Senior Platform Engineer

Senior Platform Engineer - Networking Mastercard is a global technology company that powers economies and empowers people in over 200 countries and territories worldwide. This role is part of the Platform Engineering team, responsible for delivering secure, high‑performing network services across enterprise, live, and test environments. Overview We are seeking a highly skilled Senior Network Platform Engineer to join our team and play a critical role in delivering secure, resilient, and high‑performing network services. The position focuses on supporting the Vocalink International business across live, test, and disaster recovery environments and includes participation in a 24x7x365 standby rota. Responsibilities Provide 2nd and 3rd line support, build services, and consultancy to the business. Take ownership and accountability for all network‑related issues across the Service Delivery Life Cycle. Deliver effective incident management, including internal and external team communication and resolution. Manage and implement all approved technical changes and fault resolutions, adhering strictly to change management policies and procedures. Follow internal and external procedures to ensure smooth delivery of work streams and projects. Work independently and collaboratively, liaising with external infrastructure teams and departments to resolve complex issues. Define, develop, and improve procedures to enhance efficiency and benefit the wider team. Produce and maintain comprehensive documentation (playbooks, diagrams, Confluence entries) to ensure consistency in processes, mentoring, and repeatable practices. Ensure compliance with all relevant build standards, configuration templates and audit responsibilities e.g. PCI, ISO, ISAE. Mentor and train across the team to develop technical skills and capabilities. Show commitment to continuous process improvement and a One‑Team ethos across Architecture, Build, and Run. Experiences Industry‑recognized accreditation (CCNP minimum, essential; Palo Alto, and F5 certifications are desirable). Strong knowledge of IP networks, TCP/IP technologies (DNS, SNMP, etc.). Strong Routing, Switching and Firewall skills are essential. Strong knowledge of routing protocols (OSPF, BGP, EIGRP) and Layer 2/3 technologies (SVIs, STP variants, HSRP or equivalent), with practical experience across both enterprise and service provider environments. Proven ability to troubleshoot and resolve faults, performance issues, and configuration problems. Solid understanding of security and encryption technologies (PKI, SSL/TLS, IPSec, SSH, HTTPS). Experience in mitigating vulnerabilities (weak ciphers, expired certificates, misconfigurations, version upgrades). Experience in audit and risk tracking, mitigating vulnerabilities (weak ciphers, expired certificates, misconfigurations, version upgrades). Experience in automation and scripting, using Ansible Tower, Ansible playbooks, AS3, and Python. Familiarity with network management tools such as Splunk, NetBrain, SolarWinds, NNMi, Tufin, CMDB, inventory/hardware management platforms, and Wireshark. Atlassian experience (Jira, Confluence), and Agile frameworks (Scrum, Kanban, SAFe). Strong verbal and written communication skills. Experience in vendor management and engagement. Background in financial or banking environments (beneficial). Flexibility to travel between sites; must hold a valid driving licence and own a car. Willingness to undergo clearance checks. Above all, the role requires adaptability, a commitment to continuous learning, and readiness to tackle new challenges. Work Conditions Hybrid working. Supports a 7 by 24 Global Network. May require occasional travel. Corporate Security Responsibility 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; Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines. Seniority level Mid‑Senior level Employment type Full‑time Job function Engineering and Information Technology Industries Financial Services, IT Services and IT Consulting, and Technology, Information and Internet #J-18808-Ljbffr