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Intermediate/Senior Informix & Legacy Systems Developer

Expert In Recruitment Solutions

Batavia, IL

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JOB DETAILS
SKILLS
Acceptance Testing, Application Integration, Application Programming Interface (API), Awk, Bill of Materials (BOM), Billing, Communication Skills, Cross-Functional, Customer Relations, Customer Support/Service, Database Administration, ERP (Enterprise Resource Planning), Electronic Data Interchange (EDI), Fourth Generation Language, Git, GitHub, IBM AIX Operating System, IBM Product Family, Identify Issues, Informix, Informix 4GL, Integration Testing, Intrusion Detection Systems, Java, Ksh (Korn Shell) Scripting, Linux Operating System, Manufacturing, Microsoft SQL Server, Microsoft Windows Operating System, Offshoring, Operating Systems, Oracle Database, Order Picking/Packing, Performance Testing, Performance Tuning/Optimization, Perl Programming Language, Problem Solving Skills, Process Improvement, Python Programming/Scripting Language, REST (Representational State Transfer), SOAP (Simple Object Access Protocol), SQL (Structured Query Language), Salesforce.com, Service Level Agreement (SLA), Software Administration, Source Code/Configuration Management (SCM), Supply Chain, Supply Chain Management, Supply Chain Operations, Support Documentation, Team Player, Technical Writing, Technical/Engineering Design, Unix Operating Systems, Unix Shell Programming, User Interface/Experience (UI/UX), Warehousing, XML (EXtensible Markup Language), eCommerce
LOCATION
Batavia, IL
POSTED
30+ days ago
Intermediate/Senior Informix & Legacy Systems Developer
Batavia, IL - Hybrid


Must be a local.

Job Description
Role: Intermediate/Senior Informix & Legacy Systems Developer

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 Client-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 (Client-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.

About the Company

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Expert In Recruitment Solutions