Senior Application Security Engineer

FULL-TIME ROLE — Senior Application Security Engineer (SDLC)

Employment Type: Full-Time

Location: Amsterdam (Hybrid)

About the Company

Our client is a fast-moving fintech innovator operating at global scale. Their platforms power real-time, high-volume trading and financial operations across multiple markets—demanding relentless performance, precision, and security.

You’ll be joining a small, elite engineering group where security is treated as a first-class product, not a checkbox. This is an environment where your technical depth will be respected, your ideas will shape architecture, and your work will directly protect mission-critical systems.

The Opportunity

This is not a typical AppSec role. You’ll step into a position where security is woven deeply into the engineering culture. You’ll collaborate directly with senior engineers, technical leads, and product decision-makers to embed secure practices across the full SDLC.

If you come from a strong software engineering or backend development background and have since carved your path into application security , this role gives you the chance to lead and influence security strategy for an entire fintech ecosystem.

What You’ll Do

• Dive deep into code to uncover logic flaws, race conditions, and subtle vulnerabilities.
• Partner with product owners and engineers to architect secure solutions from the ground up.
• Lead the implementation and tuning of SAST, DAST, and SCA tooling.
• Manage and evolve the company's bug bounty program; triage and validate external vulnerability reports.
• Ensure alignment with major compliance frameworks (e.g., SOC 2, ISO 27001).
• Coordinate high-impact security audits including black-box, red team, and purple team engagements.
• Evaluate and conduct due diligence on third-party systems and integrations.

What You Bring

• Bachelor's degree in Computer Science, Information Security, or equivalent experience.
• 8+ years in Security Engineering or Application Security.
• A deep technical foundation in software development (e.g., backend, distributed systems, performance-critical applications).
• Strong knowledge of cloud security, web application security, and Linux systems.
• AppSec-related certifications are a plus (e.g., OSWE, OSCP, GWAPT, GIAC certs).

Why This Role Is Exceptional

• You’ll be part of a high-caliber team where security engineering is taken seriously.
• You’ll influence company-wide security posture and technical direction.
• You’ll work on complex, high-impact challenges in a cutting-edge fintech environment.

Benefits

• Competitive compensation + performance bonuses
• Health, dental & vision coverage
• Pension/retirement plan with employer match
• Continuous professional development budget
• A collaborative, engineering-driven culture