Senior Informix & Legacy Systems Developer

Intermediate/Senior Informix & Legacy Systems Developer

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Location:

Batavia, IL (Hybrid)

Duration: 6 Month+

LOCALS ONLY

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.

• 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.

• Primary
  
  Languages:
  
  Expert-level Informix 4GL, Genero BDL, and SQL.
• Secondary
  
  Languages:
  
  Proficiency in Java, Python, or Perl.
• Database Management:
  Advanced knowledge of IBM Informix Dynamic Server (IDS); familiarity with SQL Server, Oracle, or Snowflake is a plus.
• Operating Systems:
  Mastery of Unix-based systems (HP-UX, IBM AIX, Linux) and Windows environments.
• Integrations:
  Understanding of EDI (810, 820), XML, and API integration (RESTful/SOAP).
• Version Control:
  Hands‑on experience with Git, Git Hub, or Git Lab.

• 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.

• 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.

• Core Objective:
  Support and modernize a mission‑critical Legacy ERP platform while expediting its integration with Salesforce and e‑commerce platforms.
• Directly manage Informix 4GL development and maintenance.
• Lead API build‑out and integration projects alongside key technical stakeholders.
• Operate within a Unix/Linux environment.
• Team Dynamics:
  Small, lean team consisting of one onsite resource and three offshore members; requires daily coordination with the offshore team.