Senior Host Developer

EPAM Systems; Peru (IL); On-site; USD 110,000 - 160,000; Full time

Job summary

EPAM Systems is seeking a Senior Host Developer to contribute to core banking mainframe solutions on IBM z/OS. You will participate in building, maintaining, and optimizing critical banking applications, ensuring high availability and reliability.

The role requires hands-on COBOL, JCL, CICS, and DB2 expertise, plus growing experience in Gen AI and AI-assisted development to accelerate delivery. Strong English and Spanish skills support multilingual collaboration.

Qualifications

• At least 3 years of professional software development experience.
• Hands-on COBOL on IBM z/OS development experience.
• Experience with JCL batch processing.
• Proficiency with CICS transactional development.
• Strong DB2 and SQL knowledge.
• Experience in AI Solution Engineering for enterprise systems.
• Background in Gen AI Application Development.
• Gen AI Assisted Development experience.
• Prompt Engineering skills.
• Strong English and Spanish at a B2 level or above.
• Nice to have COBOL deep expertise for legacy systems.
• Broader background with CICS for transactional apps.
• Advanced JCL skills for batch orchestration.
• Extensive knowledge of DB2 optimization.

Responsibilities

• Participate in core banking applications development underpinning essential business functions.
• Perform maintenance on mission-critical applications with high availability requirements.
• Diagnose and resolve production incidents to minimize banking disruptions.
• Support testing to ensure stability before release.

Skills

COBOL on IBM z/OS

JCL

CICS

DB2 / SQL

Gen AI Application Development

Gen AI Assisted Development

Prompt Engineering

Batch processing

AI Solution Engineering

English/Spanish B2+

Job description

We are looking for a skilled Senior Host Developer to join our team. In this position, you will play a key part in shaping and enhancing essential mainframe solutions that power core banking operations. Working closely with cross-functional teams, you will help deliver dependable, high-performing applications that align with business goals.

Responsibilities

• Participate in the creation and advancement of core banking applications that underpin essential business functions
• Perform corrective, adaptive, and evolutionary maintenance on mission-critical applications with strict high-availability requirements
• Diagnose and resolve production incidents to limit disruption to banking operations
• Support functional, integration, and certification testing to secure application stability before release

Requirements

• At least 3 years of relevant professional experience in software development or a comparable field
• Hands-on background in application development with COBOL on IBM z/OS
• Working expertise in batch process programming using JCL
• Proficiency in transactional application development with CICS
• Solid mastery of IBM Db2 and SQL databases for managing data and running queries
• Practical experience in AI Solution Engineering to design and deliver AI-powered capabilities within enterprise systems
• Background in Gen AI Application Development for creating solutions built on generative AI models
• Real-world experience with Gen AI Assisted Development to speed up coding, testing, and delivery activities
• Skill in Prompt Engineering for crafting effective, reliable, and finely tuned prompts for AI models
• Strong written and spoken command of English and Spanish at a B2 level or above
• Nice to have: Deeper expertise with COBOL for supporting and improving legacy business-critical systems
• Broader background with CICS for building and sustaining transactional applications
• Advanced JCL skills for automating and orchestrating batch processing workflows
• Extensive knowledge of DB2 for optimizing database performance and managing large data volumes