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Mainframe Developer Jobs in Washington (NOW HIRING)

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One Holdings, LLC

Java Mainframe Developer

Vienna, VA · On-site

$57.50 - $73.25/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One Holdings, LLC

Java Mainframe Developer

Vienna, VA · On-site

$57.50 - $73.25/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · On-site

$57.50 - $73.25/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

System One

Java Mainframe Developer

Vienna, VA · Remote

$58.50 - $74.75/hr

Java Developer Location: Remote Type: Contract Responsibilities * Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on ...

Samprasoft

Mainframe Infrastructure Engineer

Washington, DC · On-site

$62.25 - $79.25/hr

Senior Mainframe Systems Programmer 8-10 years' experience of senior mainframe systems programmer background is required. Infrastructure engineer with hands-on experience. Building robust mainframe ...

Diamondpick

Mainframe Infra Engineer

Mclean, VA · On-site

Mainframe Infra Engineer $85 Hybrid - McLean, VA Client Kit BGV must be cleared to start Job Title Mainframe z/OS Technical Lead / L3 Engineer We are seeking a senior Mainframe Z/OS Technical Lead to ...

Saransh Inc

Mainframe Infra Engineer (z/OS) - Only W2

Mclean, VA · On-site

$49.50 - $63.75/hr

Role: Mainframe Infra Engineer (Mainframe z/OS Technical Lead / L3 Engineer) Location: McLean, VA (Hybrid) Job Type: W2 Contract Skill Matrix: Name Required IMS Yes DB2 Yes JCL Yes Cobol Yes ...

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Kaav Inc.

Mainframe z/OS System Programmer

Bethesda, MD · On-site

$59 - $75/hr

IBM z15 and z16 Mainframe and z/OS 2.5 or Higher Operating System Support Supporting IBM z15 and ... Primary tasks include MVS systems programming activities such as system security compliance to ...

ClifyX

Systematics / Mainframe support engineer

Mclean, VA · On-site

$50.25 - $64.75/hr

Systematics / Mainframe Support Engineer Provide relief to the production support team and assist with automation. Required experience: Service Now knowledge, Jenkins, experience with automation ...

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All JobsMainframe Developer JobsMainframe Developer Jobs in Washington

Mainframe Developer information

See Washington salary details

$11

$60

$81

How much do mainframe developer jobs pay per hour?

As of Jul 1, 2026, the average hourly pay for mainframe developer in Washington is $60.46, according to ZipRecruiter salary data. Most workers in this role earn between $53.37 and $68.61 per hour, depending on experience, location, and employer.

What is the difference between Mainframe Developer vs Mainframe Analyst?

AspectMainframe DeveloperMainframe Analyst
Primary RoleDesigning, coding, and testing mainframe applicationsAnalyzing and maintaining existing mainframe systems
Skills & CertificationsCOBOL, JCL, DB2, certifications like IBM Certified DeveloperCOBOL, JCL, system analysis, troubleshooting skills
Work EnvironmentDevelopment teams, coding in mainframe environmentsSupport teams, system analysis, user support
Industry UsageFinancial services, insurance, government agenciesFinancial institutions, healthcare, government agencies

While Mainframe Developers focus on creating and implementing mainframe applications, Mainframe Analysts primarily analyze, troubleshoot, and maintain existing systems. Both roles require similar technical skills and often work within the same industries, but their core responsibilities differ in development versus support and analysis.

What are some common challenges Mainframe Developers face when integrating legacy systems with modern applications?

Mainframe Developers often encounter challenges such as ensuring compatibility between legacy systems and newer technologies, managing data migration without disrupting business operations, and maintaining the security of sensitive data. Effective communication with cross-functional teams, such as application developers and infrastructure engineers, is essential to address these challenges. Staying updated on both mainframe and modern programming practices helps ease integration and ensures long-term system reliability.

What are Mainframe Developers?

Mainframe Developers are specialized software engineers who design, develop, maintain, and troubleshoot applications on mainframe computer systems, such as IBM's z/OS. They typically work with languages like COBOL, JCL, and CICS, and are responsible for ensuring the performance, security, and reliability of mission-critical business applications. Mainframe Developers are commonly employed in industries like banking, insurance, and government, where large-scale, high-volume transaction processing is essential.

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

To thrive as a Mainframe Developer, you need expertise in programming languages such as COBOL, JCL, and SQL, along with a strong understanding of mainframe operating systems and batch processing concepts. Familiarity with tools like IBM z/OS, DB2, CICS, and version control systems is typically required, and certifications from IBM or related organizations can be beneficial. Strong problem-solving abilities, attention to detail, and effective communication skills help Mainframe Developers excel in troubleshooting and collaborating with cross-functional teams. These skills are crucial for maintaining, optimizing, and modernizing legacy systems that are vital to many large organizations’ operations.
What are the most commonly searched types of Mainframe Developer jobs in Washington? The most popular types of Mainframe Developer jobs in Washington are:
What are popular job titles related to Mainframe Developer jobs in Washington? For Mainframe Developer jobs in Washington, the most frequently searched job titles are:
What job categories do people searching Mainframe Developer jobs in Washington look for? The top searched job categories for Mainframe Developer jobs in Washington are:
What cities in Washington are hiring for Mainframe Developer jobs? Cities in Washington with the most Mainframe Developer job openings:
What are popular job titles related to Mainframe Developer jobs in WA? For Mainframe Developer jobs in WA, the most frequently searched job titles are:
Mainframe Developer jobs near you
Infographic showing various Mainframe Developer job openings in Washington as of June 2026, with employment types broken down into 80% Full Time, 12% Part Time, and 8% Contract. Highlights an 85% Physical, 5% Hybrid, and 10% Remote job distribution, with an average salary of $125,748 per year, or $60.5 per hour.
Java Mainframe Developer

Java Mainframe Developer

System One

Vienna, VA • Remote

$58.50 - $74.75/hr

Contractor

Medical, Dental, Vision, Life, Retirement

Posted 14 days ago

Job description

Job Title: Java Developer Location: Remote Type: Contract

Responsibilities

  • Design, develop, and enhance complex software applications supporting mission-critical, time-sensitive initiatives focused on integrating distributed applications with the organization's Core Banking platform.
  • Translate business and platform requirements into secure, scalable, and reliable solutions throughout the full software development lifecycle.
  • Operate with minimal supervision while exercising strong technical judgment.
  • Collaborate with Core Banking, testing, middleware, and platform teams to manage dependencies, mitigate risks, and meet aggressive delivery timelines.
  • Design, develop, and optimize high-quality software applications using advanced programming languages and frameworks that meet business needs.
  • Gather and analyze requirements, translate into technical specifications, propose solutions, and ensure timely task completion.
  • Write clean, scalable, and maintainable code adhering to best practices and organizational standards.
  • Implement data structures and algorithms efficiently to optimize performance and user experience.
  • Identify, troubleshoot, and resolve application errors.
  • Conduct code reviews, provide feedback, and learn from colleagues to maintain high-quality codebase.
  • Lead small efforts, fostering relationships with stakeholders and team members.
  • Contribute to development policies, standards, and procedures for applications and software.
  • Continuously learn and improve through collaboration and feedback.
Requirements
  • Bachelor’s degree in Computer Science, Information Systems, or a related field, or equivalent experience.
  • 0 or more years of experience in application or software development.
  • Proficiency in software development principles, methodologies (including Agile), pipelines, and version control systems (Git and GitHub).
  • Expertise in Java, XML, Open API, Maven, and ANT, with knowledge of modern frameworks and libraries.
  • Strong understanding of web technologies and capacity to design scalable solutions.
  • Excellent problem-solving, analytical, and troubleshooting skills.
  • Effective written and verbal communication skills for technical and non-technical stakeholders.
  • Experience with incident tracking, project management, and change control tools.
  • Understanding of data structures and algorithms for application performance and scalability.
  • Experience developing web services, microservices, REST and SOAP APIs, and implementing REST principles.
  • Ability to write and maintain unit and integration tests and troubleshoot software defects.
  • Familiarity with CI/CD pipelines and web APIs like Apache HTTP Client, JAX-WS, JAX-RS.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

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Ref: #851-Rockville-S1

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