Senior Specialist - Architecture

Senior Specialist - Architecture

Purpose

Fiserv requires a very senior handson datacenter network engineer to support APAC datacenter build migration and relocation activities The resource will be embedded with the Fiserv Network Services team and will work under Fiserv technical direction on a time and material basis

The role is intended for an expertlevel engineer who can operate independently in very large and complex network environments take ownership quickly produce highquality implementation artefacts and support production cutovers without needing close supervision

2 Engagement Model

Commercial model time and material

Fiserv retains technical ownership architecture ownership and change approval authority

The supplier provides a named engineer availability commitment replacement process and delivery governance

The engineer will work as an extension of the Fiserv team and will be directed through Fiserv project operational and change governance

Work will include designreadiness review implementation support migration planning change preparation approved change execution documentation and stabilization support

All production activity must be executed through approved Fiserv change processes and agreed implementation windows

3 Seniority and Profile

Expertlevel datacenter network engineer with deep handson implementation and troubleshooting capability

Expected to operate at the level normally associated with senior enterprise or serviceprovider network experts without requiring the role description to reference specific certifications

Able to work independently challenge weak assumptions constructively and turn ambiguous technical requirements into executable plans

Proven experience in very large enterprise serviceprovider or hyperscalestyle environments Hyperscaler experience is a strong advantage

Strong ownership mindset high urgency and willingness to prove capability quickly through delivery quality

Comfortable working in highpressure production environments including outofhours and weekend change windows when required

4 Core Responsibilities

Support datacenter network build and migration activities across Cisco Arista and associated routing environments

Review HLDLLD material and identify implementation gaps dependency gaps risk points and required clarifications

Prepare or validate lowlevel implementation plans migration runbooks method of procedure documents rollback plans and validation plans

Configure validate and troubleshoot datacenter switching routing fabric and edge network components as directed by Fiserv

Support migration from legacy CiscoNexus paths and current AristaCiscoNFV environments into target datacenter architectures

Support secure DMZ firewall ADC NFV cloud and client connectivity integration from a network perspective

Drive practical issue resolution during build test cutover and stabilization phases

Create and maintain clear technical documentation including asbuilt records topology updates port mappings routeVRFVLAN mapping and handover material

Collaborate with Product Engineering security firewall ADC operations application carrier and clientfacing teams

Use automation scripting or structured tooling where practical to improve repeatability validation and documentation quality

5 Required Technical Capabilities

Very strong handson experience with Cisco Nexus datacenter switching platforms

Very strong handson experience with Arista EOS datacenter fabric environments

Strong spineleaf fabric aggregationaccess secure DMZ and datacenter interconnect understanding

Advanced routing capability across BGP OSPF ISIS route policy redistribution segmentation and traffic engineering

Strong practical experience with VRFs VLANs trunks LACP port channels MLAGvPCstyle designs and redundant datacenter connectivity

Working knowledge of MPLS VXLANEVPN FabricPath or equivalent datacentertransport technologies where relevant

Experience with migration of production traffic paths overlapping services NAT dependencies clientapplication flows and rollback planning

Awareness of Palo Alto firewall F5 ADC NFV and cloud connectivity integration requirements sufficient to coordinate effectively with specialist teams

Experience with AWSAzure connectivity concepts such as Direct Connect ExpressRoute VPN routing and cloud route control

Strong troubleshooting skills across L1L4 routing forwarding asymmetric paths MTU packet loss failover and performance issues

Ability to produce highquality implementation documentation and evidence suitable for change governance and operational handover

6 Preferred Capabilities

Experience in hyperscale global financial services large serviceprovider or similarly complex network environments

Experience with payment environments PCIsensitive segmentation or highly controlled producti