Senior Application Security Engineer

Responsibilities

• ▹Shift security left across the SDLC — embed security into how PayFit builds software
• ▹Partner with product teams from design to deployment: threat modeling new features, reviewing architecture decisions, performing code reviews
• ▹Help developers internalize secure-by-default patterns
• ▹Drive offensive testing of applications, including with AI — run internal application pentests with an attacker mindset
• ▹Explore how AI can scale and deepen offensive testing, from automated reconnaissance to AI-assisted vulnerability discovery
• ▹Turn findings into concrete remediation plans and reusable detection patterns
• ▹Help define how PayFit builds software securely in the age of AI

About the company

PayFit is an intuitive software-as-a-service payroll and HRIS solution designed specifically for SMBs. Since 2015 its mission has been to simplify payroll for SMBs; it operates from three main countries (France, Spain, and the UK) and supports over 20,000 clients. Four core values shape its culture: Care, Excellence, Humility, and Passion.