Senior Developer Mainframe / Assembler (z/OS, TPF)

Company Description 
Lumen Solutions Group Inc. is a technology consulting Services company based in Florida. We provide a wide array of experienced business and IT professionals supporting clients from solution design to implementation and support. We specialize in professional IT consulting services, IT Staffing, Business/IT Strategy, Business Process Blueprints, Enterprise Architecture, Enterprise Transformation. 
 
Role: Senior Developer – Mainframe / Assembler (z/OS, TPF)
Location: Remote or NEC Region
Job Type: Long Term Contract 
 
Job Summary:
Client is seeking a Senior Developer with deep experience in IBM z/OS mainframe environments, specifically working with Assembly language and C/C++.
The developer will support and enhance a critical legacy application primarily written in Assembler, while also contributing to system integrations and new service development.
This role requires strong experience working with mainframe-based transportation or enterprise systems, along with the ability to analyze complex systems and design integration solutions across multiple platforms.
               
Primary Responsibilities

• Enhance and maintain an existing mission-critical mainframe application written primarily in Assembler.
• Perform system analysis and propose technical design solutions.
• Develop and maintain components in Assembler and C/C++.
• Design and implement integrations between legacy systems and enterprise services.
• Develop and support API integrations as both a producer and consumer.
• Work with messaging systems such as IBM MQ.
• Build and maintain file-based integrations including SFTP-based data exchanges.
• Support database interactions with DB2.
• Collaborate with architecture and engineering teams to modernize and extend legacy systems.

 
Required Technical Skills
Mainframe Environment

• IBM z/OS
• Experience with TPF-based systems.

 
Programming Languages

• Assembly (Primary language)
• C
• C++

 
Integration Technologies
Experience working with enterprise integrations such as:

• DB2 databases
• REST or enterprise APIs
• IBM MQ messaging
• File-based integrations
• SFTP data transfers

 
Developmental Responsibilities

• Legacy system enhancements.
• Integration design and implementation.
• New service/component development.
• System troubleshooting and debugging.

 
Lumen Solutions Group Inc is an equal opportunity employer. All qualified applicants will be considered for employment without regard to any legally protected status.