The problem
The company was scaling a cross-border money transfer business across multiple jurisdictions. Product and payments work could not wait for a patchwork of regional AWS accounts. Leadership needed one core cloud platform that respected multi-sovereignty constraints—Americas, EMEA, and India—while giving engineers a repeatable place to run production and non-production workloads.
Beyond networking and guardrails, the platform had to solve identity and interconnect: single sign-on for operators and systems, and secure integration paths into external partner and vendor networks that money-movement stacks depend on. Ad hoc VPCs and one-off VPN tunnels would not pass scrutiny or keep up with growth.
Initial state
- No multi-account baseline — core security, logging, and network functions were not separated into dedicated accounts with org-wide guardrails
- Multi-sovereignty without a pattern — data residency and processing requirements across Americas, EMEA, and India demanded regional isolation without rebuilding the cloud for every jurisdiction
- Identity gap — teams lacked a unified single sign-on foundation for platform access and consistent identity controls as new accounts and environments came online
- Partner and vendor interconnect unfinished — external networks that payments and operations relied on needed first-class connectivity into the AWS estate, not one-off tunnels per region
- Manual provisioning risk — without StackSets and parameterized templates, every new environment would reintroduce drift and audit exposure
Our approach
- Multi-sovereignty, redundant-region cloud — designed and built a seven-region AWS foundation across the Americas, EMEA, and India with hub-and-spoke transit, Control Tower guardrails, and per-jurisdiction data residency and processing controls—so sovereignty requirements did not force separate, ad hoc cloud estates
- Core platform, not a one-off VPC — delivered the shared AWS control plane application teams would live on: accounts, networking, DNS, hybrid connectivity, and infrastructure-as-code they could extend
- Single sign-on foundation — established SSO so operators and systems authenticated consistently across the multi-account organization instead of accumulating per-account credentials and broken joiners/leavers
- Partner and vendor network integration — designed connectivity and routing patterns that brought external partner and vendor networks into the same transit model as internal workloads—auditable, regional, and repeatable
- Control Tower customizations — extended AWS Control Tower with a manifest-driven deployment pipeline (CodePipeline, Step Functions, Lambda, and CloudFormation StackSets) for org-wide rollouts
- Core account topology — dedicated security, logging, network, and shared-services accounts with SSM Parameter Store exports so downstream stacks reference a single source of truth
- Multi-region transit hub — transit gateways in seven regions with route tables for infrastructure, edge, on-premises/partner, and VPC attachment traffic
- Spoke VPC factory — parameterized VPC templates with integrated DNS for network, shared-services, and workload accounts across prod, shared-prod, stage, UAT, and SIT tiers
- Infrastructure as code — version-controlled CloudFormation templates and per-spoke CIDR parameter files so geography and environment additions follow the same pipeline
Outcomes
- Core AWS platform operational — multi-account organization with Control Tower customizations and StackSet-driven deployments instead of console-driven one-offs
- Multi-sovereignty ready — regional patterns for Americas, EMEA, and India across production and non-production tiers with residency and processing controls built into the design
- SSO in place — unified identity access across the platform accounts and environments
- Partner and vendor networks connected — external interconnect paths integrated into the same hub-and-spoke model as internal workloads
- Team self-service path — application teams could onboard to standardized spokes rather than negotiating bespoke network and identity builds per project
“Cross-border money movement does not forgive a fragmented cloud. We needed one platform that respected sovereignty, authenticated people and systems the same way everywhere, and plugged partner networks in by design—not by emergency VPN.”
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