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Senior IBM Mainframe Developer with Cobol
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Offer summary

(Summary generated by AI based on the full job description)

The project involves mission-critical systems in banking and insurance using IBM Mainframe, COBOL, JCL, CICS, z/OS. It requires analysis of requirements, development and optimization of applications and DB2 queries, incident resolution, and performance improvement. Responsibilities include development, maintenance, deployment support, and collaboration in an international team. Benefits include private healthcare, sports cost sharing, and training support.

you can start ASAP

Senior IBM Mainframe Developer with Cobol

Company: YOUR ITEAMS sp. z o.o.

from: 30 July 2026
to: 29 August 2026
160 - 200 złnet (+ VAT)/ hr.B2B contract (full-time)
Offer parameters
level:senior
working mode:remote
location:Warszawa, Masovian
Warszawa, Masovian

Requirements

Expected technologies

COBOL
JCL
CICS
DB2
Git
Bitbucket

Operating system

Windows

Our requirements

  • Minimum five years of professional experience in development and maintenance of applications on the IBM Mainframe platform.
  • Strong practical knowledge of COBOL, JCL, CICS and z/OS.
  • Hands-on experience with DB2, including SQL development, query optimisation and data analysis.
  • Proven ability to independently design and implement effective technical solutions to meet business needs.
  • Experience troubleshooting production issues and optimising existing applications.
  • Proactive, self-driven approach with a clear sense of ownership and accountability.
  • Strong collaboration and communication skills suitable for international project teams.
  • English language proficiency at B1 level or higher.
  • Desirable: experience with Git, Bitbucket and CI/CD practices in mainframe environments; background in banking, financial services or insurance; familiarity with mainframe modernisation initiatives and AI-driven software development solutions; experience mentoring junior developers.

Your responsibilities

  • Analyse business requirements and translate them into technical specifications and implementation plans.
  • Design, develop and maintain mainframe applications using COBOL, JCL and CICS on z/OS.
  • Develop and optimise DB2 SQL queries and participate in database design and performance tuning.
  • Troubleshoot and resolve production incidents, perform root cause analysis and implement corrective measures.
  • Improve application performance, reliability and maintainability through code review and refactoring.
  • Collaborate with cross-functional teams and stakeholders in an international project environment.
  • Contribute to knowledge sharing, documentation and adoption of best practices.
  • Support testing, deployment and operation activities, and participate in on-call rotations if required.

About the project

As a Senior IBM Mainframe Developer you will join a team of experienced specialists responsible for the development and maintenance of mission-critical systems on IBM Mainframe technologies. They will design, develop and enhance complex business applications that support daily operations for clients in banking, insurance and other highly regulated industries. The role requires analysis of business requirements, implementation of solutions and optimisation of applications to ensure reliability, performance and security of key processes.

This is how we work on a project

  • Continuous Deployment
  • Continuous Integration
  • DevOps
  • documentation
  • issue tracking tools
  • testing environments
We encourage qualified candidates to apply via the application form. Applicants will be considered on the basis of their skills and experience.
Company

What we offer

  • Work within a team of senior specialists on high-importance, regulated-industry projects.
  • Opportunities for professional development and exposure to mainframe modernisation practices.
  • Collaborative, international project environment with cross-border stakeholders.
  • Accountability for technically significant systems and direct impact on operational quality.

Benefits

  • sharing the costs of sports activities
  • private medical care
  • sharing the costs of professional training & courses
  • remote work opportunities
  • flexible working time
  • integration events

Recruitment stages

  • 1.
    CV Screening
  • 2.
    Initial Interview (Online)
  • 3.
    Skills Assessment (Remote)
  • 4.
    Final Interview & Offer

YOUR ITEAMS sp. z o.o.

Our business philosophy had been clarifying for a good few years, during which we gained experience in large and influential corporations. Based on well-established knowledge and best practices, we decided to build a Teal organisation in which we can fully:
  • realize our mutual passion for IT,
  • professionally support our clients in this area,
  • use the best standards born from our experience,
  • have fun creating a harmonious community,
  • stay true to our values and treat every person with respect,
  • say goodbye to hierarchical treatment and lack of empowerment,
  • have a smile on our lips when we think about the next Monday,

    • This is how we work

    Senior IBM Mainframe Developer with Cobol
    160–200 zł / hr. (B2B)
    I apply to:
    YOUR ITEAMS sp. z o.o.
    Warszawa, Masovian
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