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Senior Mainframe Software Engineer Jobs in Colorado

247Hire

Senior Software Engineer

Greenwood Village, CO · On-site

$110 - $140/hr

Our client in Englewood Colorado is looking for a Senior Software Engineer on a direct hire basis. This is an opportunity to join a collaborative, fast-paced development team where your work will ...

ApplyMint

Senior Software Engineer

Denver, CO · On-site

$120 - $190/hr

Senior Software Engineer Location: San Francisco, CA or Denver, CO (Hybrid, 3 days/week). Salary: $120k-$190k + equity. Full-time. Offstream is building the infrastructure for the environmental ...

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$122K - $161K/yr

Senior Software Engineer, Level 3 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3 to support our customer in Littleton, CO. Summary:

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$120K - $150K/yr

Senior Software Engineer, Level 3OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3, to support our customer in Littleton, CO.Summary:

Booz Allen Hamilton

Software Engineer, Senior

Aurora, CO · On-site

$87 - $198/hr

Seeking a Senior Software Engineer to lead and support Agile design, development, integration and deployment of a mission management software for heterogeneous, proliferated satellite constellations.

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$120K - $150K/yr

Senior Software Engineer, Level 3 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3, to support our customer in Littleton, CO. Summary:

OASYS

Senior Software Engineer

Littleton, CO · Hybrid

$120K - $158K/yr

Senior Software Engineer, Level 3 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3, to support our customer in Littleton, CO. Summary:

OASYS

Senior Software Engineer

Littleton, CO · Hybrid

$120K - $158K/yr

Senior Software Engineer Staff, Level 5 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer Staff, Level 5 to support our customer in Littleton, CO.

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$180K - $230K/yr

Senior Software Engineer Staff, Level 5OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer Staff, Level 5 to support our customer in Littleton, CO.

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$180K - $230K/yr

Senior Software Engineer Staff, Level 5 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer Staff, Level 5 to support our customer in Littleton, CO.

OASYS

Senior Software Engineer

Littleton, CO · Hybrid

$120K - $158K/yr

Senior Software Engineer, Level 3 OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3 to support our customer in Littleton, CO. Summary:

OASYS, INC.

Senior Software Engineer

Littleton, CO · On-site

$120K - $150K/yr

Senior Software Engineer, Level 3OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior Software Engineer, Level 3 to support our customer in Littleton, CO.Summary:

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All JobsMainframe Software Engineer JobsSenior Mainframe Software Engineer JobsSenior Mainframe Software Engineer Jobs in Colorado

Senior Mainframe Software Engineer information

What is a senior mainframe software engineer?

Senior Mainframe Software Engineers are experienced professionals who design, develop, maintain, and optimize software applications running on mainframe computer systems. They typically work with legacy programming languages such as COBOL, PL/I, or Assembler, and are responsible for ensuring the reliability, scalability, and security of critical business applications. Their role often includes troubleshooting complex issues, integrating new technologies with existing systems, and mentoring junior engineers. These specialists are essential for organizations that rely on mainframes for large-scale data processing and transaction management.

What are the key skills and qualifications needed to thrive as a senior mainframe software engineer?

To thrive as a Senior Mainframe Software Engineer, you need deep expertise in COBOL, JCL, DB2, and mainframe architecture, often backed by a degree in computer science or related fields and several years of relevant experience. Familiarity with tools like IBM z/OS, CICS, RACF, and version control systems is typically required, along with certifications like IBM Certified System Programmer as a plus. Strong analytical thinking, problem-solving ability, and effective communication are crucial soft skills for leading projects and collaborating with cross-functional teams. These skills ensure reliable, secure, and efficient operation of critical legacy systems that are foundational to many large organizations.

What are some common challenges faced by senior mainframe software engineers when integrating legacy systems with modern technologies?

Senior Mainframe Software Engineers often encounter challenges when bridging legacy mainframe systems with newer technologies, such as ensuring compatibility, maintaining data integrity, and managing security risks. These integrations typically require a deep understanding of both the existing mainframe environment and the modern platforms being adopted. Collaboration with cross-functional teams, including application developers, architects, and business analysts, is essential to design effective solutions and minimize disruptions. Staying current with industry best practices and emerging tools can help address these challenges and ensure a smooth transition.

What is the difference between Senior Mainframe Software Engineer vs Mainframe Developer?

AspectSenior Mainframe Software EngineerMainframe Developer
CredentialsBachelor's in Computer Science or related, often with certifications like IBM Certified SpecialistSimilar educational background, often with certifications in mainframe technologies
Work EnvironmentLarge enterprise IT departments, financial institutions, government agenciesSame as Senior Mainframe Software Engineer, often within similar industries
ResponsibilitiesDesign, develop, and oversee mainframe applications; lead projects; troubleshoot complex issuesDevelop and maintain mainframe applications; focus on coding and debugging

While both roles involve mainframe technologies and similar credentials, Senior Mainframe Software Engineers typically have more leadership responsibilities and oversee projects, whereas Mainframe Developers focus primarily on coding and application maintenance.

What are popular job titles related to Senior Mainframe Software Engineer jobs in Colorado?

For Senior Mainframe Software Engineer jobs in Colorado, the most frequently searched job titles are:

What job categories do people searching Senior Mainframe Software Engineer jobs in Colorado look for?

The top searched job categories for Senior Mainframe Software Engineer jobs in Colorado are:

What cities in Colorado are hiring for Senior Mainframe Software Engineer jobs?

Cities in Colorado with the most Senior Mainframe Software Engineer job openings:

Senior Mainframe Software Engineer jobs near you

Senior Software Engineer

247Hire

Greenwood Village, CO • On-site

$110 - $140/hr

Other

Medical, Dental, Vision, Retirement, PTO

Posted 9 days ago

Job description

Our client in Englewood Colorado is looking for a Senior Software Engineer on a direct hire basis. This is an opportunity to join a collaborative, fast-paced development team where your work will directly influence the evolution of a cutting-edge technology platform. If you enjoy solving complex technical challenges, working with modern Microsoft technologies, and contributing to a product-driven environment, this is an excellent opportunity to make an impact.

Company Profile
  • Transportation Technology
  • Great team with a great company culture
  • Weekly team lunches
Senior Software Engineer Role
  • The Software Engineer will play a key role in designing, developing, and supporting enterprise-level applications within a collaborative Agile development environment.
  • Design, develop, and maintain scalable full-stack applications using modern Microsoft technologies
  • Build intuitive, user-friendly interfaces from product concepts, wireframes, or minimal design direction
  • Design and integrate complex software solutions across web, API, and mobile platforms
  • Support applications spanning web portals, APIs, and mobile technologies
  • Collaborate closely with Product Owners, Quality Assurance Engineers, and fellow developers throughout the software development lifecycle
  • Participate in Agile ceremonies including sprint planning, stand-ups, retrospectives, and code reviews
  • Contribute to architecture discussions, peer mentoring, and continuous process improvements
  • Research and implement emerging technologies that improve scalability, performance, and user experience
Senior Software Engineer Background Profile
  • 4+ years of professional software development experience using C#
  • 4+ years of experience developing with .NET Core 3.x or newer
  • 4+ years of experience with Entity Framework Core, SQL databases, HTML, and CSS
  • Experience with Blazor or another modern web application framework
  • Ability to design, implement, and integrate enterprise-level software solutions
  • Experience working with Azure DevOps or similar development platforms
  • Experience working within Agile development environments utilizing Git source control
  • Strong written and verbal communication skills
  • Self-motivated, detail-oriented, and deadline-driven
  • Comfortable participating in code reviews, technical discussions, and collaborative problem-solving
  • Passion for learning new technologies and continuously improving development practices
Features and Benefits
  • Medical
  • Dental Vision
  • PTO
  • 401k with match
  • Gym Membership
Senior Software Engineer Background Profile
  • 4+ years of professional software development experience using C#
  • 4+ years of experience developing with .NET Core 3.x or newer
  • 4+ years of experience with Entity Framework Core, SQL databases, HTML, and CSS
  • Experience with Blazor or another modern web application framework
  • Ability to design, implement, and integrate enterprise-level software solutions
  • Experience working with Azure DevOps or similar development platforms
  • Experience working within Agile development environments utilizing Git source control
  • Strong written and verbal communication skills
  • Self-motivated, detail-oriented, and deadline-driven
  • Comfortable participating in code reviews, technical discussions, and collaborative problem-solving
  • Passion for learning new technologies and continuously improving development practices
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About 247Hire

Sourced by ZipRecruiter

Industry

Recruiting and staffing services

Company size

201 - 500 Employees

Headquarters location

Oak Brook, IL, US

Year founded

2002

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