Senior Java Backend Developer

Job Overview

We are looking for a Senior Java Backend Developer to design, develop, and maintain scalable backend systems focused on high-volume transaction processing and payment gateway integrations for an international audience. This role requires building secure, high-performance APIs and robust backend services using event-driven and asynchronous processing paradigms.

Responsibilities

• Create and maintain backend systems that effectively handle large-scale transactions and integrate with multiple payment gateways.
• Develop secure APIs for seamless integration with internal and external systems.
• Follow engineering best practices by writing clean, maintainable, and testable code.
• Participate in architectural design to build scalable, fault-tolerant solutions.
• Implement event-driven and asynchronous backend processing methods.
• Support platform integrations across diverse internal and external services.
• Design and implement message-driven systems using enterprise messaging technologies.
• Optimize performance at application, database, and service levels.
• Conduct load and performance testing to identify and resolve bottlenecks.
• Troubleshoot and analyze production issues thoroughly to determine root causes.
• Ensure system robustness and stability under high-throughput conditions.
• Collaborate closely with DevOps teams to implement and maintain CI/CD pipelines.
• Manage build, deployment, and release workflows across multiple environments.

Candidate Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related discipline.
• Between 6 and 9 years of professional experience in Java backend development.
• Expertise in Java 8 and above, with preference for experience using Java 21 and Spring Boot framework.
• Demonstrated proficiency in microservices, event-driven architectures, and RESTful API development.
• Hands-on experience with enterprise messaging systems, ideally Solace.
• Advanced skills in MySQL, including aspects like indexing, query optimization, and database tuning.
• Experience using unit testing frameworks such as JUnit and Mockito.
• Familiarity with build and version control tools including Maven, Git, Jira, and Jenkins for CI/CD processes.
• Background in load and performance testing with emphasis on backend optimizations.
• Strong troubleshooting and debugging skills particularly with live production environments including root cause analysis.
• Industry experience in e-commerce, banking, or domains involving high-volume transaction processing is highly desirable.
• Proven ability in building distributed, highly available, and scalable systems.
• Experience in managing real-time and performance-critical backend services.
• Capability to handle production support and effectively manage critical incidents.