Senior AI-Powered Infrastructure Security Engineer

Unlimit; Belgrade (MT); On-site; USD 140,000 - 190,000; Full time

Job summary

Unlimit is seeking a Senior Infrastructure Security & Operations Engineer to strengthen its security posture across a global fintech infrastructure. You will combine security engineering with detection, response, and automation to protect cloud, containerised, and on‑premise environments.

The role emphasizes AI‑powered automation and agentic workflows to continuously improve cyber defence capabilities. You will lead incident response, vulnerability management, secure configurations, and threat

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.
• 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.
• 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.

Skills

Security Operations

SIEM

Threat Hunting

Incident Response

Linux / OS hardening

Cloud security (AWS)

Kubernetes security

Python automation

EDR/XDR

Tools

AWS

Kubernetes

Container technologies

Python

Terraform

GitLab

REST APIs

Claude / AI tooling

Job description

Unlimit is seeking a Senior Infrastructure Security & Operations Engineer to strengthen its security posture across a global fintech infrastructure. You will combine security engineering with detection, response, and automation to protect cloud, containerised, and on‑premise environments.

The role emphasizes AI‑powered automation and agentic workflows to continuously improve cyber defence capabilities. You will lead incident response, vulnerability management, secure configurations, and threat