Sr IT Security Engineer

Powering the world’s payments ecosystem

ACI powers the payments ecosystem – globally, and you power ACI. You’ll innovate, collaborate, and grow – in an energetic technology culture with decades of proven success. ACIers – in all roles and levels – are truly your colleagues and many are your friends. Our size and reach allow you to see the global impact of your work. You are visible, your talents are valued, and you are empowered to shape the future of payments.

As a Sr IT Security Engineer in Pune, you will join a diverse, passionate team, dedicated to powering the world’s payments ecosystem!

About the Role

ACI Worldwide is seeking a Sr IT Security Engineer to help design, build, and operate security capabilities that protect our cloud platforms, applications, AI-enabled solutions, and enterprise infrastructure. This is a hands-on engineering role that combines cloud security, security operations, incident response, automation, and continuous security improvement.

You will work closely with engineering, cloud, platform, AI/ML, and operations teams to implement scalable security controls, strengthen detection and response capabilities, and support compliance and audit requirements.

Key Responsibilities

• Design and implement security controls across AWS and Azure environments.
• Build and enhance security operations capabilities, including SIEM/SOAR, detection engineering, alert triage, and incident response workflows.
• Support security investigations, incident response, and post-incident remediation activities.
• Improve identity and access management, encryption, logging, vulnerability management, and platform hardening controls.
• Develop automation, security tooling, standards, runbooks, and technical documentation.
• Partner with engineering teams to embed secure-by-design practices across applications, cloud services, and AI-enabled solutions.
• Participate in an on-call rotation supporting security incidents and escalations.
• Mentor junior engineers and contribute to security best practices across the organization.

Qualifications

Required

• 7+ years of hands-on experience in Security Engineering and/or Security Operations.
• Experience securing cloud environments, preferably across both AWS and Azure.
• Strong knowledge of SIEM/SOAR platforms, incident response, vulnerability management, and security monitoring.
• Experience supporting security incidents and on-call response activities.
• Strong communication, documentation, and stakeholder management skills.
• Ability to work independently and collaborate across multiple technical teams.

Preferred

• Experience with Python, PowerShell, Bash, Go, Ansible, or similar automation tools.
• Experience with Infrastructure-as-Code (IaC), Policy-as-Code, and continuous compliance frameworks.
• Knowledge of container and Kubernetes security.
• Experience with AI/LLM security, governance, testing, or monitoring.
• Exposure to regulated or audit-focused environments.
• Industry certifications such as CISSP, CCSP, AZ-500, AWS Security Specialty, GIAC, or equivalent.

Why Join ACI?

At ACI Worldwide, you'll help secure the technology that powers payments and commerce around the globe. You'll work with leading cloud and security technologies, collaborate with talented teams, and contribute to protecting critical systems used by financial institutions, merchants, and businesses worldwide.

Core Capabilities:

We seek colleagues who embody our core capabilities — these shape our culture and enable us to make a meaningful impact together:

• Ensure Accountability: holding self and others accountable to meet commitments.

• Drives Results: consistently achieving results, even under tough circumstances.

• Customer Focus: building strong customer relationships and delivering customer-centric solutions.

• Cultivate Innovation: creating new and better ways for the organization to be successful.

• Collaborates: building partnerships and working collaboratively with others.

• Courage: stepping up to address difficult issues, saying what needs to be said.

In return for your expertise, we offer opportunities for growth, career development, and a competitive compensation and benefits package—all within an innovative and collaborative work environment.

Are you ready to help us transform the payments ecosystem? To learn more about ACI Worldwide, visit our web site at www.aciworldwide.com

ACI Worldwide is an AA/EEO employer in the United States, which includes providing equal opportunity for protected veterans and individuals with disabilities, and an EEO employer globally.

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