This is one of our favourite case studies, precisely because we get to be deliberately cagey about it. The client is a well-known online platform that millions of people use to think, plan and get things done. Beyond that, our lips are sealed, the NDA is signed, and the lawyers are watching. So here's the work - with the names filed off.

Our mystery client had built their product as a sprawling, multi-service backend - a whole fleet of microservices, all running happily on Heroku. Heroku had been brilliant for moving fast in the early days, but the platform had outgrown it: scaling was coarse and pricey, the dyno model kept getting in the way, and they needed far finer control over networking, resources and cost as they grew.

The goal: lift the entire estate onto Kubernetes - without a single one of their users ever noticing.

We re-platformed the whole microservice architecture from Heroku onto Google Kubernetes Engine. That meant containerising each service and then rebuilding everything Heroku had quietly been handling for them: ingress and networking, service-to-service communication, secrets and configuration, horizontal autoscaling, health checks and rolling deploys, and the CI/CD pipelines to ship it all.

Then came the careful part - a staged, zero-downtime cutover, shifting traffic service by service so the live product never skipped a beat. We'd show you the architecture diagram, but then we'd have to you.

The platform now runs on infrastructure that scales up and down with real demand, rather than in clunky, expensive steps. Costs are predictable, the old Heroku ceilings are gone, and the team has plenty of headroom to grow into - all on the same Google Cloud Kubernetes stack we run everything on, including this very website.

Their users got every bit of that and noticed precisely nothing. Which, for a migration like this, is exactly the point.

• Docker
• Kubernetes
• Google Cloud
• Helm
• CI/CD
• Heroku → GKE

There's no link to click and no logo to show you here - that's rather the whole idea. But if your own platform is quietly outgrowing its current home, we'd love to (discreetly) help.