Sr. Application Developer - Bilingual (English/Korean)

Woongjin
Ridgefield Park, NJ

Company Description

For More Open Positions Visit us at:

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

Job Description

  • Design, develop, and maintain robust, scalable applications and modules, writing clean, efficient, and well-documented code
  • Manage the entire software development lifecycle, including planning, prioritizing, testing, and releases, often using Agile methodologies
  • Lead, guide, and mentor junior developers, conducting code reviews and ensuring adherence to best practices
  • Work closely with project managers, business analysts, designers, and other engineers to define requirements and deliver innovative solutions
  • Implement automated testing, debug issues, troubleshoot complex problems, and ensure application security and performance
  • Contribute to high-level application design and database architecture
  • Participate in internal and external meetings to gather the business requirements and suggest solutions
  • Analyze the business requirements and suggest the best practice to apply to the business requirements
  • Write clean code to produce fully functional backend processes and frontend UI modules
  • Develop a new or existing system of frontend UI and APIs
  • Write unit, integration, and production test scenarios
  • Troubleshoot and debug to optimize application performance
  • Liaise with the development team to identify and plan new features
  • Research and suggest new technologies, applications, and protocols
  • Be an individual contributor when it comes to designing and developing frameworks and critical pieces of code that have a wider impact
  • Create detailed technical plans for the execution and implementation of projects
  • Be available to answer technical questions, clarifications, and clear obstacles for the team
  • Being transparent with the team about challenges, failures, and successes
  • Writing development progress reports

Qualifications

  • 10+ years of application development experience
  • Bilingual (English/Korean)
  • Bachelor’s degree in computer science, engineering, or a related field
  • Extensive knowledge of Java development. This includes the whole process, from the first line of code to implementation in the production environment
  • Deep knowledge of operating systems, including but not limited to
  • Proficiency with writing automated tests in JUnit, Espresso, Mocha, Jest, Enzyme, XCTest, etc.
  • Proficiency in Java, with a good understanding of its ecosystems
  • Sound knowledge of Object-Oriented Programming (OOP) Patterns and Concepts
  • Familiarity with different design and architectural patterns
  • Skill for writing reusable Java libraries
  • Know-how of Java concurrency patterns
  • Good understanding of the concepts of MVC (Model-View-Controller) Pattern, JDBC (Java Database Connectivity), and RESTful web services
  • Experience in working with popular web application frameworks like Play and Spark
  • Relevant Knowledge of Java GUI frameworks like Swing, SWT, and AWT according to project requirements
  • Extensive knowledge of the class loading mechanism in Java
  • Experience in handling external and embedded databases such as Oracle, MS SQL, etc.
  • Understanding basic design principles behind a scalable application
  • Skilled at creating database schemas that characterize and support business processes
  • Basic knowledge of JVM (Java Virtual Machine), its drawbacks, weaknesses, and workarounds
  • Implementing automated testing platforms and unit tests
  • In-depth knowledge of code versioning tools, for instance, Git
  • Expertise in continuous integration
  • Experience in Java Server Pages (JSP) and servlets, Web frameworks like Struts and Spring
  • Web Technologies like HTML, JavaScript, CSS, JQuery
  • Abstract classes and interfaces
  • Constructors, lists, maps, sets
  • File IO and serialization, Exceptions, and Generics
  • Java Keywords like static, volatile, synchronized, transient, etc
  • Multithreading and Synchronization
  • Experience with profiling and debugging Java-based applications and products
  • Experience integrating with backend systems preferred, such as ERPs, WMS, OMS, etc.
  • Solid knowledge of performance Improvement best practices
  • Experience in a similar role would be advantageous
  • Willingness to build professional relationships with staff and clients
  • Excellent communication, motivational, and interpersonal skills

Additional Information

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

*** NO C2C ***

Posted 2026-03-22

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