Senior Software Engineer – Mainframe

Jobtailor; Denver (CO); On-site; USD 85,000 - 125,000; Full time

Job summary

Jobtailor seeks a skilled mainframe software developer to design, build, and maintain COBOL/JCL/ISPF applications on MVS/OS 390. The role focuses on EFT settlement and transaction processing within the financial sector.

The ideal candidate has 5+ years in related fields, strong debugging and problem-solving skills, and familiarity with scheduling tools like ESP/CA7. A master’s or bachelor’s degree is preferred.

Qualifications

• Master's or Bachelor's degree in a related field plus experience requirement.
• Development experience in COBOL, JCL, ISPF is required.
• MVS/OS 390 batch application development experience is required.
• Experience with ESP, CA7 or another scheduling software is required.
• Experience with FILE-AID and Connex/Advantage is required.
• Experience with a Settlement/Reporting application in the Financial sector.
• Ability to solve complex software development/design issues.
• Ability to write clean, coherent code following guidelines.
• Strong analytical and problem-solving skills.
• Knowledge of EFT settlement and transaction processing.
• AI and LLM knowledge is highly desirable.

Responsibilities

• Collaborate with stakeholders to interpret requirements and feed back into designs.
• Translate business requirements and verify assumptions with stakeholders.
• Contribute to project estimation and flag potential delays.
• Develop, implement, and maintain code per standards and best practices.
• Use debugging tools to verify assumptions and flag issues early.
• Participate in code reviews to ensure coding standards.
• Manage end-to-end lifecycle of enhancements with cross-functional teams.
• Leverage developer tools to create, debug, and maintain code.
• Prepare technical documents, build environments, and implementation plans.
• Identify opportunities for future enhancements and refinement of standards.

Skills

Analytical skills

Problem-solving skills

Education

Master's degree in Math, Science, Engineering, or Computer Science, Information Systems or related field

Bachelor's degree in Math, Science, Engineering, or Computer Science, Information Systems or related field

Tools

COBOL

JCL

ISPF

ESP

CA7

FILE-AID

Connex/Advantage

Settlement/Reporting Apps

Transaction Processing

Coding Guidelines

Job description

• Collaborate with stakeholders to interpret requirements for project components and incorporate feedback into future designs or solution fixes.
• Translate business requirements by verifying assumptions and escalating potential design issues to appropriate stakeholders.
• Contribute to project estimation and upscale issues that may cause delays.
• Develop, implement, and maintain code for products, services, or components, applying coding patterns, guidelines, and best practices.
• Apply debugging tools to verify assumptions and proactively flag issues before they occur.
• Participate in code reviews to ensure coding standards are followed and address routine pull requests.
• Manage end-to-end lifecycle of application enhancements by working with architects, systems analysts, project managers, QA and other developers to successfully implement projects.
• Leverage and build knowledge of software developer tools to create, debug, and maintain code for components.
• Prepare technical documents, develop code, review code, build environment, review test results, and prepare plan for implementation.
• Identify opportunities for future enhancements and refinements to standards, best practices and development methodologies.

Requirements

• Master's degree in Math, Science, Engineering, or Computer Science, Information Systems or related field
• OR Bachelor's degree in Math, Science, Engineering, or Computer Science, Information Systems or related field AND minimum two (2) years of experience in a directly related field
• OR Minimum five (5) years of directly related experience.
• Development experience in COBOL, JCL, ISPF required
• Development experience on MVS/OS 390 batch application required
• Development experience using ESP, CA7 or another scheduling software
• Development experience using FILE-AID
• Development experience with Connex/Advantage settlement application or equivalent
• Development experience with a Settlement/Reporting application in the Financial sector
• Ability to solve complex software development/design issues
• Ability to write clean, coherent code following established coding guidelines
• Strong analytical and problem-solving skills
• Good knowledge of EFT settlement and transaction processing
• Hands-on knowledge of Artificial Intelligence (AI) and Large Language Models (LLM) is highly desirable.

Core Competencies

Demonstrates expertise in COBOL, JCL, and MVS/OS 390 batch application development, with a strong focus on coding best practices and debugging. Proficient in managing application enhancements and collaborating with cross-functional teams in the financial sector.

Highest-signal resume keywords

• COBOL Development
• MVS/OS 390 Batch Application Development
• EFT Settlement Knowledge
• Analytical Problem-Solving
• Artificial Intelligence (AI) Knowledge

Hard Skills

• COBOL
• JCL
• ISPF
• ESP
• CA7
• FILE-AID
• Connex/Advantage
• Settlement Application Development
• Transaction Processing
• Coding Guidelines

Soft Skills

• Analytical Skills
• Problem-Solving Skills

Industry Keywords

• Financial Sector
• EFT Settlement
• Transaction Processing
• Software Development
• Development Methodologies

Tools & Technologies

• Scheduling Software
• Debugging Tools
• Software Developer Tools