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Senior Mainframe Developer Jobs in Delaware (NOW HIRING)

SR Partners LLC

Mainframe IMS DB with CICS

Wilmington, DE · On-site

$47.50 - $61/hr

Mainframe with IMS DB with CICS Location: Wilmington, DE (Onsite from Day 1) Required ... programming languages and database querying languages. Overall knowledge of the Software ...

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Senior Mainframe Developer information

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How much do senior mainframe developer jobs pay per hour?

As of Aug 11, 2026, the average hourly pay for senior mainframe developer in Delaware is $57.70, according to ZipRecruiter salary data. Most workers in this role earn between $54.13 and $63.03 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a senior mainframe developer, and why are they important?

To thrive as a Senior Mainframe Developer, you need deep expertise in mainframe programming languages (like COBOL, JCL, and PL/I), systems analysis, and a strong understanding of legacy application architectures, typically supported by a degree in computer science or related experience. Familiarity with tools such as IBM z/OS, DB2, CICS, and version control systems is essential, along with relevant certifications like IBM Certified System Programmer. Excellent problem-solving, communication, and leadership skills help you collaborate effectively and mentor junior developers. These skills are crucial for maintaining mission-critical systems, ensuring reliability, and guiding modernization efforts in complex enterprise environments.

What are some common challenges faced by senior mainframe developers when integrating legacy systems with modern technologies?

Senior Mainframe Developers often encounter challenges when integrating legacy mainframe systems with newer technologies such as cloud platforms, APIs, or microservices. These challenges include ensuring data consistency, maintaining system security, and minimizing downtime during migrations. Collaboration with cross-functional teams, such as infrastructure engineers and application developers, is key to developing seamless integration solutions. Staying up-to-date with modernization tools and best practices can help address these complexities and support the organization's digital transformation goals.

What is a senior mainframe developer?

Senior Mainframe Developers are experienced professionals who design, develop, and maintain mainframe systems—large-scale computers used by organizations for critical applications, bulk data processing, and enterprise resource planning. They are proficient in languages like COBOL, JCL, and Assembler, and often work with databases and transaction processing systems. Their responsibilities include troubleshooting system issues, optimizing performance, mentoring junior developers, and ensuring the reliability and security of mainframe operations.
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Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Delaware as of August 2026, with employment types broken down into 78% Full Time, 7% Part Time, and 15% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $120,019 per year, or $57.7 per hour.

Mainframe Senior Application Developer with Production Support

Hirekeyz Inc

Wilmington, DE • On-site

$47.50 - $61.25/hr

Full-time

Re-posted 15 days ago

Job description

Job Title: Mainframe Senior Application Developer with Production Support

Location : Wilmington DE

Job Type: W-2/Full Time

Job Description:

Mandatory Skills - IBM-Z/OS COBOL, CICS, DB2, IMS, IBM MQ, VSAM, JCL, CA7, Changeman and IBM Mainframe Utilities along with on-call support for all regions including production

Job Description:

•            Solid Hands-on experience in IBM-Z/OS COBOL, CICS, DB2, IMS, IBM MQ, VSAM, JCL, CA7, Changeman and IBM Mainframe Utilities

•            Strong Analytical and debugging skills and experience in developing, debugging, and maintaining code in a large corporate environment

•            Overall knowledge of the Software Development Life Cycle, solid understanding of agile methodologies such as CI/CD, Application Resiliency, and Security

•            Ability to work in large, collaborative teams to achieve organizational goals, and passionate about building an innovative culture

•            On-call support for all environments including weekends on rotation basis and to participate in production issues if any arise during non on call support

•            Troubleshooting and resolving application issues in a timely and efficient manner

•            Knowledge in Banking and Cards will be best

Key Words to search in Resume

Production support, DB2, IMS, CICS, MQ