{"id":4201948,"url":"https://alion.io/job/woongjin-sr-backend-java-developer","title":"Sr. Backend Java Developer","company":{"id":4417252,"name":"Woongjin","domain":"wjncompany.com","url":"https://alion.io/company/wjncompany","size_band":null,"is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"A","score":94,"open_postings":52,"ghost_share":0,"stale_share":0.231,"repost_share":0,"time_to_fill_p50_days":33,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Plano, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":100000,"max":108000,"currency":"USD","period":"year","gross":null,"usd_annual":108000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Tomcat","optional":false},{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"GitHub","optional":false},{"name":"Hibernate","optional":false},{"name":"Jackson","optional":false},{"name":"Java","optional":false},{"name":"Jenkins","optional":false},{"name":"JUnit","optional":false},{"name":"Maven","optional":false},{"name":"Oracle","optional":false},{"name":"Rest API","optional":false},{"name":"SOAP","optional":false},{"name":"Spring Boot","optional":false},{"name":"Spring Framework","optional":false},{"name":"Spring MVC","optional":false},{"name":"Spring Security","optional":false},{"name":"SQL","optional":false},{"name":"Swagger","optional":false},{"name":"WebSockets","optional":false},{"name":"MySQL","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Python","optional":true}],"status":"live","first_seen_at":"2026-11-12T19:12:00Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-12T22:35:37Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"For More Open Positions Visit us at:\nhttp://recruiting.woongjininc.com/\nOur Mission\nWOONGJIN 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.\nBenefits\nMedical Insurance\nVision Insurance\nDental Insurance\n401(k)\nPaid Sick hours\nWe are seeking an experienced Java Back-end Developer to join our team. The ideal candidate will be responsible for designing, developing, and maintaining robust and scalable back-end solutions using Java and related technologies. This Senior Developer will work closely with cross-functional teams to deliver high-quality software solutions that meet our business needs.\nResponsibilities:\nDesign, develop and maintain high quality, production grade and secure RESTful web services and APIs using Java and Spring Framework, while modeling best practices for reliability, testability and operational excellence.\nWork with Spring Framework modules, including Spring Core, Spring MVC, Spring Security, Spring Data, Spring JDBC, and Spring Batch.\nImplement database integration using MyBatis, JDBC, Hibernate/JPA, and Oracle SQL.\nImplement caching mechanisms to improve application performance and scalability.\nHandle data serialization and deserialization using JSON, XML, Jackson, and other serialization frameworks.\nDevelop and maintain API documentation using SpringFox and Swagger/OpenAPI.\nImplement real-time communication and integrations using WebSocket.\nUnderstand CDN integration, caching strategies, and content delivery optimization.\nDeploy, configure, monitor, and troubleshoot applications on Apache Tomcat and Oracle WebLogic.\nImplement application security using OAuth 2.0, JWT, SSO, and SSL/TLS.\nDevelop unit and integration tests and participate in code reviews.\nWork with Maven, Git/GitHub, Jenkins, and CI/CD pipelines.\nIntegrate and apply AI techniques (LLMs, AI assisted development tools etc.) to improve software engineering workflows, developer productivity and operational efficiency.\nParticipate in production support, performance tuning, debugging, and root-cause analysis.\nShare your passion for staying on top of tech trends, experimenting and learning new technologies, and mentoring other members of our Engineering team.\n Bachelor's degree in Computer Science, Engineering, or a related field.\n5 Plus years of experience in Java back-end development.\nProficiency in Java programming language and related frameworks (e.g., Spring, Spring Boot, Spring Batch).\nStrong understanding of object-oriented programming principles, data structures, and algorithms.\nExperience with Oracle SQL and database design principles.\nProficiency in RESTful web services and API development.\nExperience with build tools such as Maven.\nKnowledge of version control systems, particularly Git.\nStrong knowledge of application servers such as Tomcat and WebLogic.\nExperience with continuous integration tools such as Jenkins.\nFamiliarity with automated testing frameworks such as JUnit.\nUnderstanding of authentication and authorization mechanisms, including OAuth.\nKnowledge of SOAP web services and related technologies.\nStrong problem-solving skills and attention to detail.\nExcellent communication and collaboration skills.\nAbility to work effectively in a fast-paced, agile environment.\nSelf-motivated, eager to learn, and willing to take on new challenges while actively contributing to team goals.\nPreferred Qualifications:\nExperience with other databases such as MySQL, PostgreSQL, or MongoDB.\nFamiliarity with continuous integration/continuous deployment (CI/CD) pipelines.\nUnderstanding of software development best practices and design patterns.\nExperience with Python.\n All your information will be kept confidential according to EEO guidelines.","description_format":"text","description_chars":3922,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":["Dental insurance","Health insurance","Vision insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","Enterprise Apps Implementation 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