Cloud Migration & Architecture
From Crashing Every Sale Day to Handling 18× Peak Load
A leading regional fashion e-commerce brand with 4M+ monthly visitors.
The challenge
Every major sale event was a crisis. The site would slow, freeze, or fall over entirely during the first hour of a promotion. Revenue was being left on the table by the hundreds of thousands.
The monolithic application on a handful of dedicated servers couldn't scale horizontally. Adding compute made things worse, not better.
Cloud migration had been on the roadmap for two years. It hadn't moved because the team was afraid of breaking a working business during the lift.
Our approach — the ADAS framework in practice
Architect
Audited the application, traffic patterns, and database hotspots. Designed a strangler-pattern migration that prioritised the highest-load services, with risk and rollback planned at every step.
Deliver
Moved priority services to managed cloud infrastructure while the monolith kept serving the rest. Re-architected the database layer with read replicas and caching. Ran the next major sale on the new stack.
Advise
Sat with leadership through architecture decisions and stayed available as their platform partner — interpreting cloud bills, advising on vendor lock-in, shaping their in-house DevOps capability.
Scale
Set up autoscaling tuned to their actual sale-day profile, not generic templates. The platform now absorbs spikes automatically. New markets and channels plug in without infra projects.
The outcome
The next flash sale handled 18× their previous peak traffic with zero downtime. Page load times improved across the board, even at normal traffic. Monthly infrastructure cost dropped because they were no longer over-provisioning for sale days.
18× prior
Peak traffic handled
0 min
Sale-day downtime
−63%
Avg. page load
−31%
Infra cost / month
Why it mattered
“Cloud migration isn't a project. It's a sequence of business decisions about what to move first, what to leave alone, and what to rebuild on the way.”
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If you're a founder or operator building something serious, and you're tired of hourly billing, slow timelines, and partners who don't understand your business. Let's talk.
Prefer email? Write to us directly at info@critonyx.com