HiringCafe
Posted 3mo ago

Senior Backend Developer - Java (Work from Home)

@ Quantrics
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Manila, Manila, Philippines
RemoteFull Time
Responsibilities:Develop backend, Design APIs, Implement Kafka
Requirements Summary:Senior backend developer with strong Java/Spring experience, microservices, Kafka, Docker/OpenShift, PostgreSQL/Oracle, GCP, TMF OpenAPI, and CI/CD; plus testing and observability.
Technical Tools Mentioned:Java, Spring, Spring Boot, Apache Kafka, Kafka Streams, Kafka Connect, Docker, OpenShift, PostgreSQL, Oracle PL/SQL, NoSQL, TMF OpenAPI, ElasticSearch, Grafana, Dynatrace, Kubernetes, Swagger/OpenAPI, Cloud SQL, GCP
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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 Google Cloud Platform (GCP), utilizing Cloud SQL and aligning with cloud security and resilience best practices.

  • Apply Secure Software Development Lifecycle (SSDLC) practices to produce clean, maintainable, scalable, and secure code.

  • Implement automated testing strategies, including unit tests, integration tests, and service-level testing, to ensure reliability and quality of deliverables.

  • Participate actively in Agile delivery practices, including sprint planning, daily stand-ups, backlog refinement, reviews, and retrospectives.

  • Troubleshoot, diagnose, and optimize application and platform performance, including messaging throughput, database performance, and resource utilization.

  • Monitor and support application observability and operational health, using tools such as ElasticSearch, Grafana, Dynatrace, and platform-native monitoring solutions.

  • Collaborate closely with cross-functional teams, including architecture, QA, platform, and operations, to ensure successful end-to-end service delivery.

COMPETENCIES

Core Competencies (Must-have)

  • Java & Spring-Based Service Development (5+ years): Strong experience building, validating, and maintaining enterprise backend services and RESTful APIs.

  • Event‑Driven Architecture & Messaging (5+ years): Proven ability to design, test, and troubleshoot real-time event processing, message reliability, and integration workflows using Apache Kafka and Kafka Streams.

  • Microservices & Containerization (5+ years): Hands-on experience with containerized service deployment using Docker, OpenShift, and Kafka.

  • Database Expertise (5+ years): Experience with Oracle PL/SQL, PostgreSQL, and NoSQL, including data validation, performance tuning, and database behavior across integrated services.

  • TMF Forum Standards (5+ years): Ensure compliance with TMF OpenAPI standards for service, data, and process modeling in telecom ecosystems.

Complementary Competencies (Good-to-have)

  1. CI/CD & Test Automation

    • Experience with Jenkins and GitLab CI to automate build, test, and deployment pipelines for backend services.

    • Ability to integrate service-level and integration tests into CI/CD workflows to ensure early defect detection.

  2. Observability & Service Monitoring

    • Hands-on experience with ElasticSearch, Grafana, and Dynatrace (or equivalents) to monitor service health.

    • Ability to use logs, metrics, and traces to validate service behavior, support root-cause analysis, and improve reliability.

  3. Event Streaming & Messaging (Kafka)

    • Advanced experience with Apache Kafka, including topic design, producers/consumers, and event flow validation.

    • Exposure to Kafka Streams and Kafka Connect for real-time processing and system integration.

  4. Cloud & Platform Awareness

    • Working knowledge of Google Cloud Platform (GCP), including managed services such as Cloud SQL.

    • General understanding of AWS or Azure concepts and cloud-native service deployment models.

  5. Service Testing & API Validation

    • Strong experience with JUnit and service-level testing frameworks for unit, integration, and contract testing.

    • Proficiency with Swagger / OpenAPI for API documentation, validation, and standards compliance (including TMF OpenAPI).

  6. Containerization & Deployment Platforms

    • Experience deploying and validating services using Docker and OpenShift.

    • Foundational understanding of Kubernetes concepts as they relate to service scalability, resiliency, and testing.

QUALIFICATIONS

Educational Qualification(s)

  • University degree in Computer Science, Software Engineering, or other relevant discipline, or an equivalent combination of education and experience.

Work Condition(s)

  • Work Schedule: Mid Shift (4:00 PM – 1:00 AM Manila time)