Founding Mainframe Expert

At Hypercubic, we're building AI systems that can understand, reason about, and rearchitect large-scale legacy applications. We work at the intersection of program analysis, knowledge extraction, and agentic systems, applied to some of the most critical enterprise software in the world.

Learn why we're excited about mainframe modernization.

About the Role

We're looking for a founding mainframe subject matter expert with hard-earned domain authority. You have spent years working directly inside production mainframe environments, understand the broader mainframe tooling and vendor landscape, and have been personally involved in real modernization efforts from technical discovery through execution.

You will work closely with the CEO and CTO to shape Hypercubic's product, technical direction, and go-to-market strategy. You will be involved end to end: from reading and reasoning about legacy systems, to working with engineers on product design, to leading enterprise customer conversations through signed annual contracts.

Core Responsibilities

• Be the Authority: Act as a hands-on technical authority on mainframe systems, including COBOL, JCL, RPG, and the surrounding legacy ecosystem.

• Technical Competence: Read, reason about, and critique real production codebases and system architectures.

• Direct Product Roadmap: Pressure-test Hypercubic's product against real-world constraints such as batch processing, data dependencies, operational risk, testing complexity, and regulatory requirements.

• Bridge to Engineering: Work directly with engineering to validate workflows, abstractions, and outputs at a technical level. Translate deep system behavior into product requirements.

• Lead Discovery: Lead technically rigorous discovery conversations with enterprise prospects.

• Structure the Deal: Support enterprise sales cycles with real technical credibility, from first call to signed annual contract. Help define pilots and PoCs with concrete technical scope and measurable outcomes.

• Partner Strategy: Engage with system integrators and partners on technically realistic deployment and integration paths.

You are a Fit if…

• You care deeply about your work and the product.

• You think in systems and feedback loops, not just features.

• You can move fast and slow. Drafting a high-level pilot strategy in an afternoon, then dissecting a 30-year-old dependency graph with engineers.

• You want to help build world-class AI for mainframe modernization.

• You have a bias for action and a track record of working in fast-paced environments with urgency.

• You can adapt your deep mainframe knowledge to modern engineering and AI paradigms.

Preferred Qualifications

• Have 10+ years working directly with production mainframe systems.

• Hands-on experience reading, debugging, and modifying large COBOL codebases.

• Strong working knowledge of JCL and batch processing in real enterprise environments.

• Experience with online transaction systems (e.g. CICS, IMS) and associated data stores (e.g. DB2).

• Direct involvement in at least one real modernization, migration, or large-scale refactoring effort.

• Ability to reason about system behavior across code, data, and operations.

• Experience leading technical discussions with enterprise customers.

• Experience scoping work, defining pilots, and navigating long enterprise sales cycles.

• Comfort owning outcomes, including technical risk and commercial commitments.

Logistics

• Location: Flexible hybrid work arrangement

• Benefits: Hypercubic offers generous health, dental, and vision benefits, PTO, and relocation support as needed.

• Sponsorship: Unfortunately, we are unable to sponsor new H1B employment visas at this time. However, we can support H1B transfers.