About MJ Celco
MJ Celco is a family-owned precision metal stamping and sheet metal fabrication company headquartered in Schiller Park, Illinois, with an additional manufacturing facility in Apodaca, Nuevo León, Mexico. We're IATF 16949-certified and serve customers who depend on us for precision, reliability, and continuous improvement - and we're investing in modernizing the systems that keep our shop floor running.
Position Overview
We are seeking a skilled and motivated IBM i / RPG Developer to join our IT manufacturing systems team in a hybrid capacity. In this role, you will design, develop, maintain, and modernize core applications that power our manufacturing operations-including production scheduling, inventory control, shipping/receiving, and shop floor management.
The ideal candidate bridges traditional RPG development with modern DevOps practices, ideally with experience in Git-based version control and modern development environments like Microsoft Visual Studio Code (using the Code for IBM i extension). Familiarity with modern IBM i build tools such as IBM Bob (TOBi) is a strong plus - we're happy to train the right candidate on our specific toolchain.
Work ScheduleLocation (Hybrid)
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Employment Type: Full-Time
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Schedule: Hybrid (3 days on-site, 2 days remote per week).
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On-Site Location: Schiller Park, Illinois
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Systems Scope: The manufacturing systems this role supports are shared across our Schiller Park, IL and Apodaca, Mexico facilities; all development work is performed from Schiller Park - no relocation or international travel required.
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On-Site Purpose: Collaborative team meetings, direct partnership with executive team and plant/floor management, physical hardware integrations (scanners, scale systems, printers), and critical production deployment support.
Key Responsibilities
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Manufacturing Application Development: Design, code, test, and support applications using RPG IV (RPGLE), Free-Form RPG, and Control Language (CL/CLLE).
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Modern Development Environments: Write and debug code using Microsoft Visual Studio Code (VS Code) leveraging the Code for IBM i ecosystem to drive modern development practices.
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DevOpsBuild Automation: Set up, configure, and maintain automated build processes using IBM Bob (TOBi) to manage object compilation and dependency tracking across environments.
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ERP MaintenanceIntegration: Support, configure, and customize our core manufacturing ERP system.
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Shop FloorSupply Chain Integration: Develop and maintain integrations for shop floor data collection, barcode scanning, warehouse management systems (WMS), and shipping/logistics platforms.
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Database Management: Write and optimize complex DB2 database queries, triggers, and stored procedures to ensure accurate, real-time tracking of inventory and production metrics.
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System Modernization: Actively migrate legacy codebase - including programs originally written in System/36-era RPG and CL - to Free-Form RPG, and adopt VS Code integrated with Git-based source control.
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Cross-Functional Collaboration: Partner closely (both virtually and in-person during on-site days in Schiller Park) with executive management, plant managers, supply chain teams, and business analysts to translate floor-level requirements into technical solutions.
QualificationsSkills
Required TechnicalDevOps Skills:
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Programming Languages: Proficiency in RPG IV and Free-Form RPG (ILE RPG), and CL/CLLE. Experience modernizing legacy System/36-era RPG and CL programs to current IBM i standards is highly valued - this is a real, ongoing part of our environment, not just a nice-to-have.
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IDE Experience: Proficient in using Microsoft Visual Studio Code (VS Code) with the Code for IBM i suite (or Rational Developer for i) for day-to-day development.
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BuildVersion Control: Strong experience with Git for version control. Familiarity with modern IBM i build tools (e.g., IBM Bob / TOBi) is a plus - we're happy to train the right candidate on our specific build pipeline.
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Database: Strong experience with DB2 for i and advanced SQL (Embedded SQL, DDL, DML).
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Concepts: Solid understanding of modular programming (service programs, binding directories, modules).
Manufacturing-Specific Qualifications:
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ERP Experience: 4+ years of experience working with manufacturing ERP systems on the IBM i platform.
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Supply Chain Tech: Experience handling EDI standards (e.g., ANSI X12, EDIFACT) for processing purchase orders, shipping notices, and invoices.
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Integration Experience: Familiarity with integrating IBM i with shop floor hardware (e.g., Zebra printers, RF scanners, scale systems).
Soft SkillsHybrid Requirements:
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High urgency and strong problem-solving skills to minimize manufacturing downtime.
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Self-motivated, collaborative, and highly disciplined to work effectively during remote days.
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Strong communication skills, with the ability to explain technical details to non-technical plant staff both in-person and via virtual collaboration tools (e.g., Teams, Slack, Zoom).
EducationExperience
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Bachelor's degree in Computer Science, Information Systems, Industrial Engineering, or equivalent practical experience.
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5+ years of experience developing in an IBM i (AS/400) environment, preferably within a manufacturing or distribution setting.
