Senior Mainframe Developer/Lead

Avanciers Inc.; Delaware City (DE); On-site; USD 120,000 - 150,000; Full time

Job summary

Avanciers Inc. seeks a Senior Mainframe Developer/Lead with 10+ years of hands-on IBM z/OS experience to independently drive development initiatives and interact with client stakeholders.

The role covers COBOL, JCL, CICS, MQ, DB2, IMS DB, and related tools in a large enterprise environment, with strong emphasis on production support, code reviews, and agile delivery.

Qualifications

• 10+ years of hands-on Mainframe experience in IBM z/OS environments.
• Strong COBOL/JCL/CICS/DB2 skills with batch and real-time processing.
• Experience with debugging and production support in large enterprises.
• Exposure to distributed tech like Java, Kafka and REST/XML services.
• Proven ability to work with client stakeholders and drive initiatives independently.

Responsibilities

• Develop, maintain, and support COBOL/JCL/VSAM/CICS-based production code.
• Troubleshoot complex issues in production and non-prod environments.
• Perform code reviews and guide development teams.
• Automate recurring issues to improve stability and efficiency.
• Participate in Agile ceremonies, estimate work, document in JIRA.
• Adhere to enterprise standards, security, and risk controls.
• Collaborate with architects, analysts, and client stakeholders.
• Own development efforts with minimal supervision on large apps.

Skills

Mainframe development

COBOL

JCL

CICS

VSAM

DB2 SQL

IMS DB

DB2 Stored Procedures

REXX/CLIST

Xpediter

MQ

WebSphere MQ

Java

Kafka

REST Web Service

XML

Tools

CA-7

Intertest

File Aid

TSO/ISPF/SDSF

File Manager

Changeman

Job description

Role Overview

Job Title: Senior Mainframe Developer/Lead

Location : Onsite in Delaware

Duration: 4 months + (extension)

Start Date: ASAP

Job Summary

We are seeking an experienced Senior Mainframe Developer with 10+ years of hands‑on experience in IBM z/OS Mainframe technologies. The ideal candidate will be a self-starter who can independently manage deliverables, interact directly with client stakeholders, and drive development initiatives with minimal oversight. This role requires strong technical expertise across Mainframe development, database technologies, and production support within large enterprise environments.

Mainframe Skills

• Experience (10+ years) in developing, debugging, and maintaining code in a large corporate environment with IBM-Z/OS Mainframe applications
• Experience with Mainframe development suite, COBOL, JCL, CICS, MQ, VSAM including both batch and real-time processes.
• CICS Main view, REXX, CLIST Proficient in FTP/NDM/File-Mover, CA-7, IBM Utilities, Intertest, File Aid, TSO/ISPF/SDSF, File Manager, Changeman, SORT
• Experience with debug tools like Xpediter
• Strong Database design and development skills in IMS DB, DB2, DB2 SQL and Stored Procedures
• Experience with IBM WebSphere MQ messaging solution
• Exposure to distributed Technologies Java, Kafka, Rest Web Service, XML

Responsibilities

• Develop, maintain, and support secure, high-quality production code using COBOL, JCL, VSAM, DB2, and CICS.
• Analyse, troubleshoot, and resolve complex application issues in production and non-production environments.
• Perform code reviews and provide technical guidance to development teams.
• Identify opportunities to automate recurring issues and improve application stability and operational efficiency.
• Participate in Agile ceremonies, estimate user stories, and document development activities in JIRA.
• Ensure adherence to enterprise architecture standards, security policies, risk management controls, and development best practices.
• Collaborate with cross-functional teams, architects, business analysts, and client stakeholders.
• Drive development activities independently with minimal supervision.
• Support large-scale enterprise applications and mission-critical systems.

Preferred Qualifications

• Experience integrating Mainframe systems with distributed applications.
• Experience working in Agile/Scrum environments.
• Prior experience in banking, financial services, insurance, or large enterprise organisations.