STELLAVIX
Tech · Growth · Intelligence
Tech · Growth · Intelligence
A profitable Shopify app developer had outgrown their one-VM setup. We rebuilt their infra to scale through their busiest hour of the year.
2.4x last year
BFCM peak traffic
0.02%
Webhook processing errors
1 (false alarm)
Engineering on-call wakes
None
Customer escalations
App was processing 80% of orders during a 4-hour window every November. The existing VM crashed twice last year. The team was scared of this one.
ECS Fargate behind ALB. Per-tenant logical isolation, single cluster.
RDS Aurora with reader replicas for hot-path queries.
EventBridge bus for Shopify webhooks—idempotent processors, DLQ wired.
Load test up to 3x projected peak. Fixed the three things that broke.
Black Friday playbook with paging and a rollback path.
“I slept on Black Friday for the first time in three years.”
Tell us what you're building. We'll write back within a business day with an honest read—whether we're the right fit or not.