Senior Security Engineer establishing and maintaining cybersecurity measures for a financial services company. Responsible for leading security event responses, documentation of policies, and training.
About the role
- Senior Penetration Tester defending fintech platform from payment fraud and cyber threats. Leading offensive security assessments to enhance fraud defenses and ensure customer trust.
Responsibilities
- Lead penetration testing engagements focused on payment abuse, transaction manipulation, and business logic exploitation.
- Design and execute automated attack simulations to test our defenses against: Carding and BIN attacks
- Credential stuffing and account takeovers
- Checkout and payment flow abuse
- API-level enumeration and fraud
- Build custom tooling and frameworks to mimic the behavior of real-world fraudsters and cybercriminals.
- Partner with fraud engineering, product security, and risk teams to identify weak points in our controls, detection systems, and architecture.
- Conduct threat modeling and red teaming exercises related to payments, authentication, and user account abuse.
- Document findings in technical reports with clear risk impact, exploitability, and remediation guidance.
- Mentor junior testers and contribute to a culture of security innovation and continuous improvement.
Requirements
- 7+ years of experience in offensive security, penetration testing, or red teaming.
- Strong background in payment systems, financial fraud tactics, and transaction-level attack surfaces.
- Fluency in scripting and automation (e.g., Python, JavaScript, Go, Bash) to simulate attacker workflows at scale.
- Familiarity with tools like Burp Suite Pro, Selenium, Scapy, ffuf, SQLMap, Metasploit, and bot automation frameworks.
- In-depth knowledge of fintech technologies (e.g., tokenized payments, card vaulting, 3DS, ACH, real-time payment APIs).
- Solid grasp of common attacker techniques: carding, fake identity generation, bypassing rate limits, evading fraud filters, and abusing web/app logic.
- Strong communication skills for explaining findings to both technical and non-technical audiences.
- Certifications: OSCP, OSEP, GWAPT, GPEN, GCPN, GXPN, GX-PT, CPSA/CRSA by CREST, CHECK, or TIGER.
- Prior experience in a fintech, digital banking, or payment gateway environment.
- Familiarity with OWASP Automated Threats, PCI DSS, MITRE ATT&CK for Financial Services, or fraud detection systems.
- Experience building or testing real-time risk scoring engines and fraud defense pipelines.
Benefits
- 401k with employer match
- medical, dental, vision
- 12 paid holidays in the year 2025
- 1 hour of sick pay accrual for every 30 hours worked
- parental leave
- life insurance
- disability insurance
- accident and illness insurance
- health and dependent care flexible spending accounts
- wellness benefits
- flexible time off for all full-time employees
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