COBOL AS400 developer

Engineering and Product | Software Engineering
Same job available in 51 locations

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Position Summary

Are you an experienced, passionate pioneer in technology who wants to work in a collaborative environment? As an experienced COBOL AS400 developer you will have the ability to share new ideas and collaborate on projects as a consultant without the extensive demands of travel. If so, consider an opportunity with Deloitte under our Project Delivery Talent Model. Project Delivery Model (PDM) is a talent model that is tailored specifically for long-term, onsite client service delivery.

Recruiting for this role ends on 03/31/2026.

Work you’ll do/Responsibilities  

  • Develop and maintain IBM i applications using COBOL (often ILE COBOL) to support core business processes (e.g., order-to-cash, billing, claims, inventory).
  • Design and update DB2 for i data structures (physical/logical files, tables, indexes) and write embedded SQL or native I/O for data access.
  • Build and enhance batch processing (end-of-day cycles, billing runs, financial postings), including job scheduling and restart/recovery logic.
  • Develop online/interactive components such as green-screen (5250) applications (e.g., DDS display files) and/or integrate with modern UIs/services where applicable.
  • Maintain RPG/CL integrations where solutions are mixed-stack, and write CL (Control Language) scripts for job control, file management, and automation.
  • Debug, test, and troubleshoot production issues (analyze job logs/spool files, dumps, and DB2 locks; perform root-cause analysis and fixes).
  • Performance tuning for programs and SQL (optimize queries, reduce I/O, improve batch runtimes, manage commitment control/locking behavior).
  • Support interfaces and integrations (flat files, FTP/SFTP workflows, EDI, message queues, APIs via middleware) and ensure data validation/reconciliation.
  • Implement change management (version control, promotions across environments, impact analysis, rollbacks, release notes).
  • Ensure operational reliability (monitor batch windows, handle reruns, manage dependencies, update runbooks).

The Team 

AI & Engineering leverages cutting-edge engineering capabilities to build, deploy, and operate integrated/verticalized sector solutions in software, data, AI, network, and hybrid cloud infrastructure. These solutions are powered by engineering for business advantage, transforming mission-critical operations. We enable clients to stay ahead with the latest advancements by transforming engineering teams and modernizing technology & data platforms. Our delivery models are tailored to meet each client's unique requirements.

Engineering as a Service provides complete design, implementation, and technology operations, leveraging our core engineering expertise. We transform engineering teams, modernize technology, and deliver complex programs with a product engineering approach. Our flexible delivery models—traditional teams, pools, or pods—are tailored to each client’s needs, offering engineering-led advisory, implementation, and operational capabilities to accelerate innovation.

Qualifications

Required

  • 6+ years of experience with AS400
  • 6+ years of experience with Healthcare and Claims adjudication
  • 6+ years of experience with DB2
  • Bachelor's degree, preferably in Computer Science, Information Technology, Computer Engineering, or related IT discipline; or equivalent experience
  • Limited immigration sponsorship may be available
  • Ability to travel 10%, on average, based on the work you do and the clients and industries/sectors you serve

The wage range for this role takes into account the wide range of factors that are considered in making compensation decisions including but not limited to skill sets; experience and training; licensure and certifications; and other business and organizational needs. The disclosed range estimate has not been adjusted for the applicable geographic differential associated with the location at which the position may be filled. At Deloitte, it is not typical for an individual to be hired at or near the top of the range for their role and compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range is $140000 to $152000.

You may also be eligible to participate in a discretionary annual incentive program, subject to the rules governing the program, whereby an award, if any, depends on various factors, including, without limitation, individual and organizational performance.

Information for applicants with a need for accommodation: https://www2.deloitte.com/us/en/pages/careers/articles/join-deloitte-assistance-for-disabled-applicants.html

Deloitte is committed to providing reasonable accommodations for people with disabilities. If you require a reasonable accommodation to participate in the recruiting process, please direct your inquiries to the Global Call Center (GCC) at USTalentCICInbox@deloitte.com.
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All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or protected veteran status, or any other legally protected basis, in accordance with applicable law.
Qualified applicants with criminal histories, including arrest or conviction records, will be considered for employment in accordance with the requirements of applicable state and local laws, including the Los Angeles County Fair Chance Ordinance for Employers, City of Los Angeles’s Fair Chance Initiative for Hiring Ordinance, San Francisco Fair Chance Ordinance, and the California Fair Chance Act. See notices of various fair chance hiring and ban-the-box laws where available. Fair Chance Hiring and Ban-the-Box Notices | Deloitte US Careers
Requisition code: 322940
Job ID 322940

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