Senior Java Developer

Senior Backend Engineer will be responsible for architecting and developing the backend systems that power our Ecommerce payment gateway (NGenius Online). Will work collaboratively with cross-functional teams, including frontend developers, product managers, and DevOps engineers, to ensure the robustness, scalability, and security of our backend infrastructure.

Responsibilities

• Lead the design, development, and maintenance of the backend systems that drive our Ecommerce payment gateway, ensuring high performance and scalability.
• Utilize strong knowledge of MongoDB and MySQL to design efficient and reliable database schemas, optimize queries, and maintain data integrity.
• Create and maintain micro services using Java, adhering to best practices in software design and development.
• Work with cloud platforms (e.g., AWS, Azure) to deploy and scale backend services, utilizing cloud-based technologies such as server less computing and containerization.
• Implement security best practices, encryption, and access controls to ensure the security and compliance of our payment gateway backend.
• Mitigate vulnerabilities in codebase, plan and implement versions migration of the system parts.
• Continuously monitor and optimize backend performance, identifying and addressing bottlenecks and improving response times.
• Investigate and resolve backend-related issues, collaborating with DevOps and frontend teams as necessary.
• Participate in code reviews, mentor junior engineers, and uphold high code quality standards.
• Maintain thorough technical documentation for backend systems, APIs, and micro services to facilitate collaboration and knowledge sharing.

Qualifications

• Bachelor's degree in computer science (software / application) or equivalent
• Minimum of 6+ years of relevant experience
• Strong knowledge of MongoDB and MySQL database systems.
• Enterprise experience with the following Java based frameworks: Spring-framework, Spring-boot, Spring-cloud, Quarkus.
• Experience with microservices architecture and design patterns.
• Experience in Keycloak, OAuth2.0, OpenID, and streaming platforms (Eg: Kafka, Azure Events Hub etc.)
• Working knowledge of cloud platforms (e.g., AWS, Azure) and containerization technologies (e.g., Docker, Kubernetes, Helm chart).
• Familiarity with security standards, encryption, and access control.
• Strong knowledge of HTTP, XML, REST, SOAP, Web Services, SOAP UI, WSDL is must.
• Excellent problem-solving skills and the ability to work collaboratively in a fast-paced environment.
• Strong knowledge of APIs, MicroServices, SOA concepts, WSDL, schemas, RESTful JSON services
• Familiarity with monitoring tools like Kibana or Grafana for system monitoring and performance analysis.
• Writing and executing unit tests using JUnit to ensure code quality and reliability.
• Functional knowledge in the financial/banking domain is a plus.