{"id":2724798,"url":"https://alion.io/job/blitzy-field-cto-mainframe-modernization","title":"Field CTO – Mainframe Modernization","company":{"id":178299,"name":"Blitzy","domain":"blitzy.com","url":"https://alion.io/company/blitzy","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":75,"open_postings":4,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Enterprise Apps","role_family":"Enterprise Apps","seniority":"head","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Cambridge, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":250000,"max":350000,"currency":"USD","period":"year","gross":null,"usd_annual":350000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"CICS","optional":false},{"name":"COBOL","optional":false},{"name":"Db2","optional":false},{"name":"IMS","optional":false},{"name":"JCL","optional":false},{"name":"VSAM","optional":false},{"name":"World Models","optional":false}],"status":"live","first_seen_at":"2026-10-16T14:43:12Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-18T12:56:59Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"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.\nOur Culture\nWho we are:\nLed 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.\nHow we work:\nWe 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.\n\nChampionship 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.\n\nPassion for Invention: We’re pushing the frontier of what’s possible, requiring constant innovation and iteration.\n\nWe Work for the Customer: We focus on delivering outsized value to the customers we work with and expanding those relationships into deep, meaningful partnerships.\n\nAbout the Role\nBlitzy 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.\nMainframes 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.\nBlitzy 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.\nOur 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.\nWe 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.\nResponsibilities\nMainframe Architecture and Modernization\nServe as a senior technical authority on mainframe systems, application and data architectures, transaction processing, and operational resilience.\n\nLead 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.\n\nWork with customers’ most experienced architects to design target-state architectures that preserve business logic, concurrency, recovery, and operational guarantees.\n\nGuide decisions about what to translate, rearchitect, or retain, minimizing migration risk and protecting operational continuity.\n\nPlatform and Offering Evolution\nPartner with Blitzy’s engineering, product, partnerships, and sales teams to improve how the platform discovers, transforms, and validates complex applications.\n\nIdentify 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.\n\nHelp 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.\n\nDevelop reusable validation approaches, reference architectures, and scalable service offerings; strengthen testing of functional equivalence, transactional integrity, and operational resilience.\n\nExplore emerging AI and autonomous engineering approaches with curiosity and technical rigor, making each successive migration easier.\n\nCustomer and Executive Leadership\nBuild trusted relationships with CIOs, CTOs, engineering leaders, and senior mainframe specialists, communicating credibly at both architectural and executive levels.\n\nLead technical discovery, architecture reviews, workshops, proofs of concept, and technical validation for complex modernization opportunities.\n\nHelp customers articulate pragmatic long-term visions, connecting architecture choices to business outcomes, cost, risk, and strategic flexibility.\n\nWork closely with Partnerships, Enterprise Sales, AI Solutions Consultants, and Customer Success to support customer decisions, adoption, and expansion.\n\nStrategic Partner Engagement\nServe as a senior technical counterpart to cloud providers, global systems integrators, and specialist modernization partners.\n\nBuild relationships with partner CTOs, distinguished engineers, architects, and delivery leaders; establish confidence in Blitzy’s technical approach.\n\nCo-design joint solutions, reference architectures, technical validation frameworks, and repeatable delivery methods partners can take to enterprise customers.\n\nSupport joint workshops and customer engagements, bringing implementation insights back into Blitzy’s product and service roadmap.\n\nTechnical and Market Leadership\nHelp 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.\n\nContribute technical thought leadership through executive conversations, partner engagement, and selected industry forums.\n\nPromote practical problem-solving, technical rigor, intellectual curiosity, and continuous learning.\n\nQualifications\nDeep, 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.\n\nDemonstrated ability to reason about complex mainframe application behavior, data dependencies, transaction integrity, concurrency, recovery, and security-not simply COBOL syntax or hardware.\n\nStrong understanding of modern distributed systems, cloud architectures, and enterprise modernization, including tradeoffs involved in translating mainframe behavior into modern environments.\n\nExperience solving difficult technical problems in mission-critical enterprise systems and turning insights into practical modernization plans.\n\nAbility to earn the confidence of experienced systems engineers and senior technology executives alike.\n\nPassion for technology, customer outcomes, building better solutions, and learning about AI and autonomous software engineering.\n\nWillingness to work hands-on with customer, partner, engineering, and product teams rather than acting solely as an external advisor.\n\n Compensation: $250,000-$350,000 + Bonus + Equity\nBlitzy 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. 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