Requirements

Key
Responsibilities

• Design and develop scalable
  RESTful APIs using Java, Spring Boot, and Hibernate/JPA for IMPS,
  AePS, and NETC applications
  
• Build and maintain microservices-based
  architectures, integrating with internal and external payment systems
  
• Develop responsive,
  high-performance frontend applications using React.js, Redux, and
  JavaScript / TypeScript
  
• Ensure seamless frontend–backend
  integration for real-time payment workflows
  
• Work with event-driven
  systems (Kafka) for asynchronous transaction processing
  
• Implement secure
  authentication and authorization using OAuth2, JWT, and industry best
  practices
  
• Optimize applications for performance,
  scalability, reliability, and security
  
• Write unit and
  integration tests, and participate in code reviews to maintain
  engineering standards
  
• Actively participate in Agile
  ceremonies and collaborate with cross-functional teams
  

Key
Skills & Experience Required

• Strong expertise in Java
  8+ and above, including core programming constructs such as streams,
  collections, multithreading, concurrency, and functional programming,
  along with a working understanding of JVM internals such as memory model,
  garbage collection, and class loading
  
• Hands‑on experience with Spring
  Boot and backend frameworks, including dependency injection, REST API
  development, exception handling, and microservices-based application
  design
  
• Solid understanding of modern
  frontend development, with React.js, Redux, and TypeScript, including
  component architecture, hooks, state management, and efficient API
  integration patterns
  
• Familiarity with Node.js-based
  middleware concepts, including event loop behavior, non‑blocking I/O,
  and lightweight service orchestration
  
• Experience working with microservices
  and distributed systems, including REST API principles such as
  idempotency, API versioning, request validation, and error modeling
  
• Strong knowledge of event-driven
  architecture and messaging systems like Kafka, including topics,
  partitions, consumer groups, and asynchronous processing patterns
  
• Experience with SQL and
  NoSQL databases, including relational modeling, transactions,
  indexing, as well as NoSQL data modeling for scalability and performance
  
• Understanding of caching
  strategies using Redis or similar systems, including cache-aside
  patterns, TTL, and eviction policies
  
• Knowledge of authentication
  and security mechanisms, including OAuth2, JWT, secure API handling,
  and input validation
  
• Good understanding of system
  design principles, including SOLID principles, layered architecture,
  and commonly used design patterns such as Factory, Strategy, and Proxy
  
• Exposure to DevOps
  practices, including version control (Git), build tools
  (Maven/Gradle), and environment-based configuration management
  
• Awareness of observability
  practices, including structured logging, metrics monitoring, and
  debugging production issues
  
• Strong problem-solving,
  analytical, and communication skills, with the ability to work
  independently and in cross-functional Agile teams
  

Good to
Have Skills and Experience

• Experience deploying
  applications on cloud platforms such as AWS, Azure, or GCP
  
• Exposure to CI/CD
  pipelines using Jenkins, GitLab CI, or GitHub Actions
  
• Knowledge of containerization
  and orchestration using Docker and Kubernetes
  
• Familiarity with high-availability,
  low-latency systems, particularly in financial or payment processing
  domains
  

Benefits