Senior Mainframe Engineer: Lead, Optimize & Mentor (Remote)

ensono; United States; Hybrid; USD 120,000 - 160,000; Full time

Benefits offered by this job

Unlimited PTO

Health plan options

401(k) with company match

Fertility coverage

Parental leave

Education reimbursement

Remote-first posture with WFH/onsite

Annual bonus plan

Job summary

Ensono is seeking a senior mainframe specialist to support, maintain, and enhance a suite of critical mainframe applications. This role blends hands-on coding with technical leadership, mentoring junior developers and serving as a subject-matter expert across enterprise application support.

You will design and optimize COBOL, CICS, JCL, DB2, and VSAM solutions, lead complex troubleshooting, and drive performance tuning within structured SDLC processes, including both waterfall and agile delivery.

Qualifications

• 8+ years of specialized experience in mainframe application development, support, and maintenance.
• Proficiency in COBOL, JCL, CICS, DB2, and VSAM.
• Strong command of SDLC methodologies.
• Hands-on experience with version control systems and modern software development tools.
• Comfort working across both waterfall and agile delivery models.
• Excellent problem-solving, analytical, and interpersonal communication skills.

Responsibilities

• Design, develop, and maintain mainframe applications using COBOL, CICS, JCL, DB2, and VSAM.
• Lead complex troubleshooting and resolution for application and integration issues.
• Conduct performance tuning and optimization of mainframe applications and database queries.
• Manage incidents, service requests, and change requests through enterprise ticketing systems such as ServiceNow.
• Translate functional and technical requirements into implementation options that align with business needs.
• Author and maintain technical documentation, including knowledge-base articles and standard operating procedures.

Job description

Ensono is seeking a senior mainframe specialist to support, maintain, and enhance a suite of critical mainframe applications. This role blends hands-on coding with technical leadership, mentoring junior developers and serving as a subject-matter expert across enterprise application support.

You will design and optimize COBOL, CICS, JCL, DB2, and VSAM solutions, lead complex troubleshooting, and drive performance tuning within structured SDLC processes, including both waterfall and agile delivery.