Security Engineer II, Traffic Quality, Traffic Quality

Amazon is hiring a Security Engineer II, Traffic Quality, Traffic Quality in London, United Kingdom. Level rates it ; you can apply on Amazon.

Level's read on this job

Level rates this cybersecurity role Little AI ●○○○: aI is not part of the work.
The posting mentions Bedrock, Packet Inspectors and Debugging Tools among its tools and skills.
Level classes it as a mid-level role.
Amazon has 20,000+ other open roles on Level.

AI in this role

Research ad fraud threats, conduct targeted threat hunting, and reverse engineer malware to protect advertising traffic quality.

BedrockPacket InspectorsDebugging ToolsClient Side Scripting

threat-huntingreverse-engineeringnetwork-securitybotnet-mitigation

Advertising at Amazon is a fast-growing, multi-billion dollar business that spans across desktop, mobile and connected devices; encompasses ads on Amazon and a vast network of hundreds of thousands of third party publishers; and extends worldwide. Traffic Quality, within Amazon Advertising, builds technology to detect invalid traffic (IVT) and ensure that Advertiser spend worldwide is directed towards human audiences and protected from ad fraud.

As the Security engineering team within Traffic Quality, we research programmatic advertising risk landscapes to build an understanding of existing and emergent threats. We build specialized techniques to detect and mitigate these threats, contributing to a robust Traffic Quality platform that is a bedrock of advertiser trust and saves hundreds of millions of dollars in ad spend that would otherwise be lost to IVT. The Security Engineering team is responsible for: (a) Targeted threat hunting, including on the dark web, to consistently stay updated on modus operandi and risks associated with advertising fraud, (b) Building sophisticated mitigation techniques through reverse engineering known software, identifying network layer signatures, and conceiving client-side scripting methods, and, (c) Collaborating with security teams across Amazon for sharing intelligence and devising durable detection techniques.

As a Security Engineer in the team, you are passionate about unraveling ad fraud tactics utilizing a diversity of highly specialized skills in reverse-engineering, deep packet inspection of network traffic, understanding of network security, operating systems and browser architectures. You accomplish your tasks by applying expert level knowledge to tools to understand not only what a particular piece of malware for perpetrating ad fraud can do but also how it does it. You work with internal security teams to identify and mitigate botnets, as well as leverage the ethical hacking community to obtain standard modus operandi, source code and tactics used by malware and botnets. The role requires influencing leaders across the company to improve our security bar and protect advertiser trust. A Security Engineer also works with other product and security teams to proactively identify problems and suggest approaches to solve them.

Given the high level of ambiguity in the advertising fraud space, and the need to prepare for unknown unknowns, your creativity, judgement and bias for action will all be key ingredients towards delivering the right results for advertising customers.

Basic qualifications

- Bachelor's degree in computer science or equivalent
- Knowledge of networking protocols such as HTTP, DNS and TCP/IP
- Experience programming in Python, Ruby, Go, Swift, Java, .Net, C++ or similar object oriented language
- You have passion for reverse engineering, malware analysis, threat detection and risk hunting.

Preferred qualifications

- Experience with AWS products and services
- Experience with any combination of the following: threat modeling, secure coding, identity management and authentication, software development, cryptography, system administration and network security

Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We value your passion to discover, invent, simplify and build. Protecting your privacy and the security of your data is a longstanding top priority for Amazon. Please consult our Privacy Notice (https://www.amazon.jobs/en/privacy_page) to know more about how we collect, use and transfer the personal data of our candidates.

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.

How we rate this

Security Engineer II, Traffic Quality, Traffic Quality at Amazon rates 15 out of 100 for how much of the daily work is AI. That makes it Little AI (AI Level 1 of 4). The level is about AI in the job, not seniority.

Classification

Little AI. AI is not part of the work.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.

Key facts

Security Engineer II, Traffic Quality, Traffic Quality is an open job at Amazon.
Level rates this role AI Level 1 of 4: Little AI.
The role is based in GB, London.
The job was posted on September 11, 2026.
Seniority: mid.
Applications are handled by Amazon. Apply on Amazon

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

Threat HuntingReverse EngineeringNetwork SecurityBotnet MitigationBedrockPacket InspectorsDebugging ToolsClient Side Scripting

Also common in cybersecurity jobs at this level

Azure Google Cloud Kubernetes Terraform LLM AI agents

Pay

Typical cybersecurity job: $160k

This posting doesn't list pay. Use the typical cybersecurity figure when pay comes up. See cybersecurity jobs

Questions you could be asked

Tell me about a project where threat hunting was part of your work. What did you do?
Tell me about a project where reverse engineering was part of your work. What did you do?
Tell me about a project where network security was part of your work. What did you do?
Tell me about a project where botnet mitigation was part of your work. What did you do?
Walk me through how you've used Bedrock in your day-to-day work.

Adapt your resume

List these exact terms on your resume: Threat Hunting, Reverse Engineering, Network Security, Botnet Mitigation, and Bedrock. An applicant tracking system matches the wording, not the idea.
Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.

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