Senior Backend Developer - Java (Work from Home)

Hammerjack Pty Ltd

📍 España, Romblon, Philippines

Full-time IT & Technology Posted February 27, 2026

Job Description

Specific Duties And Responsibilities

  • Develop, enhance, and maintain backend services and APIs using Java 21, Spring Framework 5/6, and Spring Boot 3/4, following industry best practices.
  • Design, implement, and document RESTful APIs, ensuring reliable integration with downstream and upstream systems.
  • Build and maintain event‑driven and streaming solutions using Apache Kafka, including Kafka Streams for real‑time data processing and Kafka Connect for system integration.
  • Ensure service interoperability and standardization by implementing TMF Forum OpenAPI specifications for service, data, and process modeling.
  • Work extensively with containerized applications, leveraging Docker and deploying to OpenShift platforms in cloud‑native environments.
  • Design, develop, and optimize database schemas and queries using PostgreSQL, including performance tuning and index optimization.
  • Deploy and manage applications in Goog...