Senior Product Security Engineer

The role is about:

We are looking for a Senior Product Security Engineer to build product security across our engineering organization. You will build the practice, not inherit it. Reporting to the Head of Information Security, you will embed security directly into the software development lifecycle — from architecture and design through build, deployment, and remediation. You will introduce security gates into engineering workflows, select and operate the right application security tooling, and use AI and automation to increase security coverage without slowing product delivery.

Location: Fully remote from Portugal or Poland

Reporting to: Head of Information Security

What you will do:

Design and introduce security gates into the development lifecycle, including embeded secure release practices and guardrails into the way software is built and deployed.

Lead threat modelling for new products and major changes

Provide secure-by-design input for new product builds across card issuing, embedded finance / banking-as-a-service, and other payment products

Define secure-by-default architecture patterns for the application layer — authentication, authorization, API design, service-to-service trust — so the secure path is the easiest path for engineering teams

Decide where traditional tooling is the right fit and where AI-assisted alternatives provide better coverage or efficiency

Own CI/CD pipeline and software supply-chain security controls across engineering teams

Implement and improve container image scanning, dependency management, software bill of materials, and security checks on infrastructure-as-code and deployment manifests

Build the practice AI-first - introduce AI agents and LLM-assisted workflows the default delivery mechanism for application security

Drive remediation of application-layer findings with engineering teams, including findings from penetration tests, scanners, and disclosure reports

What we need:

5+ years of experience in Product Security, Application Security in payments, fintech, banking, e-money, or another fintech product environment

Strong hands-on experience embedding security into the software development lifecycle

You read code comfortably and hold your own in design discussions with senior engineers

Proven experience with threat modelling, secure-by-design reviews, and working with engineers during architecture and delivery stages

Hands-on experience with application security tooling such as SAST, SCA, secrets detection, and DAST

Hands-on experience securing cloud-native applications on AWS or other major cloud

Strong AI proficiency and hands-on experience (agentic workflows and loops, RAG, MCP, etc)

Solid understanding of Cloud-first environment and modern development practices

Experience securing CI/CD pipelines and improving software supply-chain security