Infrastructure Security Engineer
Information Security Engineer (Infrastructure → Security)
London | On-site | 5 days
A technology-driven hedge fund is hiring an Information Security Engineer with a strong infrastructure background (Linux/Windows + networking) who’s looking to move further into security.
This is a hands-on role sitting at the intersection of infrastructure and security, combining incident response and investigation with ongoing improvement of security systems and controls in a high-performance environment.
The Role
You’ll work across both:
- Operational security: monitoring alerts, investigating incidents, supporting internal users
- Security engineering: tuning detection systems, improving configurations, and strengthening overall security posture
You’ll gain exposure across:
- Network and endpoint monitoring
- Incident response
- Security testing and reviews
- Log analysis and threat detection
- Vendor and software risk assessment
- Identity and access management
Responsibilities:
- Investigate and triage alerts from security systems
- Respond to internal security queries and issues
- Analyse logs and identify anomalies
- Improve configurations to reduce false positives/negatives
- Support security reviews of third-party tools and services
- Work closely with infrastructure teams on system hardening
Core Requirements
- Strong understanding of Linux/Windows environments and networking fundamentals
- Experience with scripting or programming (Python, Bash, etc.)
- Familiarity with Git and documentation practices
- Detail-oriented, proactive, and keen to learn
Nice to have
- Exposure to incident response or security operations
- Experience with SIEM, EDR or similar tooling
- Interest in automation, CI/CD, or infrastructure-as-code
- Understanding of authentication systems (SSO, OAuth, LDAP) or HTTP fundamentals
Why Apply?
- Join a high-performance, engineering-led hedge fund environment
- Strong pathway from infrastructure into security engineering
- Broad, hands-on exposure across multiple areas of InfoSec
- Opportunity to improve and shape systems, not just maintain them