Replatforming a global industrial PC maker for composable commerce.

The legacy monolith was a constant friction point. Every business change required a workaround. Three problems compounded the issue.

First, a complex catalog. OnLogic's products are configurable to thousands of variants — different chassis, processors, memory, I/O combinations. The legacy system flattened this, forcing customers through a buying experience that felt more like a database query than a configurator.

Second, a global audience. Multiple languages, currencies, tax regimes, and localized content — none of which the existing platform handled gracefully.

Third, a roadmap held hostage. Strategic projects kept ending in "we can't do that with our current stack." Innovation cycles stretched out.

We rebuilt the commerce stack around three principles: composable, headless, swappable.

commercetools became the headless core, handling cart, checkout, and order orchestration. Contentful took on content. Algolia owned product discovery and search. Each piece selected for what it does best — each piece replaceable when something better comes along.

I ran a co-delivery model across both teams: Orium engineers and OnLogic engineers, spanning North and South American time zones, working as one squad. We started with a proof-of-concept to validate the architecture against OnLogic's most demanding flows before scaling commitment.

OnLogic now operates on a platform built for their business. The custom price engine handles configurable products without manual reconciliation. The checkout supports every payment method and tax rule across their international markets — credit cards, bank transfers, Bancontact, SOFORT, giropay, PayPal, and OnLogic's own financing — each with the state management to keep the buying flow coherent.

Just as importantly, the team came out of the project with a platform their roadmap can actually build on. "We can't do that" is no longer the default answer.