UK peptides supplier — Next.js store + Royal Mail API

The Core Problem: A UK-based e-commerce supplier needed an automated way to generate shipping labels, embed their store into B2B partner sites, and handle complex discount accounting cleanly without messy spreadsheet workarounds.

The Technical Solution: I built a high-performance Next.js e-commerce platform tailored for their specific operational needs.

• Fulfillment: Integrated the Royal Mail Pro Shipping API for instant label generation.

• Architecture: Separated the Fena discount logic into its own Prisma schema field for clean accounting.

• B2B Expansion: Built an embeddable iframe hero for partner sites and an external orders REST API (which later powered a separate Flutter PWA platform).

Measurable Business Impact: Fully automated the label generation process, saving hours of manual daily fulfillment. Enabled the brand to expand its reach through embeddable partner sites and external API orders.

Tech Stack: Next.js, Prisma, Royal Mail Pro Shipping API, Fena.