Senior Mainframe Developer — Financial Services Modernization

Halian | Managed Services, Recruitment Agency & Contract Staffing; Brussel; On-site; EUR 90,000 - 130,000; Full time

Job summary

Halian Group in Brussels is seeking an experienced Mainframe Developer to join its IT team. You will translate business requirements into technical designs and develop, maintain, and modernize mainframe applications in a collaborative, multi-stakeholder environment.

You will work closely with IT and business partners, participate in on-call rotations, and contribute to continuous improvement and modernization while ensuring stability of critical services.

Qualifications

• Strong hands-on experience in mainframe development and maintenance.
• Understanding of mainframe programming, databases, development workbenches, source control, and CI/CD practices.
• Ability to translate complex business needs into functional/technical solutions.
• Excellent written and verbal communication; ability to explain ideas clearly.

Responsibilities

• Translate business requirements into functional and technical designs.
• Develop, maintain, and enhance mainframe applications.
• Work independently to understand existing applications and processes.
• Participate in on-call support rotation for critical services.
• Collaborate with IT and business stakeholders across teams.
• Contribute to modernization and continuous improvement while maintaining existing solutions.

Skills

Mainframe development

CI/CD

Communication skills

Dutch and English

Tools

Source control

Development workbenches

CI/CD tools

Job description

Halian Group in Brussels is seeking an experienced Mainframe Developer to join its IT team. You will translate business requirements into technical designs and develop, maintain, and modernize mainframe applications in a collaborative, multi-stakeholder environment.

You will work closely with IT and business partners, participate in on-call rotations, and contribute to continuous improvement and modernization while ensuring stability of critical services.