AS400 Programmer

redShift•Hicksville, NY

12h•Onsite

About The Position

Our growing client is seeking a skilled AS400 RPG Developer to support, enhance, and modernize mission-critical business applications running on the IBM iSeries (AS/400) platform. This role offers the opportunity to work within a complex enterprise environment that combines established RPG-based systems with modern Java applications, APIs, and integration technologies. The ideal candidate is comfortable maintaining legacy business applications while also contributing to modernization initiatives that connect traditional systems with today's enterprise technologies. Position Overview As an AS400 RPG Developer, you will be responsible for developing, maintaining, troubleshooting, and enhancing core business applications that support day-to-day operations. You'll work across both legacy and modern technologies, helping bridge IBM iSeries environments with web services, APIs, and enterprise integration solutions. This position is ideal for someone who enjoys solving complex technical challenges, improving existing systems, and working directly with business users to deliver practical technology solutions.

Requirements

3–6 years of hands-on AS400 / IBM i development experience
Strong experience with: RPGLE, Free-Form RPG, RPG III, CL/CLLE, DB2/400
Experience supporting and maintaining enterprise business applications
Ability to analyze and troubleshoot complex application issues
Minimum 1 year of professional Java development experience
Strong understanding of object-oriented programming principles
Experience working with: JSON, XML, SOAP services, API integrations
Experience with data exchange, web services, and integration development
Knowledge of API design and implementation
Familiarity with IBM IFS and data transfer processes
SQL experience highly desirable

Nice To Haves

Bachelor's degree in Computer Science, Information Technology, or related field
Experience with embedded SQL (SQLRPGLE)
Experience modernizing legacy applications
Exposure to enterprise integration projects
Knowledge of software development lifecycle best practices
Experience working in manufacturing, distribution, logistics, or enterprise operational environments

Responsibilities

Design, develop, test, and deploy business applications on the IBM i (AS/400) platform
Maintain and enhance existing applications utilizing: RPG IV, RPGLE, Free-Form RPG, RPG III, CL and CLLE
Analyze existing programs and implement enhancements, bug fixes, and performance improvements
Troubleshoot production issues and provide timely resolution
Develop and maintain Java-based applications and integration tools
Build and support connectors that integrate legacy systems with modern platforms
Develop solutions that facilitate communication between IBM i systems and external applications
Support enterprise integration and data exchange initiatives
Work extensively with DB2/400 databases
Create, modify, and optimize queries and database processes
Utilize IBM query tools and reporting capabilities
Support embedded SQL development (SQLRPGLE) and database modernization efforts
Design and support RESTful and SOAP web services
Utilize the IBM Integrated File System (IFS) for secure data transfers and system integrations
Participate in modernization projects that improve interoperability and scalability
Support cross-platform integration and data exchange requirements
Collaborate with business users and stakeholders to gather requirements
Translate business needs into technical specifications and development plans
Document system functionality, code changes, processes, and integration workflows
Participate in code reviews and maintain development standards