WebSphere Commerce Server Technical Lead - Java

Senior Backend Developer responsible for migrating a mission-critical flight test application (FTCS) from legacy J2EE infrastructure to modern supported platforms. The role requires hands-on expertise in Java enterprise migration, database performance tuning, and application server configuration. The candidate will work across all migration phases including Oracle upgrade, RHEL migration, WebSphere to Liberty transition, and batch scheduler replacement., Migrate 108 EJB 2.0 session beans from IBM WebSphere 8.5 to IBM Liberty, ensuring identical Container-Managed Transaction behavior across 350+ transactional methods Configure Liberty server.xml including JNDI bindings, DataSource, LDAP security, and EJB compatibility features Upgrade Java 8 application code to Java 11 and subsequently Java 21, resolving removed API dependencies (JAXB, javax.activation, internal access) Validate 9,308 SQL queries against Oracle 19c, identify and resolve performance regressions using SQL Plan Baselines and optimizer parameter control Replace Flux 7.11.3 batch scheduler with Spring Batch + Quartz, migrating 67 scheduled jobs with parallel-run validation Upgrade third-party libraries including iText 1.3 to OpenPDF 2.x, JasperReports 1.0.1 to 7.x, Commons HttpClient 3.x to 5.x, and Commons Collections 2.1 to 4.5.x Recompile and validate C/JNI native code on RHEL 9.4 Work with DBA to profile and tune 217 stored procedures (120,887 lines PL/SQL) during Oracle migration Resolve IBM-specific code dependencies (com.ibm.ws.webservices, WAS deployment descriptors) Implement OpenWebStart and jpackage-based client delivery to replace Java Web Start

Must Have: 8+ years Java enterprise development (Java 8 through 17+) Strong experience with EJB (2.x and 3.x), Container-Managed Transactions, JNDI IBM WebSphere Application Server administration and configuration IBM Liberty or Open Liberty migration experience Oracle Database - SQL tuning, EXPLAIN PLAN analysis, PL/SQL reading comprehension JDBC, connection pooling, DataSource configuration Spring Framework (Core, JdbcTemplate, Batch) Experience migrating legacy Java applications (javax jakarta, removed APIs) Linux/RHEL system administration basics (shell scripting, service management) Git, CI/CD pipelines (Azure DevOps preferred) Strongly Preferred: Previous Oracle upgrade experience (11g/12c 19c) with performance regression remediation SQL Plan Baselines, AWR reports, optimizer parameter tuning Quartz Scheduler or Spring Batch job development JNI/native code integration (C libraries, shared objects) SOAP web services (JAX-WS, Axis) iText/OpenPDF or JasperReports Cognos BI integration Application security (LDAP, role-based access, code signing) Nice to Have: Flux job scheduler experience HDF5/NetCDF scientific data formats Boeing or aerospace domain experience PKCS11 code signing Jersey 1.x to JAX-RS 2.0 migration

Other Requirements

Nice to Have: Flux job scheduler experience HDF5/NetCDF scientific data formats Boeing or aerospace domain experience PKCS11 code signing Jersey 1.x to JAX-RS 2.0 migration