Application Security Engineer/Lead

Ajaib Group; Jakarta Pusat; On-site; IDR 750,000,000 - 1,350,000,000; Full time

Job summary

Ajaib Group in Jakarta is seeking an experienced Application Security Engineer/Lead to safeguard our digital financial services, mobile apps and crypto systems. You will champion SSDLC, scale threat modeling, and lead security testing programs.

Reporting to the Head of Security, you will align defense with OWASP, oversee CREST-aligned testing, and drive developer enablement through security training and a network of security champions across engineering teams.

Qualifications

• 8+ years in information security with 3+ years leading AppSec in fintech/digital banking.
• Strong coding background (Java/Python/Go/Node.js) and cloud-native architectures.
• Deep knowledge of OWASP, threat modeling, and secure coding practices.

Responsibilities

• Define and lead the AppSec program and secure coding across engineering teams.
• Standardize testing, code reviews, and vulnerability management around OWASP and SAMM.
• Oversee SAST/DAST/IAST/SCA in CI/CD and automate security testing in workflows.
• Lead threat modeling exercises and secure architecture reviews.
• Manage CREST-aligned external penetration testing and remediation tracking.
• Enable developers with ongoing secure coding training and security champions.

Skills

AppSec leadership

SSDLC

Java

Python

Cloud-native

Kubernetes

Docker

Mobile security

SAST/DAST/SCA

OWASP standards

CREST testing

Security certifications

Tools

Chekmarx

Semgrep

Snyk

Burp Suite Pro

SonarQube

GitHub

GitLab

Bitbucket

Job description

As the Application Security Engineer\\Lead, you will serve as the primary authority for ensuring the security, resilience, and integrity of our digital financial services, mobile platforms, and crypto systems. Reporting directly to the Head of Security, you will champion secure software development lifecycle (SSDLC) practices, scale our threat modeling capabilities, and manage security testing programs. You will be responsible for aligning our application defense with the OWASP framework and managing external penetration testing in accordance with CREST standards.

Key Responsibilities

• AppSec Program Leadership: Define and implement the enterprise Application Security strategy, ensuring secure coding practices are embedded across all engineering teams.
• Standardize application security testing, code reviews, and vulnerability management around OWASP Top 10, OWASP ASVS (Application Security Verification Standard), and SAMM (Software Assurance Maturity Model).
• Vulnerability & DevSecOps Management: Oversee the implementation and optimization of SAST, DAST, SCA, and IAST tools within CI/CD pipelines, triaging findings and guiding engineers on remediation. Automate SAST/DAST/SCA testing directly in developer workflows.
• Threat Modeling: Lead architecture review and conduct threat modeling exercises during early product design phases using frameworks like STRIDE, and champion secure coding standards across the engineering ecosystem.
• CREST-Aligned Penetration Testing: Manage the scoping, execution, and remediation tracking of external penetration tests, ensuring all third-party vendors and methodologies adhere strictly to CREST accreditation guidelines.
• Developer Enablement: Design and deliver continuous secure code training programs and champion a network of "Security Champions" within product engineering teams

• Experience: 8+ years of dedicated experience in information security, with at least 3+ years specifically leading application security or product security functions within fintech, digital banking, or e-commerce ecosystem.
• Technical Proficiency: Strong background in software development (e.g., Java, Python, Go, Node.js) and a deep understanding of cloud-native architectures (AWS/GCP, Kubernetes, Docker).
• Mobile & Tooling Expertise: Deep technical knowledge of mobile app vulnerabilities (reverse engineering, certificate pinning, secure storage) and extensive hands-on experience managing security tooling native to GitHub, GitLab and Bitbucket.Proficiency in SAST/DAST/SCA tools such as Chekcmarx, Semgrep, Snyk, Burp Suite Professional, and SonarQube.
• OWASP Mastery: Proven track record of applying OWASP standards to web, mobile, and API layers to systematically reduce application vulnerabilities.
• CREST/Testing Expertise: Clear understanding of CREST penetration testing standards; experience managing or executing CREST-accredited technical security assessments.
• Certifications: Possession of CREST certifications (e.g., CREST Registered/Certified Application Security Analyst) or equivalent expert-level practical certifications (e.g., OSCP, OSWE, CSSLP) is highly preferred.
• Communication: Exceptional capability to articulate complex software vulnerabilities as business risks to product owners and provide actionable technical fixes to engineers.

Join us as we make magic happen to increase Indonesia’s financial inclusion!