Senior Security Engineer

Security Engineering at Helsing sits at the intersection of deep technical expertise, adversarial thinking, and real-world impact. You'll work across the full breadth of our technology — from cloud infrastructure to applications, identity systems, and products — identifying and reducing the security risks that matter most.

What you'll do

• Identify, assess, and prioritise security risks across our systems, products, and infrastructure - distinguishing between theoretical concerns and material threats to the business
• Design and implement practical security controls across cloud platforms, applications, products, and data - and guide engineering teams in doing the same
• Develop and apply threat models to surface architectural risks, trust boundary issues, and failure modes before they become incidents
• Partner with engineering, product, and operational teams as a trusted security adviser - providing patterns, guidance, and guardrails rather than one-off approvals or blockers
• Contribute to the detection, investigation, and containment of security incidents, and drive systemic improvements from what we learn
• Reduce manual and reactive security work by building automation, improving tooling, and embedding secure-by-default practices into how we develop and operate systems
• Bring technical depth to assurance activities such as audits, certifications, and customer security reviews - ensuring our controls are real and effective, not just documented

What you'll need

• Deep hands-on expertise in one or two security domains - such as application security, cloud security, identity and access management, cryptography, detection and response, or platform security - and can demonstrate genuine impact within them
• Think in terms of trust boundaries, failure modes, blast radius, and adversarial behaviour rather than individual vulnerabilities in isolation
• Can translate complex security risk into language that resonates with non-security stakeholders - engineers, product managers, and senior leadership alike - and influence outcomes without relying on authority
• Approach security with a risk-based mindset, making proportionate, well-reasoned decisions under uncertainty and consistently asking whether the work you are doing reduces material risk rather than simply satisfying a compliance requirement
• Experience working across multiple teams and technical domains simultaneously, maintaining quality and judgement across contexts
• Track record of identifying gaps and driving security improvements to resolution, including in ambiguous or loosely scoped problem spaces

Nice to have

• Experience working in or alongside regulated, high-assurance, or defence-adjacent environments where security requirements are complex and the consequences of failure are significant
• Hands-on offensive security experience - red teaming, penetration testing, or adversarial simulation - that informs how you approach defensive design and threat modelling
• Familiarity with security considerations specific to AI or machine learning systems, including model integrity, data pipeline security, or adversarial ML concepts
• Background in cloud-native security engineering, particularly across AWS, GCP, or Azure, including infrastructure-as-code, container security, and cloud identity patterns

What they offer

• Work directly contributing to the protection of democratic countries while balancing ethical and geopolitical concerns
• Operate in a domain with highly unusual technical requirements where robustness, safety, and ethical considerations are vital
• Work with world-leading experts in their fields on unique engineering and AI challenges