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

- Strong 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.

Disclaimer: This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.

📌 Java Developer_AppInventis (Noida)
🏢 Velocitai Digital
📍 Noida