Application Security Engineer — Build Secure, Scalable Systems

United States Digital Space LLC; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Private Medical Insurance

Pension and Life Insurance

27 days holiday plus volunteering days

Hybrid working

Job summary

Rightmove is seeking an Application Security Engineer to join its growing AppSec function in the UK. You’ll work with engineering teams to deliver day-to-day security tooling, vulnerability management, secure design, and threat modelling across the platform.

You’ll triage findings, support cloud security posture, run threat modelling sessions, and help evolve runbooks as the function matures. A hands-on security background and strong communication are essential.

Qualifications

• Practical experience in application security, security engineering or a related hands-on security role.
• Able to assess security findings in context, distinguish meaningful risk from tooling noise, and make pragmatic recommendations to engineering teams.
• Working proficiency in Python (able to read, modify, and write scripts used for internal tooling).
• Practical experience with DAST/SAST/SCA/secrets scanning tools (Aikido, Snyk, Semgrep,Checkmarx, or similar).
• Experience with Prisma Cloud or a comparable cloud-native security platform.
• Comfortable reading code and understanding CI/CD pipelines (GitLab CI or equivalent).
• Experience running or contributing to threat modelling exercises.
• Comfortable running recurring stakeholder syncs with engineering teams.
• Strong written communication.
• Able to triage and prioritise a high volume of inbound requests independently.

Responsibilities

• Vulnerability Management & Security Tooling.
• Support the rollout and operation of application security tooling across engineering repositories, including SAST, SCA and secrets detection.

Skills

Python

Security tooling

Threat modelling

CI/CD pipelines

SAST/SCA

Prisma Cloud

Vulnerability management

Communication

Tools

Aikido

Snyk

Semgrep

Checkmarx

Job description

Rightmove is seeking an Application Security Engineer to join its growing AppSec function in the UK. You’ll work with engineering teams to deliver day-to-day security tooling, vulnerability management, secure design, and threat modelling across the platform.

You’ll triage findings, support cloud security posture, run threat modelling sessions, and help evolve runbooks as the function matures. A hands-on security background and strong communication are essential.