Senior Security Engineer, Red Team
Nscale is a London-based, full-stack AI cloud and infrastructure company that provides GPU compute, managed AI services, orchestration software, data centers, and power infrastructure for AI training, fine-tuning, and inference.
Funding history
About Nscale
Nscale builds and operates vertically integrated AI infrastructure spanning software, GPU compute, networking, storage, purpose-built data centers, and power. Its active cloud platform offers self-service inference endpoints, fine-tuning, managed Kubernetes and Slurm, virtual machines, and GPU clusters.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will deliver offensive security campaigns across cloud, infrastructure, enterprise environments, identity systems, endpoints and applications. You'll use AI models and agentic tools to speed up reconnaissance, vulnerability discovery, exploit development, attack-path analysis and reporting. You'll own your workstreams across several parallel campaigns and partner with Detection & Response and Security Engineering to turn findings into measurable improvements.
Requirements
- 5+ years of experience in red teaming, offensive security or penetration testing
- Proven experience conducting adversary simulations and complex attack chains
- Hands-on experience applying large language models to offensive security, including cyber-gated models
- Experience building agentic workflows orchestrating multiple models and tools
- Strong expertise across network, application, cloud and identity security
- Deep understanding of MITRE ATT&CK and offensive tools and frameworks
- Ability to own and deliver workstreams across several campaigns with limited supervision
Responsibilities
- Plan and execute red team campaigns and adversary simulations
- Own scope, timelines, evidence and reporting across multiple campaigns
- Emulate real-world attacker behaviour including initial access, lateral movement, privilege escalation and persistence
- Build agentic workflows that orchestrate multiple models and tools
- Evaluate new models and tooling and integrate those that improve throughput
- Build guardrails, logging and human review steps for model-driven activity
- Perform penetration testing across applications, APIs, identity systems and internal services
- Develop and maintain offensive tools, scripts and supporting infrastructure
- Identify gaps in preventive controls, detection coverage and response capabilities
- Partner with Detection & Response on detection validation and purple team exercises
- Collaborate with Security Engineering to remediate vulnerabilities
- Document risk, impact and remediation clearly
- Peer-review findings and reports and contribute recommendations to the team roadmap
Benefits
- Equity
- Bonus
- Medical, dental and vision insurance
- Flexible paid time off
- Parental leave
- Retirement plan participation
- Flexible workplace