standards.
• Experience with cloud platforms (e.g., AWS, Google Cloud) and containerization (e.g., Docker, Kubernetes).