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Senior Mainframe Developer Jobs in Delaware (NOW HIRING)

Lorven Technologies

Sr. Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

Hi, Our client is looking for a Sr. Mainframe Developer in Wilmington, DE location below is the detailed requirement. Job Title: Sr. Mainframe Developer Location: Wilmington, DE * Bachelor's degree ...

Enexus Global

Sr Mainframe Developer

Wilmington, DE · On-site

Job title: Sr Mainframe Developer Role is Hybrid (3 days/wk) Client address: 880 Powder Mill Rd Wilmington, DE 19803 Years of experience required: 8+ Develops and implements solutions that address ...

enexusglobal

Sr Mainframe Developer

Wilmington, DE · On-site

Job title: Sr Mainframe Developer Role is Hybrid (3 days/wk) Client address: 880 Powder Mill Rd Wilmington, DE 19803 Years of experience required: 8+ · Develops and implements solutions that address ...

Judge Group, Inc.

Sr Mainframe Developer

Wilmington, DE · On-site

$50.50/hr

Our client is currently seeking a Sr Mainframe Developer Develops and implements solutions that address complex business challenges, enhancing the ability to make data-driven decisions and improving ...

Judge Group, Inc.

Sr Mainframe Developer

Wilmington, DE · On-site

$50.50/hr

Our client is currently seeking a Sr Mainframe Developer Years of experience required: 8+ Develops and implements solutions that address complex business challenges, enhancing the ability to make ...

Keylent

Mainframe Developer

Wilmington, DE · On-site

$47.50 - $61/hr

Role: Sr Mainframe Developer Location: Wilmington, DE Years of experience required: 8+ · Develops and implements solutions that address complex business challenges, enhancing the ability to make ...

TekCommands Inc

Sr Mainframe Developer

Wilmington, DE · On-site

... Programming including knowledge of CICS Screen Programming is Mandatory · Experience/Knowledge in building and maintaining new Test regions is preferred. · Experience coding in MQ Series & IMS DB ...

Monitise

Mainframe Sr. Advisor

Wilmington, DE · On-site

$121K - $193K/yr

Job Title Mainframe Sr. Advisor About your role: At Fiserv, we are dedicated to transforming ... As a Software Development Engineering - Sr Advisor I, you will play a critical role in leading the ...

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Senior Mainframe Developer information

See Delaware salary details

$38

$57

$66

How much do senior mainframe developer jobs pay per hour?

As of Aug 31, 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 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.

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 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 the most commonly searched types of Mainframe Developer jobs in Delaware?

The most popular types of Mainframe Developer jobs in Delaware are:

What are popular job titles related to Senior Mainframe Developer jobs in Delaware?

For Senior Mainframe Developer jobs in Delaware, the most frequently searched job titles are:

What job categories do people searching Senior Mainframe Developer jobs in Delaware look for?

The top searched job categories for Senior Mainframe Developer jobs in Delaware are:

What cities in Delaware are hiring for Senior Mainframe Developer jobs?

Cities in Delaware with the most Senior Mainframe Developer job openings:

What are popular job titles related to Senior Mainframe Developer jobs in DE?

For Senior Mainframe Developer jobs in DE, the most frequently searched job titles are:

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, 8% Part Time, and 14% Contract. Highlights an 79% Physical, 6% Hybrid, and 15% Remote job distribution, with an average salary of $120,019 per year, or $57.7 per hour.

Sr Mainframe Developer

Keylent

Wilmington, DE • On-site

Other

Posted 25 days ago

Job description

Sr Mainframe Developer with COBOL, JCL, VSAM, IMS, CICS & DB2, CICS Screen Programming, MQ Series & IMS DB 

Keylent logo

About Keylent

Sourced by ZipRecruiter

Keylent Inc, based in Wilmington, DE, US, operates in the dynamic IT services and solutions industry. Their official platform, keylent.com, further details their robust suite of services which primarily comprise software consulting, quality assurance, project management, and business intelligence. Keylent Inc has been an integral part of the industry since its inception, serving diverse clients with their specialized, innovative IT solutions. This customer-centric firm is founded on the core values of reliability, integrity, and zealous innovation. Their mission is to empower businesses in navigating the complex technological landscape with ease, efficiency, and confidence. Notably, Keylent Inc has been recognized for its commitment to exceptional service delivery and the profound impact of its solutions in facilitating business growth.

Industry

Internet and it

Company size

11 - 50 Employees

Headquarters location

Wilmington, DE, US

Year founded

2010

Social media

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