PropertyGuru is Southeast Asia’s leading PropTech company, and the preferred destination for over 32 million property seekers monthly to connect with over 50,000 agents monthly to find their dream home. PropertyGuru empowers property seekers with more than 2.1 million real estate listings, in-depth insights, and solutions that enable them to make confident property decisions across Singapore, Malaysia, Thailand and Vietnam.
PropertyGuru.com.sg was launched in Singapore in 2007 and since then, PropertyGuru Group has made the property journey a transparent one for property seekers in Southeast Asia. In the last 18 years, PropertyGuru has grown into a high-growth PropTech company with a robust portfolio including leading property marketplaces and award-winning mobile apps across its markets in Singapore, Malaysia, Vietnam, Thailand as well as the region’s biggest and most respected industry recognition platform – PropertyGuru Asia Property Awards , events and publications across Asia.
For more information, please visit: PropertyGuruGroup.com ; PropertyGuru Group on LinkedIn .
Recognised as a Top Employers Certified* organisation, we’re proud to be among the best workplaces in the region—celebrating an inclusive culture of excellence, growth, and well-being.
At PropertyGuru, we strive to “Build Southeast Asia’s Trust Platform,” and security sits at the centre of that trust with our customers, agents, and partners across Singapore, Malaysia, Thailand, and Vietnam.
Role
We’re looking for a Lead Application Security Engineer to shape and drive our AppSec strategy across modern, high-scale web, mobile, API, data, and AI-powered products.
You’ll operate as a senior individual contributor and technical authority, partnering closely with engineering, product, and platform teams to embed security into every stage of the software development lifecycle. You’ll define standards and patterns, lead architecture-level risk assessments, build automation, run offensive testing against AI systems, and act as a trusted advisor helping teams ship secure products without friction.
Key Responsibilities
Evolve AppSec strategy across application types (web, mobile, APIs, data, AI/ML); define standards, secure-by-default patterns, and roadmap.
Own threat modelling as a practice: run structured sessions (STRIDE, DREAD or equivalent) with engineering teams on critical services and AI/ML pipelines, track identified risks to closure, and mature the program’s tooling and coverage.
Lead AI red teaming and adversarial testing of LLM-powered and agentic features - prompt injection, jailbreaks, insecure tool/plugin use, data exfiltration via RAG/vector stores, model/output integrity, and unsafe autonomous actions - and translate findings into engineering fixes and guardrails.
Embed security triage across the SDLC by automating SAST, SCA, IaC scanning, DAST/API testing, container scanning, and secrets detection.
Harden CI/CD pipelines (GitHub Actions, Jenkins) with least privilege, ephemeral credentials, provenance controls, and policy-as-code (OPA, CODEOWNERS, branch protection).
Lead vulnerability management using ASPM tools; automate triage, prioritisation, ticketing (Jira), SLA tracking, and reporting.
Drive application testing and assurance: logic/authZ validation, mobile testing (OWASP MASVS), and secure API design/testing.
Secure the software supply chain: signed artifacts, SBOMs, dependency vetting, container security, and CI/CD provenance.
Partner on Data and AI/ML security: data protection, vector database access control, model integrity, and privacy-by-design.
Mentor Developers and AppSec engineers, run training/code clinics, and improve developer experience with helpful tooling and fast feedback.
Maintain high-quality documentation and track actionable metrics (MTTR, coverage, SLA adherence, repeat issues, signal to noise ratio, etc.).
Who You Are
Qualifications
Bachelor’s or Master’s degree in Computer Science, Engineering, Cybersecurity, or…