CTO | Founding Team | Path to Co-Founder

Israel | Pre-Seed, Pre-Funding | Digital Trust & Fraud Prevention

Note: Kinettica is leading this search on behalf of a stealth, early-stage Fraud Prevention venture (this role is with the Cycall, not Kinettica).

AI is making digital, voice and human impersonation more convincing than ever. Nearly everyone has received, or will receive, a message, call or digital interaction that appears completely legitimate, while leaving one fundamental question unanswered:

How do I know who I’m really communicating with?

CyCall is being built to solve exactly that problem.

We are creating a Digital Trust & Verification layer that enables people to verify the identity of the organization and the representative acting on its behalf throughout the entire interaction: from the initial contact, through the conversation and engagement, all the way to the action or transaction itself.

Our goal is not only to detect fraud after it happens, but to create a verified and trusted communication flow by design, a new trust layer between organizations and their customers.

CyCall is currently at the pre-seed, pre-funding stage, with an initial product, an existing development team, and an experienced founding group spanning cybersecurity, technology and business.

We’re looking for a hands-on CTO to become the technical and security owner of CyCall and shape the foundations of the company from the ground up.

This is a deeply technical builder role, but not a behind-the-scenes architecture position.

You will define the system and security architecture, make the critical technical decisions, work directly with the existing development team, and personally engage in the complex parts of the product where your judgment matters most.

At the same time, you will be a key customer-facing technical leader, someone who can walk into a room with senior fraud, security and technology teams, understand their concerns, challenge assumptions, explain the architecture clearly, and build confidence in both the solution and the technical direction.

This role is about owning both the technical substance and the technical conversation around it.

• Own the end-to-end system and security architecture of the product.
• Design the core authentication, verification and cryptographic mechanisms, including identity, attestation and key-management approaches.
• Lead threat modeling and adversarial thinking, designing the system with sophisticated attackers in mind.
• Make the critical architectural and implementation decisions required to move from an early product to a production-grade platform.
• Lead the existing development team while remaining hands-on in the most critical technical areas.
• Act as the technical authority in discussions with customers, design partners and external technical stakeholders.
• Work directly with fraud, security and technology teams at prospective customers to understand their environment, articulate the solution and address technical objections.
• Translate customer and design-partner feedback into architectural and product decisions.
• Build Security, Privacy and Enterprise Readiness into the product from day one.
• Make the technical decisions around Mobile, Messaging and Telecom constraints that shape what can be built.
• Own the technical roadmap and help shape the company’s technical narrative with customers, partners and investors.

• Deep, practical experience in Applied Security / Cybersecurity.
• Strong understanding of areas such as Cryptography, Authentication Systems, Secure Protocol Design and Threat Modeling.
• Proven experience architecting and building secure Backend or Distributed Systems.
• A true builder mindset, someone who is still comfortable going deep, writing code and implementing critical parts of the system when needed.
• Strong architectural judgment and the ability to make consequential technical decisions without an established playbook.
• Ability to lead a small, high-quality development team with speed, clarity and minimal bureaucracy.
• High comfort with early-stage ambiguity, rapid iteration and significant ownership.

We are specifically looking for someone who can combine deep technical credibility with strong external presence.

You should be comfortable:

• Engaging directly with senior Fraud, Security and Technology teams.
• Explaining complex security architecture in a clear and compelling way.
• Defending technical decisions under scrutiny.
• Asking the right questions in customer conversations and turning them into better product and architecture decisions.
• Building technical trust with sophisticated enterprise stakeholders.

This is not a “technical sales” role, but the ability to represent and defend the technology externally is a core part of being successful in the position.

Highly relevant experience in:

• Fraud Prevention
• Anti-Abuse
• Identity Fraud
• Impersonation
• Transaction Risk
• Trust Infrastructure

Experience building or architecting systems designed to identify, prevent or mitigate fraud is a major advantage.

Experience in:

• Telecom infrastructure
• Messaging platforms
• SIP
• SMS
• CPaaS
• Carrier Signaling
• STIR/SHAKEN

Experience in one or more of the following:

• Mobile Security and iOS / Android platform constraints.
• Identity and Authentication infrastructure.
• Products built for regulated or security-sensitive enterprise environments.
• Banks, financial institutions or organizations with demanding security requirements.
• Security Reviews, Privacy, GDPR, SOC 2 or related compliance frameworks.

This is an opportunity to define the technical and security foundations of a company at the stage when they are still truly open to shape.

You won’t be inheriting a mature architecture or optimizing an existing system. You’ll be helping build the core, making foundational decisions and directly influencing the product, architecture and technical direction of the company.

You’ll be working on a large and rapidly growing problem that is becoming more urgent in the AI era, alongside an experienced founding team with strong access to the market.

For the right person, this is a company-defining CTO role with meaningful ownership and a clear path to Co-Founder status, based on shared milestones, contribution and long-term mutual fit.

Contact: Keren Halperin | Kinettica | 053-7307625 | [email protected]