Senior Platform Engineer

Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title and Summary
Senior Platform Engineer
Who is Mastercard?
Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential.
Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all.
Overview
The Global Routing and Edge Caching Services (GRECS) team within Global Network Operations is seeking an Engineer to ensure Mastercard's global name resolution, addressing, and mail relay services are fast, secure, and highly available. This India-based role focuses on the configuration, optimization, and operational support of enterprise DNS/DHCP infrastructure (Infoblox/IPAM), F5 Global Traffic Manager (GTM/BIG-IP DNS) for global traffic steering, and ProofPoint SMTP relays used for production email delivery.
The ideal candidate is passionate about core network services, thrives in a fast-paced environment, and enjoys solving complex challenges that directly impact Mastercard's always-on digital footprint.
Role
In this position, you will:
Operate and enhance enterprise DNS/DHCP/IPAM (Infoblox), including zone management, delegation, views, forwarding/conditional forwarding, DNSSEC where applicable, and DHCP scope design, policy, and reservations.
Configure and maintain F5 GTM (BIG-IP DNS) for global server load-balancing (GSLB): wide IPs, pools, health monitors, topology/geo-based steering, and disaster-recovery failover.
Provide operational support for ProofPoint SMTP mail relays within Mastercard's production environment, including diagnosing mail delivery delays, troubleshooting failed deliveries, and assisting application teams experiencing email-related impact.
Upgrade, patch, and maintain ProofPoint mail relay nodes; manage SSL/TLS certificate installations and renewals on relay infrastructure.
Partner with application, security, and platform teams to align mail relay operations with enterprise email delivery standards and compliance requirements.
Perform root-cause analysis and triage of incidents affecting DNS/DHCP/GTM or SMTP relays; drive swift mitigation and durable corrective actions within strict SLAs.
Implement automation and Infrastructure-as-Code (e.g., Terraform/Ansible/REST APIs) for repeatable changes, compliance evidence, and configuration drift control.
Maintain strong operational hygiene: monitoring/alerting dashboards, capacity and growth planning (zones, records, leases), backup/restore, and change governance (CRQs).
Create clear runbooks/SOPs and provide knowledge sharing to peers and partner teams.
Participate in an on-call rotation providing operational support for DNS/DHCP/GTM and mail relay services.
All About You
You have:
Hands-on expertise administering enterprise DNS/DHCP/IPAM platforms (Infoblox strongly preferred), including advanced features such as DNS views, RPZ, TSIG/AXFR/IXFR, and DHCP failover.
Experience managing ProofPoint SMTP relays or similar enterprise mail relay solutions in a production environment, including diagnostics of mail flow issues and server health.
Familiarity with TLS certificates for SMTP, including install, renewal, and associated DNS challenge records (e.g., ACME/DNS-01).
Working knowledge of F5 GTM (BIG-IP DNS) concepts: wide IPs, pools, monitors, topology-based load-balancing, GTM/LTM integration, and DR patterns.
Solid troubleshooting across TCP/IP, routing fundamentals, Anycast, SMTP, recursive vs. authoritative DNS, caching/TTL strategy, and client behavior (Windows/Linux).
Experience building automation for network and mail relay services (Terraform, Ansible, Python/PowerShell, and REST APIs).
Strong communication skills to explain complex issues to both technical and non-technical stakeholders; a bias for documentation and operational excellence.
Curiosity and initiative to learn, mentor, and continuously improve systems and processes.
Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

• Abide by Mastercard's security policies and practices;
• Ensure the confidentiality and integrity of the information being accessed;
• Report any suspected information security violation or breach, and
• Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.