Senior Application Security Manager in London

About Pleo Messy spend management is tricky business.

And tedious processes are a lose-lose situation for all involved, not just finance.

At the company, we're changing that.

We build spend solutions that make managing money seamless, empowering, and surprisingly effective for finance teams and employees alike - with a vision to help all businesses ‘go beyond’.

The word ‘the company’ actually means ‘more than you’d expect’, and living by that mantra has been the secret to our success over the last 10 years.

Now, we’re at a pivotal moment in our journey; every move we make has a direct impact on our 40,000+ customers, our business, and our collective success.

We need people who take pride in uncovering customer needs, who turn complex problems into simple solutions, challenge the way things are done (respectfully), and always aim high.

With great ambitions driving us forward, we can’t say we’ve got this whole thing figured out.

And frankly, that’s half the fun!

What we can say is that we’re a driven, progressive, and, importantly, a kind bunch of 850+ people from over 100 nationalities, all committed to delivering the future of business spending, together.

About the role

We're looking for a Senior Application Security Manager to join our Cybersecurity team at the company.

In this role, you'll own vulnerability management and set the long-term application security strategy, turning a growing stream of signal into a risk-ranked plan the engineering organisation can actually act on.

If you're a player-coach who wants high leverage with low bureaucracy, and you'd rather mature a program than maintain one, then this is the opportunity for you!

Who you'll be working with and reporting to

You’ll report to our VP of Fraud & Security and lead a small App Sec team with dotted lines to other security members.

Your primary customers are the company's engineering squads, and your closest partners are Dev Sec Ops, who feed you signal and automation, alongside Sec Ops, Risk & Compliance, Privacy, and Legal.

Our team is highly collaborative and dedicated to keeping the company and its customers safe.

You'll also have the chance to shape how the wider organisation thinks about security, well beyond your own team.

What you'll be doing

As a Senior Application Security Manager, you will

• Own vulnerability management end to end, covering reporting, triage, mitigation, and the long-term strategy for application security as a department.
• Build a structured, risk-ranked approach to remediation, so the organisation knows what to fix first and why.
• Establish clear, company-wide reporting on our vulnerability posture, giving leadership the data-driven visibility they need.
• Set and deliver an App Sec roadmap, bringing delivery expectations and accountability to a team that hasn't had them.
• Partner with engineering squads as customers rather than gatekeeping them, embedding proactive security processes into how they already work.
• Multiply your team's impact through automation and AI, so coverage scales faster than headcount.
• Grow and mentor engineers, coaching them toward staff-level capability and building their confidence along the way.
• Support the company's compliance obligations across ISO27001, PCI-DSS, GDPR, and the regulatory expectations of each market we operate in, from a security vulnerability perspective.
• Reduce our attack surface through technical controls, policy, and AI enablement, addressing both external threats and internal risk.
• Contribute to the broader Cybersecurity team, staying connected with ongoing initiatives and helping shape our 2027 KPIs.

What you bring

You thrive in this role if you have

• 10+ years of experience steering application security and wider information security strategy in a compliance-heavy environment.
• A background as a senior security engineer who moved into management, with enough technical depth that you're still credible and still hands‑on.
• A track record of mentoring and growing engineers, and of keeping a team accountable without micromanaging it.
• Demonstrated experience turning signal into prioritised action through risk-based triage.
• Experience using AI and automation to scale security coverage, rather than solving everything through headcount or process.
• The ability to shape culture outside your own team, influencing engineering squads without formal authority over them.
• Comfort in a fast-moving, complex, ever‑evolving environment, where you're self‑directed and proactive.
• Exposure to fintech compliance requirements is a strong advantage. Backgrounds we also look at include Dev Sec Ops and platform security leads with real App Sec depth.
• Why is this role a good fit for you
• You want a fast, visible impact on a program with real room to improve, without having to fight for basic tooling and process first.
• You treat developers as customers and get satisfaction from security becoming an enabler rather than a blocker.
• You like being a player‑coach, staying close to the technical work while growing the people around you.
• You're motivated by high leverage and low bureaucracy, and you'd rather build the system than personally do every task.
• This role is not a good fit for you
• You're looking to step away from technical work entirely at this level.
• You prefer to lead through mandate and process rather than partnership and example.
• You're sceptical of automation, AI, or of leaning on signal from partner teams.
• How you'll develop in this role
• Get hands‑on with the company's application security landscape, understanding our attack surface across payment systems and multi‑region infrastructure, and forming your own view of where the real risk sits.
• Stand up clear vulnerability reporting and a risk‑ranked remediation approach, and get key vulnerabilities patched proactively ahead of our next compliance audit.
• Build trust with engineering squads and start shifting the security culture, so teams come to you early rather than late.
• Integrate into the Cybersecurity team, connecting with Dev Sec Ops, Sec Ops, and Risk & Compliance, and begin shaping the roadmap and KPIs that carry the program into 2027.

Show me the benefits!

• Your own the company card (no more out‑of‑pocket spending!)
• Lunch is on us for your work days - enjoy catered meals or receive a lunch allowance based on your local office
• Comprehensive private healthcare - depending on your location, coverage options include Vitality, Alan or Médis
• We offer 25-28 days of holiday (depending on your location) + public holidays
• For our Team, we offer both hybrid and fully remote working options
• Option to purchase 5 additional days of holiday through a salary sacrifice
• We use Mynd Up to give our employees access to free mental health and well‑being support with great success so far
• Paid parental leave - we want to make sure that we're supportive of families and help you feel that you don't have to compromise your family due to work
• The interview process

We want to ensure you are set-up for success and understand what will be expected of you. If your application is successful, our interview process is as follows:

• Intro call: A 30‑minute chat with our Talent Partner to discuss the role, your background, and how you feel about the player‑coach shape of the job.
• Hiring Manager interview: a 60‑minute conversation with our security management team, covering your App Sec depth, your evidence of maturing an existing program, and your partnership mindset.
• Technical interview: a 60‑minute deep dive with our App Sec team on your hands‑on application security expertise.
• Cross‑functional interview: a 30‑45 minute conversation with Privacy, Legal, and Risk & Compliance on how you work across those boundaries.
• Leadership interview: a 45‑minute conversation on mentoring and growing engineers, and influencing without authority.

About your application

English first. Since it's our company language, please submit your application in English. You’ll be using it a lot if you join us.

• A fair look for everyone.

Our talent team reads every single application to ensure the process is fair.

To keep things running smoothly, we only accept applications through our system—our support team can’t pass on calls or emails.

• Diversity drives us.

We can only reach our goals if our team reflects the world around us.

That starts with you hitting apply, even if you don't tick every single box.

We encourage people from all backgrounds and experiences to join us.

• Interview at your best.

We want you to feel comfortable throughout the process.

If you have any accessibility requirements or need a specific format, email ----- We’ll design a process that works for you.

• Your data is safe.

When you apply, we process your personal data as a data processor.

For more information on how the company processes personal data, read our Privacy Policy here.

• Applying for multiple roles?

Nothing is stopping you, and we assess every role independently.

However, we do look for alignment, so make sure you can explain why your interest and experience are right for each specific role.

• Reapplying. If you’re applying for the same role again, please wait six months from your last decision before hitting submit.
• The location

Please note: We can hire on a remote, hybrid or in-person set-up in any of the locations listed on the advert but you will need to be physically based in the country of your choice with a valid right to work.

We are unable to offer visa sponsorship for this role in any of the listed locations.

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