Chantier de déconstruction d'un immeuble de bureaux à Paris - colonnes en béton dénudées, vitrages empilés au sol prêts au réemploi et grandes baies vitrées ouvrant sur la ville
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Backacia

B2B reuse marketplace for construction materials

Built, hosted and operated Backacia.com between 2016 and 2025 - a B2B marketplace letting construction professionals buy and sell second-hand building materials and equipment, and embedding the sector into a circular economy.

Inside the project

Client brief

Backacia is an online platform for construction professionals - contractors, project owners, local authorities and associations - that makes it easy to buy and sell second-hand building materials and equipment. By driving reuse, Backacia cuts down the waste of one of the most resource-hungry sectors and pulls the building industry into a circular-economy model.

Launched in 2016, the start-up was looking from day one for a technical partner able to imagine and build a robust marketplace, absorb its growth, and keep evolving it over time without a re-platforming - from the product catalogue and its business-specific attributes all the way to ordering, payment and logistics flows.

Our approach

Between 2016 and 2025, we supported Backacia end-to-end: design, development, hosting and managed operations of the marketplace and its internal tools.

1. Initial build (2016 - 2018). Functional design of the B2B marketplace, data model and architecture, then development of the core modules: product sheets with construction-specific attributes (materials, dimensions, availability, location, status), professional buyer journey and checkout flow, vendor and catalogue management, multi-role back-office for the Backacia team.

2. Continuous evolutions (2018 - 2025). Sprint after sprint, we extended the product surface (new categories, batch listings, transport and pickup logistics), shipped automations for the Backacia team (follow-ups, transaction tracking, accounting exports), wired up payment and logistics integrations, and iterated on UX to smooth the journey on both the buyer and seller sides.

3. Hosting and managed operations. Throughout the engagement, our team handled the platform's hosting plus corrective and evolutive maintenance, staying available for traffic peaks and emerging technical topics.

The project today

Launched in 2016, Backacia.com now powers 500+ construction projects and counts more than 2,000 professional customers. Around it, the Backacia team has built a full offering covering PEMD diagnostics, circular-economy advisory and the resale marketplace itself.

After nearly a decade of partnership and successive evolutions, in 2025 we hand over a mature marketplace and a well-tooled ecosystem to the Backacia team, who can now keep developing it fully autonomously.

Client testimonial

We turned to Michel and his team for the redesign of our marketplace. The team is skilled and extremely responsive. We particularly appreciated that Bluesquare proactively brought ideas to the table and took the initiative to suggest technical solutions and evolutions. Thanks to Bluesquare, we automated several processes and freed up real time for our teams - highly recommended!

Késia Vasconcelos

Késia Vasconcelos

Co-founder · Backacia

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