Senior MACSS/Mainframe Developer

Latin America, Latin America, Costa Rica

Contracted

Costa Rica Studio

Experienced

This is a 100% LATAM-based, remote hourly contractor role, with no benefits. Interested individuals must be a citizen or permanent resident of any LATAM country. *SPONSORSHIP NOT AVAILABLE*

ImagineX Studio - Costa Rica is seeking a highly skilled Senior MACSS/Mainframe Developer to support critical project, operational, and platform initiatives within our mainframe environment. This role is essential to strengthening our client's delivery capacity, reducing single‑threaded dependencies, and enabling full‑time engineering resources to focus on advancing the Giga z/OS Connect platform and associated service builds.

Key Responsibilities

Design, develop, enhance, and maintain MACSS and mainframe-based applications and services
Support ongoing project work, operational needs, and platform enhancements across the mainframe ecosystem
Collaborate closely with cross-functional teams to ensure stable, scalable, and high‑quality mainframe solutions
Troubleshoot and resolve complex technical issues within MACSS and related mainframe components
Contribute to modernization efforts, including integration with z/OS Connect and API‑driven services
Participate in code reviews, technical design discussions, and continuous improvement initiatives
Ensure adherence to enterprise standards, security requirements, and compliance frameworks
Provide subject matter expertise to internal teams and help reduce single points of failure in current workflows

Required Qualifications

Extensive hands-on experience with MACSS, COBOL, JCL, DB2, CICS, and other core mainframe technologies
Strong understanding of mainframe application architecture, batch processing, and system integrations
Proven ability to support both project-based development and day‑to‑day operational needs
Experience troubleshooting complex mainframe issues in production and non‑production environments
Ability to work effectively in a fast-paced, highly collaborative environment
Strong analytical, problem‑solving, and communication skills

Preferred Qualifications

Experience with z/OS Connect, API enablement, or mainframe-to-cloud integration patterns
Familiarity with Agile or hybrid delivery methodologies
Background supporting large-scale enterprise platforms or modernization initiatives
Knowledge of DevOps practices within mainframe environments

This is a 100% LATAM-based, remote hourly contractor role, with no benefits. Interested individuals must be a citizen or permanent resident of any LATAM country. *SPONSORSHIP NOT AVAILABLE*

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Are you a citizen or permanent resident of Mexico, or any Central American or South American country?*

Do you have strong experience and interest in working with mainframe languages like MACSS, COBOL, JCL, CICS, DB2, as well as with IBM z/OS Connect?*

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Do you have a current US or Costa Rica Visa?*

Are you willing and able to travel to the United States 2-3 times per year at most?

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Senior MACSS/Mainframe Developer

Key Responsibilities

Required Qualifications

Preferred Qualifications

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