Security Engineer

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Security Engineer – Detection and Response We are expanding our security engineering team and looking for someone who enjoys solving practical security problems, learning new tools, and working across a modern Microsoft environment. You will help strengthen our detection and response processes, improve cloud security in Azure, and support engineering teams in building safely and responsibly. This is a hands‑on role that covers a mix of operational work and engineering improvements. You don’t need to know everything already – you will have opportunities to learn, try new approaches, and gain experience across different areas of security. What you’ll work on
Help improve and maintain our Azure‑based security tooling, including Microsoft Sentinel, Defender XDR, and Defender for Cloud Contribute to the optimisation, tuning, and maintenance of SOC tools Investigate suspicious activity and support incident response when needed Contribute to cloud hardening in areas such as identity, access, networking, storage, WAF, and logging Participate in security risk assessments, threat modelling, and vulnerability management Support penetration testing by organising test execution, reviewing results, and helping teams prioritise fixes
What we’re looking for
About 3–5 years in a security engineering or internal security team role Practical understanding of cybersecurity fundamentals and common risks Experience with infrastructure‑as‑code (Bicep, Terraform, or similar) Familiarity with PowerShell for automation or general scripting tasks Good problem‑solving skills and attention to detail Ability to work in a fast‑moving environment with competing priorities Some knowledge of frameworks such as SOC 2, ISO 27001, GDPR, or NIST CSF A growth mindset and curiosity to keep learning
How we reward you
Competitive bonus scheme – designed to reward and recognise high performance Flexible benefits budget – a pot to fund meaningful benefits for you such as hormone or fertility testing, cancer screening, neuro‑diversity coaching, or anything that matters to you A range of salary‑sacrifice options to help you make tax‑efficient savings on electric cars, nursery schemes, home and tech goods Around‑the‑world scheme – 3 months work‑from‑anywhere scheme Mental wellbeing support – access therapy and mental health sessions through Spill Learning and development – £1,000 personal development budget to help you grow in your role Private health care – enjoy all the benefits AXA has to offer, including reduced gym memberships and medical history disregarded Medical cash plan – to help you with the costs of dental and optical expenses Life insurance and income protection – four times your annual salary for peace of mind Matched pension contributions up to 5% 25 days holiday – plus bank holidays, well‑being days, and volunteering days Enhanced parental leave – enhanced maternity, paternity, and adoption pay
All are welcome. At Flagstone, we’re assembling a diverse team that defies our industry’s norms. Think this role could suit you? We encourage you to apply, no matter your background. Seniority level
Not Applicable
Employment type
Full‑time
Job function
Information Technology
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Location:
City Of London
Job Type:
FullTime

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