Mosaic Conseil operates as a small, remote workshop dedicated to rebuilding business artifacts. Whether it is a pricing grid, a three year plan, or a complex diligence file, we take things apart on the bench and put them back together against the evidence of the invoice ledger. Our process is personal and focused. We do not work on standing retainers and we do not produce slide decks. Instead, we return the same artifacts our clients sent, redrawn and supported by a written argument. We focus on four specific rooms: financial services, industrial networks, growing software companies, and healthcare systems. Our partner is a leading Spanish telecommunications provider, and we are currently working with them to refine their internal analytical structures.

About Mosaic Conseil
We are a boutique remote consultancy where professionals rebuild business plans and financial models with precision. We prioritize written arguments and deep work over corporate theater. We keep the workshop small on purpose to ensure that the people who do the work also handle the communication.



Every file we produce carries two names: one person who builds and one who argues against what was built. This ensures that every assumption is tested before a file closes. By staying small and remote, we remain independent and focused on the evidence at the floor of the business. Our work is handled on paper and backed by a telephone number that answers for ninety days after delivery.

What you would do
As a Frontend Engineer Intern, you will work within our software room to build the interfaces that house our financial and analytical models. You will be responsible for creating clear, functional web components that allow our clients, including our Spanish telecommunications partner, to interact with complex data artifacts. This involves translating logical models into responsive and intuitive browser based tools. You will participate in our builder and challenger process, where you will either build a

📌 Frontend Engineer Intern (Madrid)
🏢 Mosaic Conseil
📍 Madrid