Project description

We are seeking an experienced Senior COBOL Developer with deep expertise in mainframe technologies to design, maintain, and modernize large-scale legacy systems. The role involves end-to-end ownership of batch and online applications, reverse engineering complex legacy logic, resolving production issues, and ensuring high performance, stability, and business continuity. Strong business understanding—especially in Life Insurance and Pensions domains—is highly desirable.

Responsibilities

Application Development & Maintenance

Design, develop, enhance, and maintain COBOL applications (Batch and Online).

Work extensively with CICS, JCL, DB2, and IMS to support enterprise-scale systems.

Ensure adherence to coding standards, security practices, and mainframe best practices.

Perform impact analysis and effort estimation for enhancements and defect fixes.

Batch & Online Production Support

Provide L2/L3 production support for batch jobs and online transactions.

Analyze and resolve abend issues, data inconsistencies, and performance bottlenecks.

Handle high-priority incidents with minimal turnaround time and root cause analysis.

Coordinate with infrastructure, DBAs, and operations teams during production issues.

Legacy Code Analysis & Reverse Engineering

Reverse engineer complex and undocumented legacy logic to understand business rules.

Modernize, refactor, or optimize existing code while preserving business behavior.

Create and maintain technical documentation, flow diagrams, and decision logic.

Business & Domain Collaboration

Work closely with business analysts and stakeholders to clarify requirements.

Translate business requirements into technical designs and solutions.

Apply strong domain knowledge (Life Insurance / Pensions) to ensure correct implementation of regulatory, policy, and financial rules.

Support audits, compliance checks, and regulatory-driven changes.

Performance Tuning & Non‑Functional Quality

Identify and resolve performance issues in batch and online environments.

Tune SQL queries, DB2 access paths, and file processing logic.

Handle non-functional defects related to performance, scalability, availability, and resilience.

Support system upgrades, migrations, or mainframe modernization initiatives.

Mentorship & Technical Leadership

Act as a technical SME for mainframe systems and legacy applications.

Mentor junior developers and reviewers on COBOL, JCL, DB2, and CICS.

Lead code reviews and knowledge transfer sessions.

Provide inputs to architecture decisions and modernization roadmaps.

Skills

Must have

Required Technical Skills:

Languages / Technologies:

COBOL (Batch & Online)

CICS

JCL

DB2

IMS (DB / DC)

Mainframe Concepts:

VSAM, File handling

Abend analysis

Job scheduling and batch cycles

Online transaction processing

Debugging & Support:

Batch and online troubleshooting

Root cause analysis

Production support best practices

Performance & Quality:

SQL tuning (DB2)

Program and job optimization

Non-functional defect resolution

Domain & Functional Skills:

Strong understanding of business processes and workflows

Life Insurance & Pensions domain knowledge is highly preferred:

Policy administration

Premiums, claims, annuities, and payouts

Regulatory and compliance-driven logic

Soft Skills:

Strong analytical and problem-solving skills

Ability to work with minimal documentation

Excellent communication with technical and non-technical stakeholders

Ownership mindset and accountability in production environments

Ability to work independently and lead small technical teams

Nice to have

Experience with legacy modernization initiatives

Exposure to Agile / DevOps practices in mainframe environments

Experience working with offshore/onshore teams

Knowledge of scheduling tools (e.g., CA-7, Control-M)

Other

Languages

Danish: C1 Advanced,English: C1 Advanced

Seniority

Senior

Related jobs

View all vacancies

Software Developer (COBOL 400, Host integration)

Cobol (Mainframe)

Malaysia

Kuala Lumpur

Senior COBOL Developer

Cobol (Mainframe)

United States of America

Remote United States

Senior COBOL Developer

Cobol (Mainframe)

India

Remote India

Remote Denmark, Denmark

Req. VR-122554

Cobol (Mainframe)

BCM Industry

24/04/2026

Req. VR-122554

Apply for Senior COBOL Developer in Remote Denmark

*Indicates a required field

First name

Last name

Your country

Your City

Phone

Specialization

Attach your resume (max file size 1MB; allowed extensions: doc, txt, pdf, docx) Upload resume

Number of years of experience in the specialization you are applying for

What are your monthly gross salary expectations?

Read Explanatory Notes

Under the terms of your specific consent or to perform our obligations under a contract with you, as applicable, we, Luxoft Holding Inc. will manually and electronically process your personal data, specifically your first name, last name, phone number, e-mail address and other data you provide us through this form.

Within this context, we process personal data only for the specific purpose(s) indicated in the individual consent language or other notices provided below.

We will – insofar as reasonably necessary for the purpose you have agreed to and within the scope of applicable laws – transfer your personal data to other entities within the Luxoft Group and to the group of third party recipients listed in our Privacy Notice. Such Recipients can be located outside the European Union (EU) and/or the European Economic Area (EEA) (“Third Countries”). The Third Countries concerned, e.g. the USA, may not have the level of data protection that you enjoy e.g. under the GDPR. This can result in disadvantages such as an impeded enforcement of data subjects’ rights, a lack of control over further processing and access by state authorities. You may only have limited legal remedies against this. Insofar our transfer of your personal data to recipients in Third Countries is not covered by an adequacy decision of the EU Commission, we achieve an adequate level of data protection as further detailed out in our Privacy Notice.

With your consent, we personalise marketing communications to you by way of carrying out marketing research analysis, analysing the surfing-behaviour of our website visitors and to adjust it to their detected tendencies, as well as to plan more efficient future marketing activities. This personalised marketing does not include any automated decision-making activities.

Further information on how we process personal data in general is available in our Privacy Notice. You may withdraw any given consent at any time. The withdrawal of your consent(s) will not affect the lawfulness of processing before its withdrawal. For any request in this context, please e-mail us at: DPO@luxoft.com.

Before uploading CV or any other information to this website, to learn more about your obligations and restrictions arising from the use of this website, please read our Terms of Use.

By clicking the Agree and Send button, you consent that Luxoft Holding Inc. can process your provided personal data for the purpose of processing your application to establish a potential employment, internship or relocation with Luxoft Holding Inc., a relevant affiliate of the Luxoft Group or Luxoft Group’s clients, as applicable. You consent to the retention of your personal data, with the purpose of contacting you for potential future employment opportunities. If you refer a friend, we will process your provided personal data of you and your referral to award you with a bonus for such recommendation. You can withdraw your consent at any time with effect for the future. Before you consent, please click on „Read these Explanatory Notes“ and view our Privacy Notice (e.g. for your data subject rights).

Note: Our system automatically converts each CV into our standardized format, enabling our HR teams to process applications more efficiently.

I consent that Luxoft Holding Inc. and the affiliates of the Luxoft Group can process my personal data for the purpose of sending me regular emails with information about Luxoft as an employer including job vacancies and (ii) marketing communications with information about recruitment-related events, organized webinars, conferences, as well as the Logeek Magazine and other similar publications. I can withdraw my consent at any time with effect for the future. These communications are personalised to my interests in accordance with our Privacy Notice.

Related Jobs

All jobs

MENU

Senior COBOL Developer

Project description

Responsibilities

Skills

Other

Related jobs

Software Developer (COBOL 400, Host integration)

Senior COBOL Developer

Senior COBOL Developer