Senior Penetration Tester (Fintech)

TL;DR

Senior Penetration Tester (Fintech): Performing proactive security assessments and vulnerability research for a high-scale financial platform with an accent on AI-assisted testing and offensive security. Focus on auditing Go/Python services, securing AI/ML systems, and mitigating complex threats in cryptocurrency and blockchain infrastructure.

Location: Must be based in Bellevue, WA with in-person attendance expected at least 3 days per week. This position is restricted to US citizens or lawful permanent residents.

Salary: $187,000–$220,000 USD (Zone 1)

Company

A mission-driven financial technology company democratizing finance through innovative, high-impact digital products.

What you will do

• Perform application security assessments, code reviews, and manual penetration testing of web services and infrastructure.
• Build and operate AI-assisted tools to increase testing throughput and coverage.
• Conduct threat modeling for high-impact systems and articulate security risks related to business logic and fraud.
• Collaborate with engineers to mitigate vulnerabilities and contribute detection strategies or direct code fixes.
• Research emerging threats and attack techniques to evolve offensive and defensive capabilities.
• Advocate for security and privacy across engineering and product development teams.

Requirements

• 5+ years of experience in penetration testing, application security, or security engineering.
• US citizenship or lawful permanent residency is required.
• Proficiency in auditing and exploiting Go and Python services.
• Experience targeting AI/ML systems and familiarity with cryptocurrency/blockchain security.
• Hands-on experience testing cloud environments (AWS/GCP) and container orchestration (Kubernetes).
• Strong grasp of application security principles and network protocols.

Nice to have

• Experience in the fintech industry or highly regulated environments.
• Demonstrated history of creatively solving complex security problems.

Culture & Benefits

• Performance-driven compensation including bonus programs and equity ownership.
• 100% paid health insurance for employees with 90% coverage for dependents.
• Lifestyle wallet for wellness and learning expenses.
• Employer-paid life and disability insurance, fertility benefits, and mental health support.
• Generous time off including company holidays, PTO, and parental leave.
• Catered meals and events in an energizing office environment.