Senior Software Engineer - Mainframe

About the role

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 – Passion. This role requires a highly skilled and experienced Senior Mainframe Developer with 8+ years of specialized technical experience to support, maintain, and enhance a suite of mainframe applications. The ideal candidate will have deep expertise in mainframe technologies, middleware, databases, and DevOps practices, with a strong understanding of enterprise application support and will act as a technical lead, responsible for maintaining, enhancing, and supporting critical mainframe applications while guiding junior team members.

Responsibilities

• Design, develop, and maintain Mainframe applications using COBOL, CICS, JCL, DB2, and VSAM.
• 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.

Requirements

• 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, and VSAM. 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. US Citizen.

Benefits

• 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

Pay

As of the date of this posting, a good faith estimate of the current pay scale for this role is $106,000 to $130,000 annually based on a full‑time schedule. Placement in the range may vary based on skills, experience, internal equity, and business needs. In addition to base salary, other compensation programs include an annual bonus plan based on company and individual performance and an equity grant under the Associate Equity Appreciation Program.

Schedule

Ensono encourages remote work when not required on a client site, offering a flexible work schedule and the option to work from home or in Ensono offices.