Sr. Developer - AS400

Logisoft Technologies Inc; King of Prussia (PA); On-site; USD 110,000 - 140,000; Full time

Job summary

Logisoft Technologies Inc. in King of Prussia, PA, seeks an experienced Sr. Developer - AS400 to join our technology team. You will work on IBM i / AS400 applications, including RPG, RPGLE, CL, SQL/400, and DB2/400, supporting production systems and modernization efforts.

The role emphasizes hands-on coding, troubleshooting, and collaboration with business users, QA, and infrastructure teams. A BS in CS/IT and 8+ years AS400 development are required.

Qualifications

• Bachelor's degree in computer science, information technology, or related field.
• Minimum 8 years of relevant AS400 development experience.
• Strong hands-on experience in RPG, RPGLE, CL, CLLE, ILE, and Free Format RPG.
• Good knowledge of DB2/400, SQL/400, DDS, physical/logical files, and stored procedures.
• Experience in incident management, problem management, and production support.
• Familiarity with job scheduling, batch processing, and AS400 utilities.
• Strong analytical, debugging, and problem-solving skills.

Responsibilities

• Design, develop, test, and maintain AS400 applications.
• Analyze business requirements and convert them into technical specifications.
• Develop and support programs using RPG, RPGLE, CL, CLLE, SQLRPGLE, and DB2/400.
• Troubleshoot production issues and provide timely resolution.
• Perform code reviews, unit testing, and defect fixes.
• Work on enhancements, maintenance, and modernization initiatives.
• Support batch jobs, job scheduling, and system monitoring.
• Collaborate with business users, analysts, QA, and infrastructure teams.
• Ensure adherence to coding standards, release processes, and best practices.
• Prepare technical documentation and support knowledge transfer.

Skills

RPG / RPGLE

CL / CLLE / ILE

SQL / DB2/400

DDS / physical & logical files

Problem solving / debugging

Batch processing / job scheduling

Education

Bachelor's degree in CS/IT or related field

Tools

IBM Job Scheduler

ROBOT

MQ / Connect Direct / SFTP

Change management tools

Job description

Role Summary

We are looking for an experienced Sr. Developer - AS400 to join our technology team. The ideal candidate will have strong hands‑on experience in IBM i / AS400 application development, support, and maintenance, along with solid expertise in RPG, RPGLE, CL, DB2/400, and SQL/400. The role involves working on critical business applications, analyzing requirements, developing solutions, and supporting production environments.

Key Responsibilities

• Design, develop, test, and maintain AS400 applications.
• Analyze business requirements and convert them into technical specifications.
• Develop and support programs using RPG, RPGLE, CL, CLLE, SQLRPGLE, and DB2/400.
• Troubleshoot production issues and provide timely resolution.
• Perform code reviews, unit testing, and defect fixes.
• Work on enhancements, maintenance, and modernization initiatives.
• Support batch jobs, job scheduling, and system monitoring.
• Collaborate with business users, analysts, QA, and infrastructure teams.
• Ensure adherence to coding standards, release processes, and best practices.
• Prepare technical documentation and support knowledge transfer.

Required Skills

• 8+ years of experience in IBM AS400 / iSeries development and maintenance.
• Strong hands‑on experience in RPG, RPGLE, CL, CLLE, ILE, and Free Format RPG.
• Good knowledge of DB2/400, SQL/400, DDS, physical/logical files, and stored procedures.
• Experience in incident management, problem management, and production support.
• Familiarity with job scheduling, batch processing, and AS400 utilities.
• Strong analytical, debugging, and problem‑solving skills.
• Ability to work independently and handle multiple priorities.

Preferred Skills

• Experience in code migration or modernization from fixed format to free format RPG.
• Exposure to tools such as IBM Job Scheduler, ROBOT, and change management tools.
• Knowledge of MQ, Connect Direct, SFTP, or interface integrations.
• Experience in Agile/Scrum delivery environments.
• Good communication and stakeholder management skills.

Qualifications

• Bachelor''''s degree in computer science, Information Technology, or related field.
• Minimum 8 years of relevant experience in AS400 development.