Application Security Engineer

About the role

We’re looking for an intermediate Application Security Engineer to join our Information Security Team. You will play a critical role in securing Paystack’s rapidly growing fintech platform and ensuring customers’ trust remains unwavering.

Key responsibilities

• Conduct web, mobile, and API security assessments, including threat modelling, secure code reviews, and attack‑surface analysis.
• Manage the vulnerability lifecycle, coordinate internal and external assessments, and track remediation progress.
• Integrate secure coding practices into the SDLC, collaborate with developers and testers, and contribute to security frameworks aligned with OWASP, NIST, and MITRE.
• Support incident response by investigating application security incidents and implementing preventative measures.
• Stay up‑to‑date with cybersecurity trends, research innovative solutions, and improve security assessment processes.

Required profile

• Minimum 3 years of experience in application security, IT security, or secure software development.
• Hands‑on experience with penetration testing, vulnerability assessments, and secure code reviews.
• Proven experience with SAST, DAST, and threat‑modelling frameworks.
• Practical knowledge of secure software development practices (OWASP Top 10, CWE).
• Hands‑on development or scripting ability (Python, JavaScript, Bash).
• Strong understanding of web, API, and cloud security concepts (AWS, Azure, GCP).
• Understanding of DevSecOps principles and CI/CD security integration.
• Excellent communication skills to explain complex security concepts to technical and non‑technical audiences.

Required skills

• Penetration testing
• Vulnerability assessments
• Secure code reviews
• SAST
• DAST
• Threat modelling
• OWASP Top 10
• CWE
• Python
• JavaScript
• Bash
• AWS
• Azure
• GCP
• CI/CD security integration
• DevSecOps

What we offer

• Competitive compensation package with Stripe equity
• Full medical coverage and wellbeing stipend
• Generous leave and sabbatical policies
• Hybrid working environment
• Smart, kind colleagues invested in your growth