Senior Security Engineer London

Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business – where smart people do their best work.

Each definition shares a common thread: our unique culture. It’s our pride and joy. And our competitive advantage.

A feel for our culture:

To revolutionise the savings market, we need to be at our best. But high performance takes more than talent – it takes a culture of kindness, respect, and growth.

That’s why we’re building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it.

We may not change the world, but wecan change the world of financial technology. And all it takes is a winning mix of drive, talent, and empathy. Our culture celebrates all three.

But enough about us. Let’s talk about you.

What you’ll do:

We are looking for a Senior Security Engineer who’s excited to forge a new way to save and join our recently formed security focused team at Flagstone. We are a Microsoft house (from endpoints, email and all the way to our platform that our customers use every day), looking for someone to work alongside the Cloud Platform Engineering Team who is comfortable with the full suite of Microsoft Security and Infrastructure solutions, to help us improve and deliver on the promise of providing confidentiality, integrity, and availability to our clients who trust us with their transactions, data, and availability.

You will help to grow the dedicated security function at Flagstone and assist with the management of a secure modern Microsoft Azure hosted services as well as help us to build out our automation and controls in the same way we build and provide our services to our customers.

Your responsibilities will include:

• Take ownership & define security tooling and configuration as IaC (Infrastructure as code).
• Monitoring, investigating, and responding to security threats using Microsoft Sentinel.
• Designing and managing scalable security solutions in Microsoft Azure.
• Building automation playbooks to improve efficiency in the Security team.
• Defining, building, and maintaining security dashboards used within multiple levels of the organisation.
• Enhancing and maintaining our Microsoft Security solutions through integrations.
• Leading security assessments to identify risks and enhance our security posture.
• Working closely with development and operations teams to embed security across the SDLC.
• Develop and maintain internal security procedures and controls.
• Acting as an ambassador for Cybersecurity, promoting both good practices and the Cyber Security teams tools and services.
• Participating in our incident response team, including out-of-hours support where required.

What you’ll need:

• Deep understanding of cloud security principles and best practices, particularly within Azure.
• Good understanding of cyber security principles and best practices.
• Hands-on experience with infrastructure-as-code (Bicep or Terraform).
• Good understanding of software development practices and coding.
• Knowledge and practical use of Powershell.
• Strong problem-solving skills with logical thinking and attention to detail.
• The ability to work under pressure and within a fast-paced environment.
• Ability to manage competing deadlines and prioritise responsibilities to effectively meet business needs.
• Familiarity with compliance frameworks such as SOC 2, ISO 27001, GDPR or NIST CSF.

How we reward you:

At Flagstone, the benefits extend beyond false gifts like “fruit and snacks”. Instead, we invest in your health, wealth, and professional development. Here’s a selection of our benefits:

• Hybrid working – Spend at least 1 day a week with your team in our collaborative London office
• Competitive bonus scheme – designed to reward and recognise high performance
• Flexible benefits budget – a pot to fund meaningful benefits for you, whether it\’s hormone or fertility testing, cancer screening, neuro-diversity coaching or something that matters for 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.

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