--- title: 'Field CTO – Mainframe Modernization at Blitzy' canonical: 'https://feeny.ai/job/field-cto-mainframe-modernization-blitzy-cambridge-kxahm0xqjxgf' type: 'job' last_seen: '2026-10-29' --- # Field CTO – Mainframe Modernization at Blitzy - **Company:** Blitzy - **Location:** Cambridge, MA - **Employment:** full-time - **Work type:** onsite - **Posted:** 2026-10-16 - **Last confirmed live:** 2026-10-29 - **Apply:** https://jobs.ashbyhq.com/blitzy/075168cd-d99b-4a93-a346-a873155e9b12 ## Job description Blitzy is a Cambridge, MA based AI software development platform on a mission to revolutionize the software development life cycle by autonomously building custom software to unlock the next industrial revolution. We're transforming how enterprises build software, turning enterprise requirements into enterprise grade code with an agentic software development platform that can autonomously execute 80% of the quantum of software development work. We're backed by multiple tier 1 investors, and have proven success as founders of previous start-ups. Our Culture Who we are: Led by two pioneering co-founders we are one of the fastest growing companies in the U.S., creating our own category of enterprise autonomous software development. We automate thousands of hours of software development for our customers, which includes strong representation within the Fortune 500. How we work: - We move Blitzy Fast: Time is both our company’s and our clients’ most precious asset. We move quickly and decisively to innovate internally and deliver exceptional software externally. - Championship Mindset: We operate like a professional sports team. We win as a team by holding ourselves and each other to high standards, collaborating in-person, and remaining focused on the mission. - Passion for Invention: We’re pushing the frontier of what’s possible, requiring constant innovation and iteration. - We Work for the Customer: We focus on delivering outsized value to the customers we work with and expanding those relationships into deep, meaningful partnerships. ## About the Role Blitzy is looking for an exceptional Field CTO with deep mainframe expertise to help solve one of enterprise technology’s hardest problems: making decades of mission-critical software understandable, transformable, and ultimately capable of continuous evolution. Mainframes have earned their reputation for extraordinary reliability. Modernizing them responsibly requires much more than translating COBOL. It requires understanding and preserving the intricate relationships among business logic, data, transaction processing, concurrency, recovery, and operational behavior, while removing the architectural constraints that make change so difficult and expensive. Blitzy already reverse-engineers and transforms complex enterprise software at extraordinary scale, including mainframe applications. Our platform has demonstrated the ability to understand codebases exceeding 30 million lines in days, and modernization programs are underway at Fortune 500 financial institutions. Our ambition goes further. We want to progressively turn the hardest challenges of enterprise modernization into automated software capabilities, making each successive transformation faster, safer, and less dependent on scarce specialist expertise. We are looking for someone who combines the depth of a world-class mainframe architect with the curiosity and imagination of a builder. Someone who respects why these systems work, understands where conventional modernization approaches fall short, and wants to help invent a fundamentally better way. ## Responsibilities Mainframe Architecture and Modernization - 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 across complex mainframe estates, ensuring modernization preserves system-level correctness rather than merely functional equivalence. - Work with customers’ most experienced architects to design target-state architectures that preserve business logic, concurrency, recovery, and operational guarantees. - Guide decisions about what to translate, rearchitect, or retain, minimizing migration risk and protecting operational continuity. Platform and Offering Evolution - Partner with Blitzy’s engineering, product, partnerships, and sales teams to improve how the platform discovers, transforms, and validates complex applications. - Identify the most difficult and recurring challenges in mainframe modernization and work with engineering to turn their solutions into automated, reusable platform capabilities, progressively reducing the need for specialized human intervention. - Help extend Blitzy’s World Model to capture relationships among business logic, application behavior, data, and runtime dependencies, creating a richer foundation for automated transformation and validation. - Develop reusable validation approaches, reference architectures, and scalable service offerings; strengthen testing of functional equivalence, transactional integrity, and operational resilience. - Explore emerging AI and autonomous engineering approaches with curiosity and technical rigor, making each successive migration easier. Customer and Executive Leadership - Build trusted relationships with CIOs, CTOs, engineering leaders, and senior mainframe specialists, communicating credibly at both architectural and executive levels. - Lead technical discovery, architecture reviews, workshops, proofs of concept, and technical validation for complex modernization opportunities. - Help customers articulate pragmatic long-term visions, connecting architecture choices to business outcomes, cost, risk, and strategic flexibility. - Work closely with Partnerships, Enterprise Sales, AI Solutions Consultants, and Customer Success to support customer decisions, adoption, and expansion. Strategic Partner Engagement - Serve as a senior technical counterpart to cloud providers, global systems integrators, and specialist modernization partners. - Build relationships with partner CTOs, distinguished engineers, architects, and delivery leaders; establish confidence in Blitzy’s technical approach. - Co-design joint solutions, reference architectures, technical validation frameworks, and repeatable delivery methods partners can take to enterprise customers. - Support joint workshops and customer engagements, bringing implementation insights back into Blitzy’s product and service roadmap. Technical and Market Leadership - Help define Blitzy’s long-term technical vision for mainframe modernization, challenging conventional approaches and identifying opportunities to fundamentally change how complex enterprise systems are understood, transformed, and operated. - Contribute technical thought leadership through executive conversations, partner engagement, and selected industry forums. - Promote practical problem-solving, technical rigor, intellectual curiosity, and continuous learning. ## 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, with particular depth in several of these areas. - Demonstrated ability to reason about complex mainframe application behavior, data dependencies, transaction integrity, concurrency, recovery, and security—not simply COBOL syntax or hardware. - Strong understanding of modern distributed systems, cloud architectures, and enterprise modernization, including tradeoffs involved in translating mainframe behavior into modern environments. - 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 rather than acting solely as an external advisor. Compensation: $250,000-$350,000 + Bonus + Equity Blitzy is an equal opportunity employer committed to building a diverse and inclusive team. We believe different perspectives make us stronger. Base salary ranges are determined by country, role, level, experience, and skills. The range displayed on each job posting reflects Blitzy’s good faith determination of the minimum and maximum targets for new hire salaries across all locations. Individual pay is determined by related factors, including job skills, experience, and relevant education or training, which may impact a final offer. Your Talent Partner can share more about the specific salary range during the hiring process ## About Blitzy ## Company Overview - **One-liner**: Blitzy is an autonomous software development platform that uses thousands of specialized AI agents to reverse-engineer complex enterprise codebases and deliver over 80% of entire software projects as production-ready, tested code. - **Entity Type**: Private (Seed / Series A) - **Headquarters**: Cambridge, Massachusetts, United States (also listed as Boston, MA) - **Founded**: 2023 - **Founders**: Sid Pardeshi (Co-founder & CEO) and Brian Elliott (Co-founder & CTO) ## Core Business - **Primary industry**: Enterprise AI / Autonomous Software Development - **Target customers**: Large enterprises with complex codebases, development agencies with enterprise clients, and engineering teams managing legacy or modern code at scale. - **Mission statement**: To transform six-month software projects into six-day turnarounds by building a purpose-built system that combines inference-time compute with deep, real-time codebase understanding. ## Products & Services - **[Blitzy OS]**: The core agentic platform that orchestrates thousands of specialized AI agents across multiple foundation models to autonomously plan, build, and validate software. It reverse engineers 100M+ lines of code, constructs a dynamic knowledge graph, and executes the full SDLC from scoping to runtime validation. Output is complete PRs with compiled code, end-to-end tests, and documentation. - **Pricing Tiers – Evaluation Phase**: Reverse Engineer ($0, up to 100K lines), Proof of Concept ($50K for 2 months), Structured Pilot ($250K for 6 months). - **Pricing Tiers – Deployment**: Commercial (~$500K/yr), Enterprise (~$5M/yr), Transformation (~$50M/yr). Pricing is per-line: $0.10/line for onboarding (reverse engineering) and $0.20/line for generation. - **Security & Compliance**: SOC 2 Type II compliant, ISO 27001 certified, guaranteed no training on customer code. - **Deployment Options**: Secure enterprise deployment (cloud or dedicated), with Forward Deployed Engineers, Field CTOs, and AI Solutions Consultants for higher tiers. ## Market Standing - **Valuation/Market Cap**: Not disclosed - **Key Metric – Total Funding**: $8.8M (Seed round $4.4M in September 2024; Series A led by Northzone with 14 investors) - **Notable Investors**: Northzone (Series A lead) - **Growth Signals**: 66 employees as of mid-2026 (+440% YoY) [linkedin.com]; holds the record score on SWE-Bench Pro; over 27 patents (pending or granted) in Generative AI; revenue model already includes million-dollar enterprise contracts (Commercial, Enterprise, Transformation tiers). ## Competitive Advantages - **Autonomy at scale**: Delivers 80%+ of entire software projects without human intervention, not just code snippets, differentiating from co-pilots. - **Enterprise-grade foundation**: Built from day one for IP-sensitive organizations; SOC 2, ISO 27001, and no training on customer code. - **Multi-agent orchestration**: Fuses every major foundation model across 3,000+ specialized agents to ensure quality and consistency. - **Deep codebase understanding**: Reverse engineers 100M+ lines to build a dynamic knowledge graph that grounds every agent in the actual system architecture. - **Patents**: 27+ patents in Generative AI, covering proprietary code generation and codebase representation. ## Strategic Focus - Continue to push autonomy toward 100% of the SDLC (beyond just coding) while maintaining enterprise security and quality standards. - Scale engineering and go-to-market teams (currently hiring PhDs, senior backend engineers, SREs, Forward Deployed Engineers, Sales, and Solutions Consulting). - Expand enterprise deployments with structured pilots and transparent per-line pricing to lower adoption risk. ## Why Work Here - **Culture fit**: Fast-paced, high-autonomy environment where you work on solving fundamental problems in AI-driven software development. Emphasis on "System 2 Thinking" – deliberate, multi-step reasoning at inference. - **Engineering focus**: Actively hiring PhDs and senior developers passionate about building production-quality AI systems. Strong culture of code quality and security. - **Work model**: Hybrid workspace with offices in Cambridge, MA and India (some roles require in-office presence). - **Notable perks**: Opportunity to work with cutting-edge models, influence product direction at an early-stage company, and contribute to patented technology. Generous equity and competitive compensation implied by investor-backed growth. - **Team**: Small but rapidly growing (66 people), flat structure with direct access to founders who are former NVIDIA engineers and US Army Rangers. ## Sources 1. [blitzy.com](https://blitzy.com/) 2. [blitzy.com/our_story](https://blitzy.com/our_story) 3. [builtin.com/company/blitzy-1](https://builtin.com/company/blitzy-1) 4. 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