Senior Java Developer

Description :We are seeking a highly skilled Senior Java Developer with strong expertise in the payments domain to design, develop, and optimize high-performance, scalable payment processing solutions.The ideal candidate should have hands-on experience with modern Java frameworks, microservices architecture, real-time transaction processing, and integration with financial systems.You will work closely with product owners, architects, and cross-functional teams to enhance payment capabilities, ensure compliance, and deliver seamless customer experiences across digital channels.Key Responsibilities :1. Application Development :- Design, develop, and maintain Java-based microservices for payment processing workflows.- Build highly available, low-latency, and scalable systems for real-time transaction processing.- Implement payment features such as authorization, settlement, reconciliation, refunds, chargebacks, etc.- Develop RESTful APIs for internal and external integrations (banks, gateways, partners).2. Payments Domain Expertise :- Work on payment rails such as UPI, IMPS, NEFT, RTGS, SWIFT, Cards, or global payment networks.- Implement payment security standards : PCI-DSS, tokenization, encryption, fraud checks.- Support compliance requirements and regulatory updates (RBI, ISO 20022, scheme mandates).- Integrate with payment gateways, processors, and third-party financial services.3. Architecture & Design :- Contribute to system design, architectural improvements, and technical roadmaps.- Work with event-driven architecture using Kafka/RabbitMQ.- Implement and optimize distributed systems and cloud-native architectures.- Create detailed design documents, sequence diagrams, and interface specifications.4. Performance & Quality :- Conduct code reviews and enforce engineering best practices.- Optimize system performance, scalability, and memory utilization.- Ensure high code quality through unit testing, integration testing, and automation.- Support production systems, troubleshoot complex issues, and provide root cause analysis.5. Collaboration & Leadership :- Mentor junior developers and support team members in problem-solving.- Work with product, QA, DevOps, and architecture teams to deliver end-to-end solutions.- Participate in sprint planning, estimation, and agile ceremonies.- Coordinate with external vendors and financial partners for integrations.Technical Skills Required Skills :- Strong proficiency in Java 8/11/17.- Hands-on experience with Spring Framework, Spring Boot, Spring MVC, Spring Security.- Expertise in Microservices Architecture.- Knowledge of Payment APIs, transaction workflows, and real-time systems.Integration & Messaging :- Experience with REST APIs, SOAP services.- Working knowledge of Kafka, RabbitMQ, JMS.- Knowledge of API Gateways and service registries.Databases :- Proficiency in SQL and NoSQL databases (Oracle, MySQL, Postgres, MongoDB, Cassandra, Redis).Additional Good-to-Have :- Exposure to ISO 8583, ISO 20022 messaging formats.- Experience with card processing systems, POS, or wallet solutions.- Knowledge of event sourcing and CQRS patterns.- Understanding of security protocols: OAuth2.0, JWT.Soft Skills :- Strong analytical and problem-solving skills.- Excellent communication and documentation abilities.- Ability to work in a fast-paced, high-compliance environment.- Ownership mindset and proactive approach.Qualifications :- Bachelors or Masters degree in Computer Science, Engineering, or related field.- 6- 10 years of hands-on Java development experience.- Payments domain experience (mandatory) (ref:hirist.tech)