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Mainframe Software Developer Jobs in Jacksonville, FL

Kavaliro

Mainframe Engineer - IBM

Jacksonville, FL · On-site

$45.25 - $58.25/hr

Kavaliro is looking for a Mainframe Engineer to join our Jacksonville-based client's team. This ... Install, maintain, and upgrade system software and ISV software. Manage and support virtual tape ...

Centraprise

Mainframe Developer

Jacksonville, FL · On-site

$45.50 - $58.25/hr

Must Have Technical/Functional Skills • COBOL, JCL, VSAM • CICS (online processing) • DB2 ,SQL • File utilities (IDCAMS, SORT, IEBGENER) • Debugging tool (Fault Analyzer ) • Job scheduler ...

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How much do mainframe software developer jobs pay per hour?

As of Jul 27, 2026, the average hourly pay for mainframe software developer in Jacksonville, FL is $49.46, according to ZipRecruiter salary data. Most workers in this role earn between $43.65 and $56.11 per hour, depending on experience, location, and employer.

What does a mainframe developer do?

A mainframe developer designs, codes, tests, and maintains software applications that run on large mainframe computers. They often work with languages like COBOL, PL/I, or Assembler and use tools such as IBM Z/OS. Their role involves ensuring the reliability, security, and efficiency of critical enterprise systems.

Is mainframe developer a good career?

Mainframe software developers work with legacy systems that are still critical in many industries such as finance and government. The role offers stable employment, competitive salaries, and opportunities to develop expertise in languages like COBOL and tools like JCL. However, the field is specialized, and ongoing learning of mainframe technologies and certifications can enhance career prospects.

How does a Mainframe Software Developer typically collaborate with cross-functional teams in a modern IT environment?

Mainframe Software Developers frequently work with cross-functional teams that include business analysts, system architects, QA testers, and DevOps engineers. Collaboration often involves participating in daily stand-ups, code reviews, and joint problem-solving sessions to ensure seamless integration of mainframe applications with newer technologies. Developers also play a key role in translating business requirements into robust mainframe solutions, and may be involved in mentoring junior developers or coordinating with offshore teams. This collaborative environment helps ensure that legacy systems remain aligned with evolving business needs and IT strategies.

What is a Mainframe Software Developer?

A Mainframe Software Developer is an IT professional who designs, develops, tests, and maintains software applications that run on mainframe computers. These developers typically work with programming languages such as COBOL, JCL, and Assembler, and are responsible for ensuring the performance and reliability of critical business systems used by large organizations. Mainframe Software Developers often collaborate with business analysts, project managers, and other IT staff to support and enhance legacy systems, as well as to integrate new technologies with existing mainframe infrastructure.

What is the difference between Mainframe Software Developer vs Mainframe Systems Analyst?

AspectMainframe Software DeveloperMainframe Systems Analyst
Required CredentialsBachelor's in Computer Science or related field, certifications like IBM Certified SpecialistBachelor's in IT, Computer Science, or related, often with certifications in mainframe systems
Work EnvironmentDevelops and codes mainframe applications, often in COBOL, PL/I, or AssemblerAnalyzes system requirements, designs solutions, and coordinates between users and developers
Employer & Industry UsageFinancial institutions, government agencies, large corporations using mainframe systemsSame industries, focusing on system analysis, requirements gathering, and process improvements

While Mainframe Software Developers focus on coding and building mainframe applications, Mainframe Systems Analysts analyze existing systems and gather requirements to improve or implement new solutions. Both roles are essential in mainframe environments and often collaborate closely.

Can mainframe be replaced by AI?

Mainframe software developers work with large-scale, legacy systems that require specialized knowledge of mainframe environments, programming languages, and security protocols. While AI can automate certain tasks like data analysis and testing, it is unlikely to fully replace mainframe systems or the developers who maintain them, as mainframes continue to support critical enterprise operations. Instead, AI tools are often integrated to enhance efficiency and modernize existing mainframe workflows.

What are the key skills and qualifications needed to thrive as a Mainframe Software Developer, and why are they important?

To thrive as a Mainframe Software Developer, you need expertise in COBOL, JCL, mainframe operating systems (such as z/OS), and a background in computer science or related fields. Familiarity with mainframe tools like IBM CICS, DB2, and version control systems, along with certifications such as IBM Certified System Programmer, is highly valued. Strong analytical thinking, problem-solving abilities, and effective communication set standout professionals apart in this field. These skills ensure the maintenance of critical legacy systems, support for business operations, and seamless integration with modern technologies.

What is the salary of a mainframe developer?

The salary of a mainframe software developer typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Senior developers with specialized skills in COBOL, JCL, or mainframe environments can earn higher salaries, often exceeding $130,000. Compensation may also include benefits such as bonuses and retirement plans.
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What cities near Jacksonville, FL are hiring for Mainframe Software Developer jobs? Cities near Jacksonville, FL with the most Mainframe Software Developer job openings:
Mainframe Software Developer jobs near you
Infographic showing various Mainframe Software Developer job openings in Jacksonville, FL as of July 2026, with employment types broken down into 77% Full Time, and 23% Contract. Highlights an 92% In-person, and 8% Remote job distribution, with an average salary of $102,873 per year, or $49.5 per hour.
Mainframe Engineer - IBM

Mainframe Engineer - IBM

Kavaliro

Jacksonville, FL • On-site

$45.25 - $58.25/hr

Full-time

Posted yesterday

Job description

Job Description
Kavaliro is looking for a Mainframe Engineer to join our Jacksonville-based client's team. This position will focus on implementing and managing IBM mainframe server hardware and software for on-premises environments. Additionally, the role will ensure the reliability and availability of production, non-production, and disaster recovery mainframe systems critical to business operations. Essential Responsibilities
  • Install, maintain, and upgrade system software and ISV software. Manage and support virtual tape backup systems and libraries. Provide troubleshooting, training, and technical support across the organization.
  • Address escalated issues from other support tiers, ensuring courteous and effective communication with users.
  • Serve as a subject matter expert, handling the most complex issues. Mentor and coach less experienced associates and provide backup support for management when needed.
  • Oversee the configuration and readiness of the disaster recovery mainframe site, including immutable storage systems. Participate in and execute disaster recovery exercises.
  • Ensure compliance with server, network, security, and engineering standards. Stay informed on emerging industry trends and best practices.
Required Knowledge, Skills & Abilities
  • Extensive expertise in IBM z/OS mainframe and related tools, including LPAR configuration, MQ Series, DB2, COBOL, JCL, VSAM, CICS, and mainframe ISV software.
  • Proficiency with IBM file structures (HFS, ZFS, PDS), TSO, and DFSMS.
  • Experience with IBM DS89xx disk subsystems, including daily operations, replication, flash copies, and immutable staging using tools like Copy Services Manager (CSM).
  • Strong understanding of networking technologies relevant to the mainframe, such as Ethernet and FICON.
  • Experience with z/OS virtualization, including zLinux installation and maintenance.
  • Knowledge of backup solutions and strategies.
  • Excellent communication, organizational, time management, and prioritization skills.
  • Ability to develop, teach, and mentor team members.
  • Capability to convey technical expertise to management and stakeholders effectively.
Preferred Knowledge, Skills & Abilities
  • Experience with virtual tape systems, including Luminex.
  • Knowledge of AIX operating systems.
  • Familiarity with LAN/WAN, Firewall, and VPN technologies.
  • Experience working with storage area networks.
  • In-depth knowledge of business continuity and disaster recovery strategies.
  • Strong ability to thrive in fast-paced and dynamic environments while meeting goals and deadlines.
Qualifications Education
  • Bachelor's Degree in Computer Science or a related field.
Experience
  • Minimum 8+ years of relevant experience.
  • Supervisory experience preferred.
Language Requirement
  • Proficiency in English.

Kavaliro provides Equal Employment Opportunities to all employees and applicants. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Kavaliro is committed to the full inclusion of all qualified individuals. In keeping with our commitment, Kavaliro will take the steps to assure that people with disabilities are provided reasonable accommodations. Accordingly, if reasonable accommodation is required to fully participate in the job application or interview process, to perform the essential functions of the position, and/or to receive all other benefits and privileges of employment, please respond to this posting to connect with a company representative.
Job Requirements
Remote
By using best practices and optimal employee recruiting strategies, Kavaliro provides employers with employment solutions by providing the most qualified and professional employees, who can staff both project and permanent positions in order to ensure the ongoing success of all types of businesses. We use a streamlined-yet-thorough approach to staffing that saves our clients administrative time, resources and money.

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