Intermediate/Senior Informix & Legacy Systems Developer

job summary:
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.

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.

location: Batavia, Illinois
job type: Contract
salary: $65 - 75 per hour
work hours: 9am to 5pm
education: Bachelors


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.

qualifications:
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.

Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.

At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact [email protected].


Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).

This posting is open for thirty (30) days.