Replatforming sounds like a 12-month project with high risk. There is a different path: renew the frontend in phases while the WEBSALE backend runs unchanged. No big bang, no parallel operation of two backends, no duplicate data management. This article shows what that looks like in practice, what is realistic in which timeframe, and where the rollback points are.

The core principle: frontend-first, backend stays

WEBSALE operates a REST-based Storefront API. This API is the only touchpoint between backend and frontend. Laioutr connects to this API without any WEBSALE-side changes. The backend - product data, pricing logic, B2B configurations, subscription features, order processing - continues running unchanged.

This means: replatforming in the classical sense (switching backends, migrating data, operating two systems in parallel) is not necessary. What gets renewed is the frontend layer.

Phase model: what the transition looks like

Phase 0 - Preparation (weeks 1 to 2)

Before any code runs, two tasks need to be completed:

WEBSALE API review: Which endpoints are used? Product data, category structure, cart, checkout, account? Are all required endpoints documented and stable? Is there B2B-specific logic (customer groups, price lists, approval workflows) anchored in the checkout flow?

Sitemap and prioritization: Which pages get migrated first? Recommendation: start with landing pages and category pages (high marketing impact, no transaction risk), then product detail pages, finally cart and checkout.

Phase 1 - Core connection and first pages (weeks 2 to 4)

The Laioutr connector for WEBSALE is configured. API endpoints are registered, data mapping is validated, first components (product list, hero banner, navigation elements) are verified with real WEBSALE data.

Deliverable after Phase 1: A preview environment with real WEBSALE product data where marketing can see first page drafts. Nothing is live; everything is reversible.

Phase 2 - Landing pages and category pages (weeks 4 to 8)

New pages are built in parallel to the existing WEBSALE storefront. Traffic still runs entirely through the existing frontend. New Laioutr pages are reviewed on a staging domain; SEO redirects are prepared (but not yet activated).

Rollback point: Until the end of this phase, a stop without production impact is possible. No customer sees the new pages.

Phase 3 - Soft launch for selected pages (weeks 8 to 10)

Individual landing pages or category pages are routed to the new Laioutr frontend (via A/B routing or DNS routing at the URL level). The existing storefront continues running. SEO impact is measured; performance metrics (LCP, CLS, INP) are compared across both variants.

What does not happen here: No cart switch, no checkout switch, no account switch. Only editorial and category pages. Transaction risk is zero.

Rollback: Revert the DNS change. 5 minutes.

Phase 4 - Product detail pages (weeks 10 to 14)

Product detail pages are migrated. This is the first step with real commerce context (add-to-cart button), but cart and checkout continue running via WEBSALE-native endpoints. Technically, the WEBSALE Storefront API is the glue: add-to-cart goes directly to WEBSALE, the checkout flow is WEBSALE-native.

Phase 5 - Cart and checkout (optional, from week 14)

If the Laioutr headless checkout is to be used: now. This is the only step with real transaction risk. Before go-live: complete end-to-end testing for all relevant checkout scenarios (B2B customer groups, vouchers, different payment methods, approval workflows).

Rollback plan: For critical issues in the Laioutr checkout, routing can be switched back to the WEBSALE-native checkout within minutes. Cart state is managed per session and is not backend-bound.

Phase 6 - Full migration and cleanup (weeks 14 to 18)

All pages run on the new frontend. The old WEBSALE storefront configuration can be deactivated. SEO redirects are active and verified. Performance baseline is documented.

Realistic timeline

• 0 - Preparation: Weeks: 1 to 2 · Risk level: None · Rollback possible?: Not needed
• 1 - Core connection: Weeks: 2 to 4 · Risk level: Very low · Rollback possible?: Yes, fully
• 2 - Landing pages/categories: Weeks: 4 to 8 · Risk level: Low · Rollback possible?: Yes, fully
• 3 - Soft launch: Weeks: 8 to 10 · Risk level: Low · Rollback possible?: Yes, 5 minutes
• 4 - Product detail pages: Weeks: 10 to 14 · Risk level: Medium · Rollback possible?: Yes, DNS
• 5 - Checkout (optional): Weeks: from 14 · Risk level: Medium to high · Rollback possible?: Yes, routing
• 6 - Full migration: Weeks: 14 to 18 · Risk level: Low · Rollback possible?: No longer needed

Total time to full migration: 14 to 18 weeks, with clear preparation and consistent phase discipline.

Important: these week numbers assume a focused execution context. If the project runs in parallel with other priorities, 6 months is more realistic. Frontend-first migrations fail not because of the concept but because of resource prioritization.

SEO risk minimization

Every frontend migration carries SEO risk. The most important protective measures:

Pre-launch crawl: Before activating each phase, run a crawl of the target URLs with Screaming Frog or equivalent - check status codes, title tags, meta descriptions, canonicals.

Redirect mapping prepared: If URL structures change, prepare and test 301 redirects before go-live. WEBSALE and Laioutr pages can temporarily run in parallel under different domains.

GSC monitoring: Connect Google Search Console to both domains before starting. Traffic drops are visible within 48 hours.

Lighthouse baseline: Measure performance before and after each phase change. LCP deterioration is an SEO signal; with Laioutr, improvement is typical (LCP median 1.2 s in live frontends).

Common pitfalls

Underestimating B2B logic in checkout: If WEBSALE is operated with customer groups, individual price lists or approval workflows, Phase 5 (checkout migration) requires significantly more testing effort. Plan at least 2 to 4 weeks for B2B checkout testing.

Activating SEO redirects too late: 301 redirects must be active on the day of go-live, not afterward. Missing redirects mean temporary 404s - Google interprets this as content removal.

Wanting to migrate all pages at once: Big-bang migrations have a poor success rate. Going in phases is not only safer but also faster in the overall result.

Forgetting stakeholder alignment: Marketing and IT must share the same phase definition. Who decides on the go-live for Phase 3? Who triggers the rollback? Clarify this before starting.

Internal links

• Headless Frontend for WEBSALE
• WEBSALE Storefront API + Laioutr connection
• Composable Headless Frontend
• Performance and Core Web Vitals
• Pricing
• Contact

FAQ

Does WEBSALE need to agree or participate?

No. The Storefront API is the only touchpoint. WEBSALE-side configuration changes are not required. The WEBSALE support system is not affected by the migration.

What happens to existing WEBSALE customizations (custom templates, plugins)?

These customizations continue running at the backend level. Only frontend-side presentation logic is taken over by Laioutr. Backend plugins that control commerce logic (tax calculation, shipping logic, B2B price finding) are not affected.

How do I protect SEO rankings during migration?

Redirect mapping before go-live, pre-launch crawl, GSC monitoring, Lighthouse baseline. Laioutr typically improves performance metrics, which is positive for SEO long-term.

Can I migrate only part of the pages and leave the rest with WEBSALE?

Yes. The phase strategy allows partial migration. Landing pages that frequently need marketing content are particularly suited for the first step.

What if something goes wrong in checkout?

Routing rollback to the WEBSALE-native checkout is possible in minutes. Cart state is preserved because it is managed session-based in WEBSALE.

Will Laioutr also migrate data from WEBSALE (customer data, order history)?

No. Laioutr is a frontend layer. Customer data, order history and all commerce data stay in WEBSALE. There is no data migration.