Intermediate/Senior Informix & Legacy Systems Developer

Somerset Staffing • Batavia, IL

1d • Onsite

About The Position

We are seeking a technical specialist with deep expertise in legacy IBM/Informix platforms. This role is critical to supporting and modernizing our legacy infrastructure, specifically focusing on HP-UX and IBM AIX environments. You will be responsible for maintaining mission-critical ERP, supply chain, and warehouse management systems while driving technical performance optimizations. The core objective is to support and modernize a mission-critical Legacy ERP platform while expediting its integration with Salesforce and e-commerce platforms. This role operates within a Unix/Linux environment and involves daily coordination with a small, lean team consisting of one onsite resource and three offshore members.

Requirements

• Expert-level Informix 4GL, Genero BDL, and SQL.
• Proficiency in Java, Python, or Perl for integration and modern application support.
• Advanced knowledge of IBM Informix Dynamic Server (IDS).
• Mastery of Unix-based systems (HP-UX, IBM AIX, Linux) and Windows environments.
• Understanding of EDI (810, 820), XML, and API integration (RESTful/SOAP).
• Hands-on experience with Git, GitHub, or GitLab.
• Minimum 5 years of experience on the Informix legacy platform (specifically 4GL).
• Strong business understanding of Supply Chain workflows and operations.
• Proficiency in Unix/Linux and API development.
• Exceptional communication skills to effectively collaborate with and guide offshore team members.

Nice To Haves

• Familiarity with SQL Server, Oracle, or Snowflake.
• Experience with ERP Supply Chain concepts: Order creation, Pick-Pack-Ship, Invoicing, and Bill of Materials (BOM).
• Familiarity with Warehouse Management Systems (WMS) and manufacturing workflows.

Responsibilities

• System Modernization & Design: Collaborate with cross-functional teams to design and implement robust solutions that bridge legacy logic with modern requirements (e.g., migrating Informix 4GL to Genero BDL).
• Legacy Maintenance: Write and optimize clean, maintainable code in Informix 4GL, Genero BDL, and Unix Shell Scripting (Korn, Awk).
• Technical Troubleshooting: Resolve complex application issues and database performance bottlenecks using utilities like oncheck and set explain.
• Deployment & Testing: Lead integration, UAT, and performance testing activities to ensure high-quality deployments with minimal business disruption.
• Support & Documentation: Manage incidents and work orders escalated from the Service Desk, adhering to established SLAs, and maintain comprehensive technical documentation.
• Directly manage Informix 4GL development and maintenance.
• Lead API build-out and integration projects alongside key technical stakeholders.
• Operate within a Unix/Linux environment.
• Daily coordination with the offshore team.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed