AS/400 Developer

Role: AS/400 Developer

Location: Houston, TX (On-Site)

Duration: Long Term Contract

Job Description:

• To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required.

Requirements:

• 12+ years of AS400/iSeries-based application development, support and enhancement experience.
• 8+ years working with COBOL & AS400/iSeries architecture using ILE (COBOL, RPGLE, CLLE, QS36) and IBM DB2 (SQL, stored procedures, query optimization, green-screen).
• 8+ years of experience in ILE modernization and AS400 performance optimization, including refactoring, tuning, and production stability.
• 3+ years of strong experience with IBM Liberty (WebSphere Liberty) & WebSphere in hybrid legacy-modern architectures.
• Advanced Unix/Linux proficiency (scripting, job control, cross-platform support).
• Expertise in IBM MQ (ILE MQ Series) and XML integration, including SSIS-based messaging workflows.
• Proven ability to architect scalable, high-performance, mission-critical systems bridging legacy and modern platforms.
• Strong analytical and problem-solving skills with the ability to convert business requirements into functional requirements and production code.
• Demonstrated ability to deliver high-quality work in an iterative development model.
• Excellent verbal and written communication skills and the ability to work independently or within a team.
• Test-driven development experience is a plus.

Role Description:

• Responsible for developing, maintaining, enhancing, and supporting business applications running on the IBM AS400 (IBM i) platform. Works closely with business stakeholders, analysts, and technical teams to deliver efficient, reliable, and high-quality software solutions.

Key Responsibilities:

• Develop and maintain applications using RPG III, RPG IV (RPGLE), CLLE, and SQLRPGLE.
• Analyze business requirements and provide technical solutions.
• Design, code, test, and implement IBM i applications.
• Develop and maintain DB2/400 database objects, files, views, and stored procedures.
• Perform application support, troubleshooting, and root-cause analysis for production issues.
• Create and execute unit tests and support UAT activities.
• Monitor scheduled jobs, batch processes, and system performance.
• Work with source control and change-management tools.
• Prepare technical documentation and support knowledge-transfer activities.
• Collaborate with cross-functional teams for enhancements and system integrations.
• Ensure compliance with organizational coding and security standards.

Essential Skills:

• AS400/iSeries development, COBOL, RPGLE, CLLE, SQL, DB2/400, IBM Liberty/WebSphere, Unix/Linux scripting, IBM MQ.