For More Open Positions Visit us at:
http://recruiting.woongjininc.com/

Our Mission

WOONGJIN, Inc. is a rapidly growing team who provides a range of unique, exceptional, and enhanced services to our clients. We have a strong moral code that includes the service of goodness without expectations of reward. We are motivated by the sense of responsibility and servant leadership.

Benefits

• Medical Insurance
• Vision Insurance
• Dental Insurance
• 401(k)
• Paid Sick hours

Role Summary
The Java Backend Developer will design and implement core backend enhancements for the BYOD Enhancement Project, enabling BYOD(Bring Your Own Device) to operate as a highly available primary service with resilient fallback to WMP and Global BYOD APIs.

Key Responsibilities

• Design and implement a local BYOD database with indexing, data freshness tracking, and retention policies
• Develop hybrid query logic: primary local DB lookup with configurable fallback to WMP API and Global BYOD API
• Implement SFTP-based batch ingestion (CSV sync, validation, reconciliation, error handling)
• Enhance backend services including data schema, scheduling framework, and API endpoints
• Implement monitoring, logging, metrics, and alerting for availability, performance, and API usage
• Ensure fault-tolerant design and seamless fallback between BYOD, WMP, and Global APIs

• 5+ years of Java backend development experience
• Strong experience with RESTful APIs, database design (RDBMS), and batch processing
• Experienced Java Developer with the following areas:
  • Must Have: Core Java (8+/11+/17+), Spring Boot, Spring Cloud, Spring MVC, Spring Security, RESTful API Design, Microservices Architecture, Message Brokers (Kafka/RabbitMQ), JPA/Hibernate, Docker, Kubernetes, CI/CD Pipelines (Jenkins/GitLab CI/GitHub Actions)
• Application Server Expertise:
  • Oracle WebLogic Server: Deployment, configuration, clustering, and administration.
  • Apache Tomcat: Setup, deployment, tuning, and management.
  • Application server troubleshooting and performance optimization
• Linux Server Deployment & Administration
  • Linux server setup, configuration, and management (RHEL, CentOS, Ubuntu).
  • Shell scripting and automation.
  • Application deployment and release management on Linux environments.
  • Server monitoring, log analysis, and troubleshooting
• Strong expertise in database technologies:
  • Oracle Database: PL/SQL, Oracle Performance Tuning, Oracle RAC, Partitioning, Indexing Strategies, AWR/ASH Reports, Execution Plan Analysis.
  • PostgreSQL: Query Optimization, pg_stat_statements, Partitioning, Replication, pgAdmin.
  • Other Databases: MySQL, MongoDB, SQL Server, Redis, Cassandra.
• Batch Processing & Scheduling:
  • Spring Batch, Quartz Scheduler, Apache Airflow.
  • ETL processes and data pipeline development.
  • Cron jobs, scheduled tasks, and job orchestration.
  • Large-scale data processing and bulk operations
• Experience building high-availability, resilient backend services
• Hands-on experience with logging, monitoring, and performance tuning

Preferred Qualifications

• Experience with telecom/carrier integrations or large-scale device data systems
• Familiarity with cloud environments and distributed system design
• Experience handling external API dependency and fallback strategies

All your information will be kept confidential according to EEO guidelines.

 *** NO C2C ***