Senior Mainframe Developer

Posted Yesterday
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Hiring Remotely in United States
Remote or Hybrid
102K-148K Annually
Senior level
Cloud • Information Technology
Support mission critical workloads, modernize IT infrastructure and reduce total cost of ownership.
The Role
Design, develop, support, and maintain enterprise mainframe applications using COBOL, CICS, IMS, DB2, MQ, VSAM and Netron Frame. Troubleshoot complex integrations, perform performance tuning, manage incidents/service/change requests, create technical documentation, and work within SDLC using ticketing systems and both waterfall and agile methodologies.
Summary Generated by Built In

At Ensono, our Purpose is to be a relentless ally, disrupting the status quo and unleashing our clients to Do Great Things!  We enable our clients to achieve key business outcomes that reshape how our world runs. As an expert technology adviser and managed service provider with cross-platform certifications, Ensono empowers our clients to keep up with continuous change and embrace innovation.
We can Do Great Things because we have great Associates. The Ensono Core Values unify our diverse talents and are woven into how we do business. These five traits are the key to achieving our purpose:
 
Honesty, Reliability, Curiosity, Collaboration, and Passion.

We want all new Associates to succeed in their roles at Ensono. That's why we've outlined the job requirements below. To be considered for this role, it's important that you meet all Required Qualifications. If you do not meet all of the Preferred Qualifications, we still encourage you to apply. 

  • Design, develop, and maintain Mainframe applications using COBOL, CICS, IMS DB/DC, DB2, MQ and VSAM.
  • Experience in Netron Frame technology.
  • Experience in enterprise-level ticketing systems (ServiceNow, Service Manager, etc.) and their operational workflows.
  • Worked on waterfall and agile methodology projects; capable of handling - Incidents, Service Requests and Change Requests simultaneously.
  • Provide technical troubleshooting and resolution for complex application and integration.
  • Conduct performance tuning and optimization of Mainframe applications and database queries.
  • Develop technical documentation (Knowledge Base articles, SOPs) for business and support teams
  • Understand both functional and technical requirements and provide implementation/change options aligned with business needs.
  • undefined
  • Education: Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related field.
  • Experience: Extensive experience in mainframe application development, support and maintenance
  • Technical Skills: Proficiency in mainframe technologies such as COBOL, JCL, CICS, DB2, IMS DC/DB, MQ and VSAM, Netron Frame Technology. Strong understanding of software development life cycle (SDLC) methodologies. Experience with version control systems and software development tools.
  • Soft Skills: Excellent problem-solving and analytical skills. Strong communication and interpersonal skills. Ability to work independently and as part of a team.
Why Ensono?

Ensono is a place to make better happen – for our clients and for your career. You can do great things through innovation or collaboration, by learning or volunteering, or to promote diversity and inclusion. You can do great things for your own health or for a healthier planet. Whatever it means to you to do great things we want Ensono to be the place you can do it. 

We are a client-facing business, but we do encourage clients to allow us to work remotely most of the time so if you are not required to be on a client site, you can choose to work from home or in our Ensono offices.

Some of our benefits include:

  • Unlimited Paid Days Off
  • Three health plan options
  • 401k with company match
  • Eligibility for dental, vision, short and long-term disability, life and AD&D coverage, and flexible spending accounts
  • Family Forming Benefit including fertility coverage and adoption/surrogacy reimbursement
  • Paid childbearing and paternal leave
  • Education Reimbursement, Student Loan Assistance or 529 College Funding
  • Sabbatical leave
  • Wellness program
  • Flexible work schedule

As of the date of this posting, a good faith estimate of the current pay scale for this role is $102,000 to $148,000 annually based on a full-time schedule. Please note that placement in the range may vary based on numerous factors including but not limited to skills, experience, internal equity, and business needs. In addition to base salary, other compensation programs, depending on eligibility, include an annual bonus plan based on company and individual performance and an equity grant under our Associate Equity Appreciation Program.

Ensono is an Equal Opportunity/Affirmative Action employer. We are committed to providing equal employment to our Associates and building a diverse and inclusive workforce. All qualified applicants will be considered without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability, or other legally protected basis, in accordance with applicable law.

Pay transparency nondiscrimination statement/posting OFCCP’s pay transparency policy can be found on OFCCP’s website.

If you need accommodation at any point during the application or interview process, please let your recruiter know or email [email protected].

Skills Required

  • Proficiency in COBOL
  • Experience with JCL
  • Experience with CICS
  • Experience with IMS DB/DC
  • Experience with DB2
  • Experience with MQ
  • Experience with VSAM
  • Experience with Netron Frame technology
  • Experience with enterprise-level ticketing systems (e.g., ServiceNow, Service Manager) and operational workflows
  • Experience working in both waterfall and agile methodologies
  • Ability to handle Incidents, Service Requests, and Change Requests simultaneously
  • Technical troubleshooting and resolution for complex applications and integrations
  • Performance tuning and optimization of mainframe applications and database queries
  • Develop technical documentation (Knowledge Base articles, SOPs)
  • Bachelor's or Master's degree in Computer Science, Information Technology, or related field
  • Extensive experience in mainframe application development, support, and maintenance
  • Experience with version control systems and software development tools
  • Strong problem-solving, communication, and interpersonal skills; ability to work independently and in a team

Ensono Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Ensono and has not been reviewed or approved by Ensono.

  • Leave & Time Off Breadth Time off provisions include unlimited PTO, paid volunteer time, and a formal sabbatical program. These offerings provide flexibility for rest, community service, and extended renewal.
  • Retirement Support Retirement support includes a 401(k) with company match as part of the core package. This adds long‑term financial value alongside day‑one eligibility for other coverage.
  • Parental & Family Support Family‑forming coverage and paid parental leave are explicitly included, with adoption and surrogacy reimbursement. These benefits support diverse paths to growing a family.

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The Company
HQ: Downers Grove, IL
3,000 Employees
Year Founded: 2015

What We Do

Ensono helps IT leaders be the catalyst for change by harnessing the power of hybrid IT to transform their businesses. Our broad services portfolio from mainframe to cloud, powered by an intelligent governance platform, is designed to help our clients operate for today and optimize for tomorrow. We are award-winning certified experts in AWS & Azure

Why Work With Us

Our culture is collaborative & results-driven. Curiosity, passion, honesty & reliability are values we live by. Career & professional development is encouraged through promotions, learning opportunities, Ensono University - eTalks, training academies, paid tuition and study leave, quarterly Innovator Awards. Thinking Thursdays (no meetings 8 to 12)

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