Custody API & Mainframe Modernization Architect

Beta Search; Chicago (IL); On-site; USD 140,000 - 190,000; Full time

Job summary

Beta Search is seeking a Custody API & Mainframe Modernization Specialist to expose legacy custody functionality through secure, scalable services as part of a multi-year modernization program.

The role focuses on integrating IBM mainframe applications with modern cloud architectures, designing enterprise APIs, and guiding modernization planning while mentoring teams on best practices.

Qualifications

• 10+ years of financial services technology experience.
• Strong experience supporting IBM Mainframe environments.
• Experience with COBOL, CICS, JCL, DB2, VSAM, and batch processing.
• Experience designing enterprise APIs.
• Experience integrating legacy platforms with distributed applications.
• Strong understanding of custody or securities processing platforms.
• Excellent communication and consulting skills.

Responsibilities

• Design API strategies that expose legacy custody accounting functionality.
• Develop integration approaches between IBM mainframe applications and modern cloud architectures.
• Analyze COBOL, CICS, DB2, VSAM, and batch workflows to identify modernization opportunities.
• Partner with architecture, infrastructure, and business teams to define service-based integration patterns.
• Support incremental modernization while minimizing operational risk.
• Design secure RESTful APIs and event-driven services.
• Participate in application decomposition and modernization planning.
• Produce technical documentation and integration standards.
• Support production implementations and issue resolution.
• Mentor development teams on legacy modernization best practices.

Skills

Mainframe Expertise

COBOL

CICS

JCL

DB2

VSAM

API Design

Distributed Systems

Custody/Securities

Communication

Tools

IBM MQ

Kafka

Finbourne

Azure

AWS

Microservices

DevSecOps

Job description

Beta Search is seeking a Custody API & Mainframe Modernization Specialist to expose legacy custody functionality through secure, scalable services as part of a multi-year modernization program.

The role focuses on integrating IBM mainframe applications with modern cloud architectures, designing enterprise APIs, and guiding modernization planning while mentoring teams on best practices.