We are seeking an experienced Principal Software Engineer with 12–18 years of hands‑on expertise in Java/J2EE, REST/SOAP, JPA, Oracle/PostgreSQL, and modern messaging platforms such as Kafka and other Message Queues. The ideal candidate will be responsible for designing scalable enterprise payments applications, guiding junior developers, and driving solution excellence across projects.
Design, develop, and maintain high‑performance, scalable enterprise applications using Java/J2EE.
Architect and implement RESTful and SOAP-based web services.
Design and optimize relational database structures and queries (Oracle/PostgreSQL).
Work extensively with JPA/Hibernate for ORM and data persistence.
Develop distributed, event-driven systems using Kafka or other messaging platforms.
Implement asynchronous processing models, message queues, and event-streaming pipelines.
Lead code reviews, ensure code quality standards, and mentor junior engineers.
Collaborate with cross-functional teams including architects, DevOps, QA, and product owners.
Troubleshoot complex issues across application layers, performance tune, and improve system reliability.
Contribute to system design discussions,



architecture decisions, and technical roadmaps.
Bachelor’s or Master’s degree in Computer Science, Information Technology, or related field.
Solid communication and documentation skills.
Ability to lead technically and collaborate effectively.
Ownership mindset and ability to work independently.
Mentoring and team leadership capabilities.
Positive understanding of Payments and Banking domain.
Strong proficiency in Java/J2EE , multithreading, collections, and design patterns.
Hands‑on experience with REST API development and SOAP services.
In‑depth knowledge of JPA , Hibernate, or other ORM frameworks.
Strong database experience with Oracle and/or PostgreSQL including SQL, PL/SQL, indexing, performance tuning.
Experience with Kafka , RabbitMQ , ActiveMQ , or other messaging systems.
Solid understanding of microservices architecture and distributed systems.
Familiarity with CI/CD tools (Jenkins, GitLab CI, etc.).
Experience with application servers (WebLogic, JBoss, Tomcat).
Solid analytical, debugging, and problem‑solving skills.

📌 Principal Development Engineer Mumbai
🏢 Diebold Nixdorf
📍 Mumbai