Role : Intermediate / Senior Informix & Legacy Systems Developer
Location : Batavia, IL
Visa Status : No OPT,CPT,H1B
Position Overview
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.
Key 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.
Required Technical Skills
Primary Languages : Expert-level Informix 4GL , Genero BDL , and SQL .Secondary Languages : Proficiency in Java , Python , or Perl for integration and modern application support.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, GitHub, or GitLab.
Preferred Domain Knowledge
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.Role & Project Scope
Core Objective : Support and modernize a mission-critical Legacy ERP platform while expediting its integration with Salesforce and e-commerce platforms.Key Responsibilities :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.Candidate Requirements
Technical Expertise : Minimum 5 years of experience on the Informix legacy platform (specifically 4GL ).Domain Knowledge : Strong business understanding of Supply Chain workflows and operations.Technical Environment : Proficiency in Unix / Linux and API development .Soft Skills : Exceptional communication skills to effectively collaborate with and guide offshore team members.