Volunteer Open Source Jobs in Missouri (NOW HIRING)

Do you want to work for a company where the people are the purpose? At Grimco, our developers aren’t just maintaining a system — they’re building and modernizing a platform that runs the daily operations of one of North America’s leading sign supply distributors. As an IBM i Developer, you’ll have direct ownership of meaningful work on a mission-critical platform, with the support and mentorship to grow your skills alongside it.

Key Responsibilities & Duties 

• Develop new business applications and maintain existing ones using fully free-format ILE RPG (RPGLE / SQLRPGLE) and CL. 

• Write efficient embedded SQL against a DB2 database to support data retrieval, processing, and reporting. 

• Build and maintain modular ILE objects — modules, service programs, and binding directories. 

• Collaborate with project managers, QA, and business stakeholders to translate requirements into clean, well-documented code. 

• Participate in code reviews, debugging, root cause analysis, and production support. 

• Work within a structured development workflow using Jira and contribute to deployment processes. 

• Integrate with external systems and data interchange processes as needed. 

• Stay current with RPG modernization trends, including open-source tooling and API and modern interface integration. 

  Work Authorization: Candidates must be authorized to work in the 
  United States. Grimco does not provide employment visa 
  sponsorship (e.g., H-1B, O-1, TN) and will not do so in the future 
  for this position.

Required Qualifications 

• 3–5 years of development experience on IBM i (AS/400 / iSeries / Power Systems). 

• Demonstrated proficiency in fully free-format RPG IV. 

• Strong understanding of ILE concepts: modules, service programs, binding directories, and activation groups. 

• Embedded SQL and DB2 for i — SQL-based I/O is the standard here, not the exception. 

• CL / CLLE for job control and batch processing. 

• Familiarity with prototype keywords, data structures, and modern procedure-based program design. 

• Ability to read, understand, and modernize legacy fixed-format code when needed — without writing new fixed-format code. 

• Experience with RDi or VS Code + Code4i extension for development. 

Preferred Qualifications 

• Experience with EDI or data interchange — X12 transaction sets, flat file processing, FTP automation. 

• Background in distribution, inventory, or order management systems. 

• Exposure to open-source tooling on IBM i (Node.js, PHP, Python via PASE). 

• COMMON Certified Application Developer — ILE RPG on IBM i, or active pursuit of it. 

• Familiarity with Jira and Agile / project-based development workflows. 

• Security-minded with awareness of current IBM i and application security best practices. 

Benefits 

• Full medical, dental, and vision benefits available. Premiums have remained unchanged for more than 16 years. 

• Paid Maternity/Paternity Leave. 

• Paid Holidays. 

• Paid Time Off Accrual (Paid Time Off payout available). 

• 401K with Profit Sharing, up to 6% of the employee’s total compensation earnings. 

• IBM training and certification support. 

• Employee Referral Benefits. 

• Volunteer Time Off. 

About Grimco 

Grimco is a national wholesale sign supply manufacturer and distributor with over 65 locations across North America and the United Kingdom. Founded over 150 years ago and still family-owned, we focus on delivering quality products and outstanding service to the sign industry. Our platform has powered the business for decades — and continues to evolve. 

By completing this online application for employment, you certify that the information on this application is true and complete to the best of your knowledge. You understand that any misrepresentation or omission of fact in response to any inquiry made in this application may result in rejection of application or, if hired, dismissal whenever it is discovered. You authorize and release all parties from any liability or damage that may result from seeking, furnishing, or using such information. You understand and agree that, if hired, your employment is for no definite period and may, regardless of the date of payment of compensation, be terminated by Grimco, Inc. at any time, for any or no reason, with or without notice. You understand that no representation to the contrary is valid unless in writing, set a definite term of employment, and signed by the company's CEO. You further understand and agree that any job offer is contingent upon your passing, to the company's satisfaction, a drug and/or alcohol test, criminal background check and other possible screenings. You understand that this application is active for 90 days only, and if you do not hear from the company but still wish to be considered for employment after 90 days, you will need to fill out a new application.