Summary: Paymentology is seeking a Senior Security Engineer to critically engineer, operate, and improve security controls across various environments, focusing on detection, response, and secure-by-default practices. Highlights: 1. Lead complex security incident investigations and threat hunting. 2. Design and implement SIEM/XDR detections and security analytics. 3. Integrate security tooling into CI/CD pipelines for secure delivery. At **Paymentology**, we’re redefining what’s possible in the payments space. As the first truly global issuer\-processor, we give banks and fintechs the technology and talent to launch and manage Mastercard and Visa cards at scale across more than 60 countries. Our advanced, multi\-cloud platform delivers real\-time data, unmatched scalability, and the flexibility of shared or dedicated processing instances. It’s this global reach and innovation that sets us apart. We’re looking for a **Senior Security Engineer** to play a critical hands\-on role in engineering, operating, and continuously improving Paymentology’s security controls across cloud, identity, application, network, endpoint, and data environments. This role is focused on detection and response, secure\-by\-default engineering, automation, and close collaboration with engineering teams to embed security into platforms and delivery pipelines. Requirements: **What it takes to succeed:** * 5\+ years of experience in security engineering roles. * Strong expertise in AWS and Azure cloud environments, with Kubernetes experience considered beneficial. * Hands\-on experience with SIEM and XDR platforms such as Splunk, KQL, or Chronicle. * Deep knowledge of identity and access management including SSO, SAML/OIDC, PIM/PAM, and SCIM. * Practical experience using infrastructure and automation tools such as Terraform, Python, Bash, or PowerShell. * Experience integrating security controls into CI/CD pipelines and modern delivery workflows. * Proven ability to work autonomously, prioritise effectively, and lead complex investigations end to end. * Strong collaboration skills with the ability to influence engineering teams and act as a trusted security advisor. * Clear written and verbal communication skills with a strong focus on documentation and knowledge sharing. **** What you get to do:: * Design, implement, and continuously tune SIEM and XDR detections and security analytics. * Lead complex security incident investigations and conduct advanced threat hunting activities. * Engineer and maintain cloud security guardrails across AWS and Azure environments. * Integrate security tooling and controls directly into CI/CD pipelines to enable secure\-by\-default delivery. * Own vulnerability detection, prioritisation, and remediation workflows across platforms. * Develop and maintain SOAR playbooks and security automation scripts. * Produce and maintain clear security documentation while mentoring and supporting other engineers. What you can look forward to:: At **Paymentology**, it’s not just about building great payment technology, it’s about building a company where people feel they belong and their work truly matters. You’ll join a diverse, global team committed to strengthening secure financial ecosystems at scale. Whether you’re collaborating across time zones, solving high\-impact security challenges, or helping uplift engineering capability, you’ll find purpose, autonomy, and room to grow in a supportive and forward\-thinking environment. Travel: \< 10%