Field CTO – Mainframe Modernization

The role

The Field CTO will serve as a senior technical authority to solve mainframe modernization challenges. This person will design target-state architectures, partner with engineering to evolve the platform, and build relationships with executive leadership.

What you will do

• Serve as a senior technical authority on mainframe systems, application and data architectures, transaction processing, and operational resilience.
• Lead the architectural understanding of how application logic, data models, transaction boundaries, batch workloads, and runtime behavior interact.
• Work with customers' architects to design target-state architectures.
• Guide decisions about what to translate, rearchitect, or retain.
• Partner with engineering, product, partnerships, and sales teams to improve the platform.
• Identify recurring challenges in mainframe modernization to turn into automated platform capabilities.
• Help extend Blitzy's World Model to capture relationships among business logic, application behavior, data, and runtime dependencies.
• Develop reusable validation approaches, reference architectures, and scalable service offerings.
• Build trusted relationships with CIOs, CTOs, engineering leaders, and senior mainframe specialists.
• Lead technical discovery, architecture reviews, workshops, proofs of concept, and technical validation.

Required qualifications

• Deep, hands-on knowledge of IBM Z and z/OS, including technologies such as CICS, Db2, IMS, JCL, VSAM, Parallel Sysplex, RACF, MQ, and batch scheduling.
• Demonstrated ability to reason about complex mainframe application behavior, data dependencies, transaction integrity, concurrency, recovery, and security.
• Strong understanding of modern distributed systems, cloud architectures, and enterprise modernization.
• Experience solving difficult technical problems in mission-critical enterprise systems and turning insights into practical modernization plans.
• Ability to earn the confidence of experienced systems engineers and senior technology executives alike.
• Passion for technology, customer outcomes, building better solutions, and learning about AI and autonomous software engineering.
• Willingness to work hands-on with customer, partner, engineering, and product teams.

About the company

Blitzy is a Cambridge, MA based AI software development platform that uses an agentic platform to autonomously build custom software. The company is backed by multiple tier 1 investors and aims to revolutionize the software development life cycle.