Key Responsibilities

- Design, develop, and maintain backend services and APIs using Java and Spring Boot.

- Build, integrate, and optimize payment gateway and payment processor workflows, including

authorization, capture, settlement, refunds, chargebacks, and reconciliation.

- Own payment processing logic, ensuring accuracy, security, and compliance (PCI-DSS

awareness).

- Design and optimize MySQL database schemas, queries, and transactions for high-throughput

payment data.

- Implement caching strategies using Redis to improve system performance and reduce latency.

- Build and maintain message queue-based asynchronous processing for reliable transaction

handling.

- Collaborate cross-functionally with Product, QA, DevOps, and Frontend teams to deliver features

within agreed timelines and sprint commitments.

- Troubleshoot and resolve production issues related to payment transactions, prioritizing reliability

and data integrity.

- Deliver clean, well-documented, and testable code adhering to engineering standards.

- Participate in code reviews, architecture discussions, and sprint ceremonies.

- Provide regular progress updates and deliverable tracking as required.

Required Qualifications & Skills

Experience

- 6 - 8 years of hands-on backend development experience in Java.

- Strong, demonstrable experience building and scaling payment processing systems.





- Extensive hands-on work with payment gateway and payment processor integrations.

Technical Skills

- Solid proficiency in Java (8/11) and Spring Boot (REST APIs, microservices architecture).

- Solid experience with MySQL schema design, query optimization, and transaction management.

- Hands-on experience with Redis for caching and performance optimization.

- Experience with message queuing systems (e.g., Kafka, RabbitMQ, ActiveMQ).

- Deep understanding of the payment transaction lifecycle: authorization, capture, void, refund,

settlement, and reconciliation.

- Working knowledge of PCI-DSS fundamentals, tokenization, and encryption practices.

- Experience with Git and CI/CD pipelines.

Preferred Skills

- Hands-on experience with the P97 payment processor.

- Hands-on experience with the Fiserv Datacap payment processing platform.

- Exposure to fuel, retail, or POS payment ecosystems.

- Familiarity with containerization (Docker/Kubernetes) and cloud platforms (AWS/Azure/GCP).

Soft Skills

- Ability to ramp up quickly and work independently within a defined scope and timeline.

- Solid communicator, comfortable working with distributed and/or client-facing teams.

- Detail-oriented, with a strong sense of accountability for deliverables under contract terms.

- Adaptable to changing priorities within project/client constraints

📌 Senior Java Developer (Noida)
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