IT Application Support Engineer (Mainframe)

Inetum; Lisboa; On-site; EUR 42,000 - 66,000; Full time

Job summary

Inetum in Lisbon seeks an experienced IT Application Support Engineer to ensure stability and performance of critical banking applications in a Mainframe ecosystem.

The role focuses on production support, monitoring, release management, and technical application support with emphasis on incident resolution and continuous improvement of operational processes.

Qualifications

• Bachelor's degree in Computer Science, IT, Engineering, or a related field.
• 6+ years of professional experience in Application/Production Support or IT Operations.
• Experience supporting applications in complex enterprise environments.
• Strong analytical and troubleshooting skills.
• Ability to translate business requirements into technical solutions.
• Experience with SDLC methodologies and lifecycle management.
• Experience creating technical docs and procedures.
• Excellent communication and ability to work with international teams.
• Fluent English (written and spoken).

Responsibilities

• Provide technical and functional support for critical business applications.
• Monitor batch processing activities and workflows.
• Ensure operation of production and non-production environments.
• Investigate and resolve incidents and production issues.
• Perform root cause analysis and preventive actions.
• Monitor application performance for optimal user experience.
• Recover files and manage data restoration when required.
• Manage opening/closing of UAT environments.
• Execute scripts and environment parameterization requests.
• Data refresh activities including database copy and masking from Production to UAT.
• Support integrations and operational processes.
• Coordinate releases across environments and deploy artifacts.
• Prepare production migrations with Planning, DBA, and Production teams.
• Maintain non-regression environments and alignment across environments.
• Develop operational docs and procedures; automate repetitive tasks.
• Support change management and enhancement requests.

Skills

Analytical skills

Troubleshooting

Strong communication

SDLC experience

Documentation

English fluency

Education

Bachelor's Degree in Computer Science or related field

Tools

IBM Mainframe (z/OS)

TSO

COBOL

CICS

JCL

DB2

SQL

OPC Scheduler

Unix Shell Scripting

Oracle SQL

FTP/SFTP/MQ/CFT

Job description

• Full-time

Company Description

Inetum is a global leader in IT services, dedicated to delivering innovative solutions to our clients. We are committed to fostering a dynamic, inclusive, and diverse work environment where creativity and collaboration thrive. Present in 19 countries, we are a team of more than 28,000 professionals worldwide.

Job Description

We are looking for an experienced IT Application Support Engineer to join our team, ensuring the stability, performance, and continuous improvement of critical applications within a banking environment.

This role is focused on production support, monitoring, maintenance, release management, and technical application support in a Mainframe ecosystem.

The ideal candidate will bring strong analytical skills, a proactive mindset, and previous experience working in complex production environments.

You will play a key role in ensuring service stability, incident resolution, application monitoring, release coordination, and continuous improvement of operational processes.

Key Responsibilities

Production Support & Monitoring

• Provide technical and functional support for critical business applications.
• Monitor batch processing activities and application workflows.
• Ensure the smooth operation of production and non-production environments.
• Investigate and resolve technical incidents and production issues.
• Perform root cause analysis and implement preventive actions.
• Monitor technical and functional application performance, ensuring optimal user experience.
• Recover files and manage data restoration activities when required.
• Manage the opening and closing of UAT environments.
• Execute scripts and environment parameterization requests.
• Perform data refresh activities, including database copy and masking from Production to UAT environments.
• Support application integrations and operational processes.

Release & Deployment Management

• Coordinate application releases across multiple environments.
• Compile, package, and deploy software releases.
• Prepare and coordinate production migrations with Planning, DBA, and Production teams.
• Maintain non-regression environments and ensure alignment across environments.
• Prepare GUI packages and deployment artifacts.
• Develop and maintain operational documentation and procedures.
• Automate repetitive tasks and improve monitoring capabilities.
• Contribute to service reliability and operational excellence initiatives.
• Support change management activities and functional enhancement requests.

Qualifications

Required Qualifications

• Bachelor's Degree in Computer Science, Information Technology, Engineering, or a related field.
• 6+ years of professional experience in Application Support, Production Support, IT Operations, or a similar role.
• Previous experience supporting applications in complex enterprise environments.
• Strong analytical and troubleshooting skills.
• Ability to understand business requirements and translate them into technical solutions.
• Experience with SDLC methodologies and software lifecycle management.
• Experience creating technical documentation, operational procedures, and process flows.
• Excellent communication skills and ability to work within international teams.
• Fluent English (written and spoken).

Mandatory Technical Skills

• IBM Mainframe (z/OS)
• TSO
• COBOL
• CICS
• JCL
• DB2
• SQL
• OPC Scheduler
• Unix Shell Scripting
• Oracle SQL
• File Transfer Technologies (FTP, SFTP, MQ, CFT)