Founding CTO (+ Equity) at VC-backed AI security startup

Added 24/08/2026

An innovative, VC-backed startup at the forefront of AI security is seeking a visionary Founding CTO to join as a core member of the leadership team. This is a unique opportunity to take charge of the technology strategy and execution within a fast-paced, high-growth environment. As the Founding CTO, you will work closely with the founding team to define the technical roadmap, architect scalable solutions, and build a world-class engineering team. You will have significant influence over product direction and play a pivotal role in shaping the company’s culture and long-term success. Key responsibilities include designing and implementing secure, scalable...

Senior IT Support & Endpoint Security Engineer at Cloudnc

Added 03/09/2026

We are seeking a Senior IT Support & Endpoint Security Engineer to provide expert technical support and help maintain a secure, reliable, and efficient workplace technology environment. This role will combine hands-on troubleshooting with endpoint administration, security operations, and continuous improvement. You will act as an escalation point for complex technical issues, supporting users across a range of devices, operating systems, applications, and cloud-based services. Key responsibilities will include managing and securing laptops, desktops, mobile devices, and other endpoints throughout their lifecycle; administering endpoint management, identity, access, and security platforms; and monitoring device compliance, vulnerabilities, and security alerts. You will...

Founding AI Security Engineer / Researcher at Refractal

Added 01/09/2026

We are seeking a Founding AI Security Engineer / Researcher to define and build the security foundations for advanced artificial intelligence systems. This is an early, high-impact role for someone who is comfortable working across research, engineering, and product development. You will investigate emerging threats affecting machine learning models, AI agents, data pipelines, and deployment infrastructure, translating your findings into practical safeguards and scalable security capabilities. Your responsibilities will include designing threat models for AI systems; identifying vulnerabilities such as prompt injection, data poisoning, model extraction, insecure tool use, and adversarial manipulation; and developing methods to evaluate model and application...

Head of InfoSec at AIOS — Remote, $150-250k/yr inc equity

Added 18/08/2026

We are seeking a highly skilled and experienced Head of Information Security to lead our cybersecurity initiatives in a fully remote capacity. In this pivotal role, you will be responsible for developing and implementing a comprehensive information security strategy to protect our assets, data, and technology infrastructure. You will oversee the design and execution of security protocols, ensuring compliance with industry standards and regulations while fostering a culture of security awareness across the organization. Your responsibilities will include leading a team of security professionals, conducting risk assessments, and managing incident response efforts to address any security breaches effectively. You will...

Senior Engineer, Software Security

Added 17/09/2026

We are seeking a Senior Engineer, Software Security to help strengthen the security, resilience and trustworthiness of modern software systems. In this role, you will work closely with software engineering, infrastructure, product and compliance teams to embed security throughout the development lifecycle. You will provide technical leadership on secure design, threat modelling, vulnerability management and security automation, while helping teams deliver reliable products without compromising usability or performance. Your responsibilities will include reviewing architecture and source code, identifying security risks, and recommending practical remediation strategies. You will develop and maintain security standards, libraries, tooling and development patterns that support secure-by-default...

Senior Software Engineer, Security Rules

Added 08/09/2026

We are seeking a Senior Software Engineer, Security Rules to design, build, and evolve the systems that detect and prevent security threats at scale. In this role, you will develop high-quality software and rule-based detection capabilities that help identify suspicious activity, reduce risk, and protect users and services. You will work closely with security analysts, threat intelligence specialists, product managers, and engineering teams to translate emerging threats and operational requirements into reliable, maintainable solutions. Your responsibilities will include designing, implementing, testing, and operating security rules, detection logic, and supporting services across complex production environments. You will investigate detection gaps, analyse...

Senior Software and Security Engineer

Added 03/09/2026

We are seeking a Senior Software and Security Engineer to design, develop, and protect reliable software systems across the organisation. In this senior role, you will contribute to the full software development lifecycle, from technical planning and architecture through implementation, testing, deployment, and ongoing improvement. You will work closely with engineering, infrastructure, product, and operational teams to deliver secure, scalable, and maintainable solutions that meet business and user needs. Your responsibilities will include developing high-quality code, reviewing technical designs and pull requests, improving application performance, and supporting modern development practices such as continuous integration and automated delivery. You will identify...

Senior Software Security Engineer

Added 18/08/2026

We are seeking a highly skilled Senior Software Security Engineer to join our dynamic team. In this role, you will be responsible for designing, implementing, and maintaining security protocols for our software applications. You will collaborate with cross-functional teams to identify security vulnerabilities and implement effective remediation strategies. Your expertise will guide the development of secure coding practices and help establish a culture of security awareness throughout the organization. The ideal candidate will have a deep understanding of application security principles, threat modeling, and secure software development lifecycles. You will conduct security assessments, code reviews, and penetration testing to ensure...

Senior Software Engineer in Test (Security)

Added 22/07/2026

We are seeking a highly skilled Senior Software Engineer in Test with a strong focus on security to join our dynamic team. In this role, you will be responsible for designing and implementing robust testing frameworks to ensure the security and performance of our software applications. You will develop automated test scripts and execute comprehensive test plans, identifying vulnerabilities and ensuring compliance with industry standards. Collaboration with cross-functional teams will be crucial, as you will work closely with developers, product managers, and security experts to integrate security testing into the software development lifecycle. The ideal candidate will possess extensive experience...

Senior Cyber Software Engineer/ Technical Lead

Added 09/09/2026

We are seeking a Senior Cyber Software Engineer/Technical Lead to design, develop and deliver secure software capabilities for complex cyber and national security environments. You will provide technical leadership across the full software development lifecycle, from requirements analysis and architecture through implementation, integration, testing, deployment and ongoing support. Working closely with multidisciplinary engineering, security and operational teams, you will translate mission needs into robust, scalable and maintainable solutions. Your responsibilities will include leading software design activities, establishing engineering standards and reviewing technical approaches; developing high-quality applications, services, tools and automation; and guiding the resolution of complex technical issues. You will...

Senior Cyber Software Engineer/ Technical Lead

Added 07/09/2026

We are seeking a Senior Cyber Software Engineer / Technical Lead to design, develop and guide the delivery of secure, resilient software solutions for complex cyber and national security challenges. You will provide technical leadership across the full software development lifecycle, from requirements analysis and architecture through implementation, testing, deployment and ongoing improvement. The role will involve working closely with software engineers, cyber specialists, systems engineers and stakeholders to translate operational needs into practical, high-quality technical outcomes. Key responsibilities will include defining software and system architectures; leading the development of secure, scalable applications and services; conducting technical reviews and promoting...

Senior Software Cybersecurity Engineer

Added 03/09/2026

We are seeking a Senior Software Cybersecurity Engineer to lead the design, development, and implementation of secure software solutions across complex products and platforms. In this role, you will work closely with software engineers, architects, product managers, and security specialists to embed security throughout the software development lifecycle. You will help define security requirements, assess technical risks, and ensure that applications, services, and supporting infrastructure are resilient against evolving cyber threats. Your responsibilities will include conducting threat modelling, secure design reviews, code and architecture assessments, and vulnerability analysis. You will develop and maintain security controls, contribute to secure coding standards,...

Senior Software Engineer, Customer Data Protection

Added 03/09/2026

We are seeking a Senior Software Engineer, Customer Data Protection to help design and build secure, reliable systems that safeguard sensitive customer information. In this role, you will contribute to the development of privacy-focused platforms, services, and engineering practices across the software lifecycle. You will work closely with engineers, product managers, security specialists, privacy professionals, and other stakeholders to understand requirements, assess risks, and deliver solutions that protect data by design. Your responsibilities will include designing, implementing, testing, and maintaining scalable services that support data protection, access control, retention, deletion, consent, and compliance requirements. You will provide technical leadership on...

Senior Software Engineer – Cyber (Java, Spring, AWS)

Added 26/08/2026

We are seeking a Senior Software Engineer – Cyber (Java, Spring, AWS) to design, develop and maintain secure, resilient software that supports critical cyber and technology capabilities. You will work across the full software development lifecycle, collaborating with engineers, architects, product specialists and security professionals to deliver high-quality solutions in a fast-paced and technically challenging environment. This role offers the opportunity to contribute to systems that protect information, improve operational resilience and support evolving cyber security needs. Your responsibilities will include developing scalable Java applications using Spring and related frameworks; designing and integrating RESTful APIs and distributed services; deploying and...