Senior Infrastructure Security & Operations Engineer

📋 Job Overview

Unlimit is seeking a Senior Infrastructure Security & Operations Engineer to strengthen our infrastructure security and operational cyber defence capabilities. This role involves transforming traditional security operations through AI-powered and agentic automation, designing intelligent security workflows, and improving cyber defence effectiveness.

🏢 About Unlimit

Unlimit is a global fintech ecosystem built to eliminate financial borders holding businesses back. The company provides the extensive infrastructure needed to scale globally, integrating payment processing, multi-currency business accounts, BaaS and crypto gateways into a single, intelligent platform. Across 17 offices globally, Unlimit bridges hyper-local expertise with a high-capacity financial network, giving companies the agility to expand across regions with operational confidence and speed.

🎯 The Role

As a Senior Infrastructure Security & Operations Engineer, you’ll be a hands-on technical expert responsible for strengthening Unlimit’s infrastructure security and operational cyber defence capabilities. You’ll combine security engineering, detection and response, vulnerability management, and cloud security expertise to protect our technology ecosystem against evolving threats.

✅ Key Responsibilities

• Own and continuously improve infrastructure security controls across Unlimit’s global technology environment.
• Operate and enhance internal Security Operations, including security monitoring, alert triage, incident investigation, and response.
• Develop and maintain detection engineering capabilities, including SIEM correlation rules, detection use cases, log analysis, and security monitoring integrations.
• Conduct proactive threat hunting and leverage cyber threat intelligence to identify emerging threats and improve defensive capabilities.
• Lead technical incident response activities, including investigation, containment, remediation, and post-incident improvements.
• Manage infrastructure vulnerability assessment and remediation processes, including vulnerability scanning, prioritisation, tracking, and validation.
• Implement and continuously improve infrastructure hardening and security configurations across servers, endpoints, networks, and cloud environments.
• Develop and maintain security controls across AWS, Kubernetes, and containerised environments.
• Own and optimise endpoint protection and detection capabilities, including EDR/XDR technologies.
• Contribute to network security, directory security, and infrastructure security architecture reviews.
• Administer, integrate, and continuously improve security technologies, including SIEM, EDR/XDR, vulnerability management, and infrastructure security platforms.
• Coordinate external penetration testing activities within the infrastructure security scope, validate findings, and support remediation.
• Provide technical support for IT and Information Security audits, including evidence collection, technical control validation, and remediation of identified gaps.
• Collaborate closely with Infrastructure, DevOps, Engineering, and Application Security teams to implement practical and scalable security improvements.

AI & Agentic Security Automation

• Design, develop, and maintain AI-powered and agentic security automation as a core part of Cyber Security operations.
• Build autonomous and semi-autonomous workflows for security alert triage, investigation, enrichment, and response.
• Develop AI-assisted detection engineering, threat hunting, and threat intelligence processing capabilities.
• Automate vulnerability analysis, risk-based prioritisation, and remediation workflows.
• Build custom security integrations, automation scripts, and internal security tools using Python, APIs, and modern AI development frameworks.
• Leverage LLMs and agentic development tools, including Claude, to improve security operations efficiency and engineering productivity.
• Ensure AI-powered security workflows incorporate appropriate validation, access controls, and human oversight for sensitive or high-impact actions.

📌 Required Qualifications

• 6+ years of hands-on engineering experience, including at least 4 years in Cyber Security, Infrastructure Security, or Security Operations.
• Strong technical background in IT infrastructure, systems engineering, cloud engineering, or platform engineering.
• Proven experience implementing and maintaining infrastructure security controls in complex production environments.

⭐ Desirable Experience

No specific desirable experience mentioned.

🎁 Benefits

Competitive salary and benefits package.

🛂 Visa & Eligibility

No specific visa or eligibility information mentioned.