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Senior Mainframe Developer Jobs in Florida (NOW HIRING)

Hirekeyz Inc

Senior Mainframe Developer

Tampa, FL · On-site

Job Title: Senior Mainframe Developer Location : Tampa, FL (5 Days Onsite) Job Type: W-2/Full Time Exp-10 Years Role Overview We are seeking a highly experienced Mainframe Developer with deep ...

Citigroup, Inc.

Senior Mainframe Developer

Jacksonville, FL · On-site

$113K - $170K/yr

The Senior Mainframe Developer is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology team. The ...

Ubertal Inc

Senior Power BI Developer

Tallahassee, FL · On-site

Senior Power BI Developer Location: Tallahassee, FL (On-site, 5 days/week) Duration: ~13 months ... Convert WebFOCUS and Mainframe FOCUS queries to T-SQL * Create database views and stored procedures ...

Dtcc

Lead Platform Engineer*

Pensacola, FL · Hybrid

$96K - $127K/yr

Job Title Mainframe Engineer At DTCC, we're always looking for exceptional talent to join our team ... Senior Associate Level- Candidates must be 2-3 years post-college graduates with at least 1-2 year ...

Visium Resources, Inc.

Senior Software Developer

Miami, FL · On-site

$49.50 - $65.50/hr

The selected Senior Software Developer will be responsible for transitioning legacy systems (PEN, MS Access, Mainframe) into Goldkey, ensuring data integrity and validation throughout the migration ...

Ubertal Inc

Senior Business Analyst

Tallahassee, FL · On-site

$87K - $113K/yr

Senior Business Analyst Location: Tallahassee, FL Duration: 15 months Employment Type: Contract We ... Knowledge of mainframe programming languages and systems * Experience with data conversion and data ...

JS Consulting

Senior Software Developer - W2 ONLY

Miami, FL · On-site

$52.25 - $68.75/hr

Senior .Net Developer Location: Maimi, FL (Need Local) Duration: 12+Months Interview: WebEx Client ... The consultants will be responsible for transitioning legacy systems (PEN, MS Access, Mainframe ...

DSNSearch

z/OS Systems Programmer

Orlando, FL · On-site

z/OS SENIOR LEVEL SYSTEMS PROGRAMMER-ARCHITECT Z/OS**MAINFRAME**SYSTEMS PROGRAMMER** ANNUAL BONUS PROGRAM! HYBRID WORK/MUST WORK ON SITE 2X WEEK * SENIOR LEVEL Z/OS ARCHITECT EXPERT WITH Z/OS SYSTEMS ...

Tech Tammina LLC

Sr Backend Java Developer

Tampa, FL · On-site

$113K - $147K/yr

Role: Sr Backend Java Developer Location: Tampa, FL Duration: 6 months C2H Rate: Market Need only ... Modernization - re-write mainframe legacy applications into modern Java-based microservices to ...

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Senior Mainframe Developer information

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How much do senior mainframe developer jobs pay per hour?

As of Jun 9, 2026, the average hourly pay for senior mainframe developer in Florida is $43.08, according to ZipRecruiter salary data. Most workers in this role earn between $40.43 and $47.07 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 are Senior Mainframe Developers?

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 the most commonly searched types of Mainframe Developer jobs in Florida? The most popular types of Mainframe Developer jobs in Florida are:
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What job categories do people searching Senior Mainframe Developer jobs in Florida look for? The top searched job categories for Senior Mainframe Developer jobs in Florida are:
What cities in Florida are hiring for Senior Mainframe Developer jobs? Cities in Florida with the most Senior Mainframe Developer job openings:
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Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Florida as of June 2026, with employment types broken down into 10% As Needed, 27% Full Time, 27% Part Time, 12% Temporary, and 24% Contract. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution, with an average salary of $89,612 per year, or $43.1 per hour.

Senior Mainframe Developer

Hirekeyz Inc

Tampa, FL • On-site

Contractor

Posted 16 days ago

Job description

Job Title: Senior Mainframe Developer

Location : Tampa, FL (5 Days Onsite)

Job Type: W-2/Full Time

Exp-10 Years

Role Overview

We are seeking a highly experienced Mainframe Developer with deep expertise in COBOL, CICS, DB2, and JCL to support and enhance mission-critical applications. The candidate will play a key role in development, maintenance, production support, and modernization initiatives in a high-volume enterprise environment.

Key Responsibilities

  • Design, develop, test, and maintain mainframe applications using COBOL, CICS, DB2, and JCL
  • Analyze business requirements and translate them into technical specifications
  • Perform impact analysis and support system enhancements and upgrades
  • Develop and optimize DB2 SQL queries, stored procedures, and performance tuning
  • Handle production support, incident resolution, and root cause analysis
  • Work on batch and online (CICS) processing systems
  • Prepare functional and technical design documents
  • Collaborate with cross-functional teams including QA, business analysts, and infrastructure teams
  • Participate in code reviews, testing (unit, integration, UAT), and deployment activities
  • Ensure adherence to coding standards, security policies, and SLA commitments

Required Technical Skills

  • Strong hands-on experience in:
    • COBOL (Structured & Object-Oriented)
    • CICS (Customer Information Control System)
    • DB2 (SQL, Stored Procedures, Performance Tuning)
    • JCL (Job Control Language)
  • Experience with:
    • VSAM, IMS (optional but preferred)
    • Mainframe utilities (SORT, IDCAMS, IEBGENER)
    • Debugging tools like Expeditor, Abend-AID
  • Knowledge of:
    • Batch processing and scheduling tools (e.g., Control-M, CA-7)
    • Version control tools (Endevor, Changeman)
  • Familiarity with mainframe modernization or API integration is a plus

Soft Skills

  • Strong analytical and problem-solving skills
  • Excellent communication and stakeholder management
  • Ability to work in a fast-paced production support environment
  • Team player with mentoring capabilities

Preferred Qualifications

  • Bachelor’s degree in Computer Science, Information Technology, or related field
  • Experience in banking, financial services, or insurance domains
  • Exposure to Agile/Scrum methodologies
  • Experience in modernization initiatives (Mainframe to distributed/cloud)

Nice to Have

  • Knowledge of REST APIs, Microservices integration with mainframe
  • Experience with DevOps tools and CI/CD pipelines for mainframe
  • Exposure to tools like z/OS Connect, IBM MQ