We are looking for an experienced Spring Boot Java Developer to join our innovative IT team. The successful candidate will play a pivotal role in designing, building, and maintaining distributed systems with a focus on ensuring transactional integrity, performance, security, and reliability. The ideal candidate will be well-versed in managing complex backend services, handling large-scale transactions, and ensuring system robustness and availability in a distributed environment.

Key Responsibilities

• Transaction Management:
  • Implement and manage distributed transactions using Sagas for compensating transactions to maintain data consistency across services.
  • Handle transaction reconciliation to sync systems when third-party integrations or services go out of alignment.
• Error Handling:
  • Develop comprehensive error-handling mechanisms for system and business errors, including managing timeouts, delays, and transaction retries in distributed environments.
  • Define and implement error codes, status codes (such as HTTP codes for APIs), and employ standardised error formats (e.g., RFC7807).
  • Create automated and manual error resolution processes, ensuring proper logging for troubleshooting.
• Logging & Auditing:
  • Ensure detailed request and response logging for external/internal services, with debug and audit logs enabled where necessary.
  • Incorporate performance logging and error tracking with detailed contextual information for diagnostics.
• Data Modelling:
  • Develop and maintain canonical data models, ensuring consistency across integrations and services.
  • Handle complex data transformations and ensure efficient tracking with message headers (context IDs) for monitoring and troubleshooting.
• Validation:
  • Enforce business validations at appropriate application layers, particularly within APIs to ensure the integrity of business logic.
• Security:
  • Implement robust authentication and authorisation protocols, handling system IDs, tokens, and human credentials securely.
  • Ensure adherence to industry-standard security best practices for distributed systems.
• Business Logic & Rules:
  • Define and enforce critical business rules and logic within the service layer to ensure smooth service operation.
• Monitoring & Alerting:
  • Set up and maintain monitoring systems, including real-time alerts for system issues or performance bottlenecks.
• Caching:
  • Implement and manage efficient caching strategies to improve performance and reduce system load.
• Batch Processing & Scheduling:
  • Design and manage batch jobs, scheduling processes with enterprise-grade scheduling tools to ensure timely data processing and system integrity.
• Message Ordering:
  • Ensure correct message ordering in distributed environments to avoid concurrency issues and ensure data consistency.
• Date & Time Management:
  • Handle complex date and time calculations, ensuring consistency across all services by centralising date/time processing.
• Service Availability (24x7):
  • Ensure high availability of services to handle client transaction requests and maintain operations, even during backend downtime or failures.

Qualifications & Experience

• Proven experience as a Spring Boot Java Developer, with a strong focus on distributed systems.
• Hands-on experience managing distributed transactions, error handling, data modelling, and system security.
• Strong background in designing and implementing robust monitoring, reconciliation, caching, and batch processing solutions.
• Ability to ensure high system availability and manage complex transaction flows in a cloud-based or hybrid environment.
• Exceptional problem-solving skills and a strong focus on optimising system performance and security.

Preferred Skills

• Experience working with Sagas or similar frameworks for compensating transactions.
• Hands-on knowledge of reconciliation processes and tools for transactional sync.
• Familiarity with standard error handling frameworks (e.g., RFC7807).
• Proficiency with enterprise scheduling and batch processing tools.

Technical Skills

• Java Programming: Strong proficiency in Java, including core language features, data structures, algorithms, and multi-threading.
• Spring Ecosystem: In-depth expertise in Spring Boot, Spring Batch, Spring Data, Spring MVC, and Spring Security.
• Microservices Architecture: Strong understanding of microservices architecture and design patterns.
• RESTful APIs: Experience designing, exposing, and consuming RESTful web services.
• Database Expertise: Proficiency with JPA/Hibernate for database interaction and a deep understanding of SQL.
• DevOps Tools: Experience with Docker, Kubernetes, Maven, Gradle, and other CI/CD tools.
• Testing & Quality: Strong experience with unit testing frameworks such as JUnit and Mockito, ensuring high-quality code through test automation.