Application Security Engineer

Just Eat Takeaway.com; City Of London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Just Eat Takeaway.com is seeking an Application Security Engineer to join our security team in Greater London. You will work with global technology groups to ensure security controls are built into the software development lifecycle.

You will consult on features, run threat models, review designs, and educate partners to raise security standards across our platforms, services, and AI-enabled offerings. The role requires strong communication, practical security experience across web apps, and a

Qualifications

• Knowledge of OWASP Top 10 and how to design appropriate security controls.
• Experience with Secure Coding Tools (SCA, SAST & Secrets).
• Experience identifying and addressing vulnerabilities throughout the SDLC.
• Experience securing AI-enabled applications and assessing AI/LLM vulnerabilities.
• Strong communication and stakeholder management within and outside technology teams.
• Ability to guide and develop engineers on security best practices.
• Eagerness to continuously learn and improve security knowledge.

Responsibilities

• Translate security principles into requirements and controls across Just Eat Takeaway.com's platforms.
• Lead security reviews of varying scale including threat modelling, design review and code reviews.
• Assess vulnerabilities in AI-enabled applications and leverage AI tools for security analysis.
• Be a leading voice championing security with developers in technical and non-technical terms.
• Collaborate with stakeholders and work independently when needed.

Skills

OWASP Top 10

Secure Coding Tools

SDLC vulnerabilities

AI security

Communication

Stakeholder management

Mentoring engineers

Learning mindset

Tools

SCA, SAST & Secrets

Job description

Application Security Engineer

Location Details

Date: 2026-10-01

City: Barnet

Region: Greater London

Country Code: GB

Postal Code: EN4 8

Employment Type: Full Time

Application Deadline: 2026-10-29T18:00:55

Introduction

Ready for a challenge? Then Just Eat Takeaway.com might be the place for you. We're a leading global online delivery platform, and our vision is to empower everyday convenience. Whether it's a Friday-night feast, a post-gym poke bowl, or grabbing some groceries, our tech platform connects tens of millions of customers with hundreds of thousands of restaurant, grocery and convenience partners across the globe.

About this role

At Just Eat Takeaway.com, we've built a world-class security team that believes passionately in protecting our products, as well as the data of our customers and employees. As an application security engineer, you'll be working with our global Technology teams to ensure the right security controls are implemented throughout the SDLC.

You'll be a subject matter expert for your partners, able to context switch and adapt to the needs of our globally dispersed development teams working across multiple languages / tools / methodologies. You may be asked to consult on a time sensitive feature, facilitate a threat model for a new product, or deep-dive into a legacy application; no two days are the same.

We believe everyone should be responsible for security; a core component of every engagement will be education & awareness of our partners. The role requires a well-rounded and upbeat person who is passionate about making a positive impact to Just Eat Takeaway.com. They should be able to build collaborative relationships and drive lasting change to raise the bar of security in all our products and services.

Key Responsibilities

• Translate security principles into requirements and controls that can be understood and implemented across Just Eat Takeaway.com's platforms
• Lead security reviews of varying scale & depth including threat modelling, design review, consultation and code reviews to improve the overall security of our applications
• Assess vulnerabilities in AI-enabled applications and services, and leverage AI tools and agents to improve security analysis and developer enablement
• Be a leading voice, championing security with developers, in both technical & non-technical terms
• Work collaboratively with our key stakeholders, and also independently

What will you bring to the team?

• Experience defining controls for complex environments independent of the underlying platform or technology
• Detailed knowledge of OWASP Top 10, and in relation how to design appropriate security controls
• Experience working with Secure Coding Tools (SCA, SAST & Secrets)
• Experience in identifying & addressing vulnerabilities throughout SDLC, with the ability to switch between defensive & offensive mindset
• Experience securing AI-enabled applications and assessing common AI/LLM vulnerabilities
• Great communication skills, and proven stakeholder management both within and outside of technology departments
• Experience in guiding and developing engineers on best practice
• A passion for learning, always looking to identify opportunities to develop your own security knowledge

Our Culture

At JET, this is how we play

Our teams forge connections internally and work with some of the best-known brands on the planet, giving us truly international impact in a dynamic environment. Being the best at what we do isn't just about delivering on our strategy. It's a competition for something incredibly valuable - our customers' choice. Every time a customer decides where to order, they're picking a side.

At the heart of the JET Customer League are our values and behaviours. They guide every interaction, every decision, every innovation. These are the actions we need to perform consistently and brilliantly, to surpass the competition and earn our customers' loyalty, again and again. Fun, fast-paced and supportive, the JET culture is about movement, growth, helping one another to succeed and celebrating wins. By truly living our values and embodying our behaviours, we're building a customer-first culture which enables us to stay one step ahead of the competition.

Inclusion, Diversity & Belonging

No matter who you are, what you look like, who you love, or where you are from, you can find your place at Just Eat Takeaway.com. We're committed to creating an inclusive culture, encouraging diversity of people and thinking, in which all employees feel they truly belong and can bring their most colourful selves to work every day.

Additional Information

Want to know more about our JETers, culture or company? Have a look at our career site where you can find people's stories, blogs, podcasts and more JET journeys.