Application Security Engineer

Our vision is to give everyone the belief they can make their move. We aim to make moving simpler, by giving everyone the best place to turn to and return to for access to the tools, expertise, trust, and belief to make it happen.

We’re home to the UK’s largest choice of properties and are the go-to destination for millions of people planning their next move, reading the latest industry news, or just browsing what’s on the market. Application Security Engineer Purpose This  is the first engineering hire into Rightmove's growing Application Security function,reporting to the Lead Application Security Engineer. You'll work closely with engineering teamsto deliver day-to-day App Sec capabilities across security tooling, vulnerability management,secure design and threat modelling, while helping shape how Application Security operates asthe function matures.

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

Triage and classify security findings across repos, driving remediation of the secrets backlog

Manage the day-to-day operation of vulnerability management, including findings triage,monitoring and engineering engagement.

Maintain engineer-facing guidance for resolving vulnerabilities and requesting exceptions

Cloud Security Support cloud security posture management through Prisma Cloud, including findings triage,monitoring and engagement with relevant engineering/platform teams.

Engineering Team Engagement Run a risk-tiered engagement cadence with engineering teams based on SLA compliance

Security Reviews & Triage Triage inbound security requests per the App Sec triage SLAConduct secure design and API security reviews for new services, integrations, and RFCs Review and respond to penetration test requests and third-party integration reviews

Threat Modelling Facilitate threat modelling sessions using the team's runbook/guide

Work with engineering teams to establish and improve threat modelling practices across squads

Process & Documentation Maintain runbooks and process documentation as the function matures

Support recurring review cadences (e.g. access reviews, vulnerability audits)
Requirements Must have:

Practical experience in application security, security engineering or a related hands-onsecurity role

Able to assess security findings in context, distinguish meaningful risk from tooling noise, andmake 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 (Git Lab 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

Nice to have:

Exposure to GCP security controls

Familiarity with supply-chain security (npm/PyPI dependency risks)
Prior experience in a scaling/greenfield security function

Success in first 6 months

Fully ramped on Aikido, independently supporting rollout, triage and day-to-day operations

Cloud Security handover complete: backlog triaged, monitoring cadence running

Risk-tiered engagement cadence live and running its first full cycle

Independently triaging and closing security review requests within SLAIndependently facilitating threat modelling sessions with engineering teams

Identified and delivered improvements…