Senior Cybersecurity Engineer

paypal pte. ltd.; Singapore; Sur place; SGD 120 000 - 180 000; Plein temps

Résumé du poste

PayPal is seeking an experienced Offensive Security professional to perform hands-on penetration testing across web, mobile, API, and internal infrastructure. You will validate findings, reproduce exploit scenarios, and assess business impact with actionable remediation guidance.

You will work with product, infrastructure, and engineering teams, applying cloud and network security expertise and MITRE ATT&CK knowledge to drive secure development across the lifecycle.

Qualifications

• Bachelor's degree or higher in Information Security, Computer Science, or related discipline.
• At least five years of hands-on penetration testing experience, covering scope to remediation.
• Experience across domains: network, cloud, web, API, mobile, thick client.
• Knowledge of application and network security, cloud environments, identity flows, MITRE ATT&CK.
• Familiarity with PTES and OWASP testing methodologies.
• Scripting ability in Python, PowerShell, or Perl.
• Strong writing and communication skills; ability to present findings and remediation guidance.
• Security certifications (OSCP, OSCE, GPEN, etc.) are a plus.

Responsabilités

• Scope and perform penetration tests from planning through reporting and remediation support.
• Hands-on testing of web, mobile, APIs, and internal infrastructure.
• Network penetration testing and segmentation testing across internal, external, and cloud environments.
• Cloud penetration testing, focusing on configuration weaknesses and IAM issues.
• Reviewly potential vulnerabilities identified via AI-assisted code reviews and tools.
• Reproduce findings, assess exploitability, business impact, and remediation priority.
• Communicate findings with context, steps, and practical remediation guidance.
• Support engineering teams through remediation and closure of findings.

Connaissances

Penetration testing

Cloud security

Network security

Web application security

Mobile security

Thick client security

Scripting (Python, PowerShell, Perl)

Formation

Bachelor's degree or higher in Information Security, Computer Science, or related field

Outils

PTES

OWASP

Description du poste

The Offensive Security team helps protect PayPal and its brands by testing products, applications, networks, cloud environments, infrastructure, and emerging technologies. We work closely with engineering and infrastructure teams to identify security issues, explain the risk, and support effective remediation.

This role combines hands‑on penetration testing with vulnerability validation across application, network, and cloud environments. You will review findings from AI assisted code reviews and other automated security tools, reproduce potential vulnerabilities, and assess their exploitability and business impact. You will also perform targeted manual testing and secure code reviews to identify complex issues, including business logic weaknesses that automated tools may not fully understand.

The Offensive Security team works with groups across PayPal to assess the security of products, networks, and technologies throughout the product development life cycle. The team performs authorized testing across web, mobile, API, thick client, network, cloud, infrastructure, and other technology environments.

The successful candidate will be comfortable working with product, infrastructure, and engineering teams and will provide clear technical context, reproduction steps, realistic attack scenarios, and practical remediation guidance.

In your day‑to‑day role you will be responsible for:

• Scope and perform penetration tests from planning through reporting and remediation support.

• Perform hands‑on testing of web applications, mobile applications, APIs, and internal infrastructure.

• Perform network penetration testing and segmentation testing across internal, external, and cloud network environments.

• Perform cloud penetration testing across cloud service provider environments, assessing configuration weaknesses, identity and access issues, and privilege escalation paths.

• Review and validate potential vulnerabilities identified through AI assisted code reviews and other automated security tools.

• Reproduce findings and assess exploitability, business impact, severity, remediation priority, and whether a finding is a false positive.

• Understand cloud environments, network architectures, identity flows, and common attacker techniques.

• Evaluate AI and ML systems and use automation to improve the efficiency and depth of testing.

• Communicate findings with clear context, reproduction steps, attack scenarios, and practical remediation guidance.

• Support engineering and infrastructure teams through remediation and closure of security findings.

• Assess systems against requirements such as PCI DSS and provide actionable remediation guidance.

• Conduct security research and contribute to other Offensive Security initiatives as needed.

What do you need to bring:

• Bachelor's degree or higher in Information Security, Computer Science, or a related technical discipline.

• At least five years of hands‑on penetration testing experience, including the ability to manage assessments from scoping through reporting and remediation support.

• Strong hands‑on experience across one or more penetration testing domains such as network, cloud, web application, mobile, or thick client, with the ability to work across multiple domains.

• Knowledge of application and network security, cloud environments, identity flows, and the MITRE ATT&CK framework.

• Experience with testing approaches such as PTES and OWASP.

• Proficiency in at least one scripting language, such as Python, PowerShell, or Perl.

• Strong writing, communication, attention to detail, and critical thinking skills.

• Security certifications such as OSCP, OSCE, OSEE, or GPEN are a plus.