Application Security Engineer

Just Eat Takeaway.com; Langley; On-site; GBP 90,000 - 110,000; Full time

Job summary

Just Eat Takeaway.com in Slough, Berkshire, is hiring an Application Security Engineer to join a world-class security team. You will work with global technology teams to implement robust security controls throughout the SDLC, and become a subject matter expert for partners across languages and tools.

You will translate security principles into practical requirements, lead threat modelling, and conduct design and code reviews to strengthen our applications.

Qualifications

• Experience implementing security controls across complex environments.
• Strong knowledge of OWASP Top 10 and secure coding practices.
• Experience with Secure Coding Tools (SCA/SAST) and secrets management.

Responsibilities

• Translate security principles into requirements and controls across Just Eat Takeaway.com's platforms.
• Lead security reviews including threat modelling, design review, and code reviews to improve application security.
• Assess vulnerabilities in AI-enabled applications and leverage AI tools to enhance security analysis.
• Be a leading voice championing security with developers in technical and non‑technical terms.
• Work collaboratively with stakeholders and independently.

Skills

OWASP Top 10

Secure Coding Tools

Stakeholder management

Engineering mentoring

AI security

Tools

SCA

SAST

Secrets management

Job description

Application Security Engineer

2026-10-01T00:00:00

Slough

Berkshire

GB

SL1 1

Full Time

2026-10-29T18:00:54.473

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 components of the position

• 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
• You will have a passion for learning, always looking to identify opportunities to develop your own security knowledge

Our culture at JET

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.

What else are we delivering?

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.

Join us

Are you ready to join the team?

#s1-Gen

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.

These are some of the key components to the position: Translate security principles into requirements and controls that can be understood and implemented across Just Eat Takeaway.com's platformsLead security reviews of varying scale & depth including threat modelling, design review, consultation and code reviews to improve the overall security of our applicationsAssess vulnerabilities in AI-enabled applications and services, and leverage AI tools and agents to improve security analysis and developer enablementBe a leading voice, championing security with developers, in both technical & non-technical termsWork 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 technologyDetailed knowledge of OWASP Top 10, and in relation how to design appropriate security controlsExperience working with Secure Coding Tools (SCA, SAST & Secrets)Experience in identifying & addressing vulnerabilities throughout SDLC, with the ability to switch between defensive & offensive mindsetExperience securing AI-enabled applications and assessing common AI/LLM vulnerabilitiesGreat communication skills, and proven stakeholder management both within and outside of technology departmentsExperience in guiding and developing engineers on best practiceYou will have a passion for learning, always looking to identify opportunities to develop your own security knowledge.

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.

What else are we delivering?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.

#LI-RB1