Head of Security

Blitzy; Cambridge (MA); On-site; USD 180,000 - 325,000; Full time

Job summary

Blitzy's Cambridge, MA-based team seeks a Senior Security Engineer operating at the level of a Security Architect to unify our security strategy as we scale. You will provide visibility into emerging risks and drive large-scale mitigations across the product security and ML ecosystems.

This is a visionary leadership role reporting to executive leadership, with a focus on anomaly detection, automated fault detection, and long-term security strategies to protect production systems in high-stakes

Qualifications

• Advanced degree or equivalent hands-on security experience.
• Experience as Security Architect, Senior Security Engineering Manager, or Technical Security Advisor at scale.
• Expertise in machine learning security, vulnerability research, self-healing systems, and cryptography.
• CISSP or equivalent certification/experience preferred.

Responsibilities

• Unify organizational security strategy by identifying current and emerging threats across software.
• Lead offensive and defensive security initiatives spanning cryptographic, cloud, and ML platforms.
• Advise executive leadership with consistent, prioritized guidance for mitigating security risks across partners.

Skills

Executive leadership

Security strategy

Product security

Education

MSc in Security Informatics

PhD in Computer Science

Equivalent hands-on experience

Job description

About Blitzy

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 production-ready 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.

Location: Cambridge, MA (Hybrid)
Compensation: $180,000 - $325,000 (bonus + equity, commensurate with experience)

The Role

Blitzy is seeking a highly experienced Senior Security Engineer who operates at the level of a Security Architect to unify our security strategy as we scale our agentic software development platform. This is a visionary technical leadership role: you will provide clear visibility into emerging risks, drive large-scale mitigations, and strengthen our future security posture through applied security R&D. Given the nature of our platform, this role carries a heavy emphasis on product security and the security of machine learning ecosystems, spanning both stochastic and non-stochastic software.

What Success Looks Like

• Blitzy's security strategy is unified across the organization, with current and emerging threats across stochastic and non-stochastic software clearly identified and prioritized.
• Executive leadership has consistent, prioritized guidance for mitigating security risks across partner organizations, informed by your technical advisory.
• Production systems benefit from mature anomaly detection, prevention, and autonomous fault detection capabilities.
• Long-term risks in machine learning and AI ecosystems are addressed through comprehensive, forward‑looking security strategies.
• Blitzy is recognized for industry‑wide security improvements, driven by novel vulnerability research and advanced security controls.

Areas of Ownership

• Unify organizational security strategy by identifying current and emerging threats across both stochastic and non-stochastic software.
• Lead offensive and defensive security initiatives spanning cryptographic, cloud, and machine learning platforms.
• Act as a key technical advisor to executive leadership, establishing consistent, prioritized guidance for mitigating security risks across partner organizations.
• Oversee production security engineering, with a specific focus on anomaly detection, prevention, and autonomous fault detection.
• Develop and implement comprehensive security strategies to address long‑term risks in machine learning and AI ecosystems.
• Foster industry‑wide improvements by conducting novel vulnerability research and developing advanced security controls and features.
• Design and architect robust digital security devices and platforms for high‑stakes environments.

Required Experience

• Advanced degree preferred (MSc in Security Informatics, PhD in Computer Science, or closely related field) or equivalent depth of hands‑on experience.
• Extensive proven experience operating as a Security Architect, Senior Security Engineering Manager, or Technical Security Advisor at scale.
• Exceptional skills in executive leadership, security strategy, and product security.
• Deep expertise in machine learning security, vulnerability research, self‑healing systems, and cryptography.
• CISSP or equivalent certification/experience strongly preferred.

What Makes You Stand Out

• A strong background in applied research, ideally with a history of committee involvement or publications related to LLM personalization, privacy‑preserving architectures, or neural networks.
• Demonstrated experience architecting security for high‑stakes, production‑grade environments at scale.
• A track record of translating deep technical research into practical, enterprise‑ready security controls.

What Makes This Role Different

As Blitzy's Security Architect, you'll shape the security strategy for an agentic platform that autonomously writes production code, placing you at the frontier of securing the agentic software development lifecycle rather than just conventional infrastructure. You'll operate with direct visibility to executive leadership, translating novel vulnerability research into company‑wide mitigation strategy rather than executing someone else’s roadmap.

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.
We believe in being 'everyday athletes'—taking care of ourselves so we can bring our best minds to work. We promote great sleep, movement, and restorative activities for optimal mental performance. It makes for a happier and more productive team.

Blitzy is an equal opportunity employer committed to building a diverse and inclusive team. We believe different perspectives make us stronger.